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description Publicationkeyboard_double_arrow_right Article , Other literature type 2002 FrancePublisher:Copernicus GmbH Authors: J. M. Becker; D. Bercovici; D. Bercovici;J. M. Becker; D. Bercovici; D. Bercovici;The coupled interaction of long standing hydrodynamic waves with a deformable non-Newtonian seabed is examined using a two-layer model for which the upper layer fluid is inviscid and the lower layer is bi-viscous. The two-dimensional response of the system to forcing by a predominantly longitudinal (cross-shore) standing wave perturbed by a small transverse (along-shore) component is determined. With a constant yield stress in the bi-viscous lower layer, there is little amplification of these transverse per-turbations and the model response typically remains quasi-one-dimensional. However, for a bi-viscous layer with a pressure-dependent yield stress (which represents the effect that the seabed deforms less readily under compression and hence renders the rheology history dependent), the initially small transverse motions are amplified in some parameter regimes and two-dimensional, permanent bedforms are formed in the lower layer. This simple dynamical model is, therefore, able to explain the formation of permanent bedforms with significant cross- and along-shore features by predominantly cross-shore standing wave forcing.
Hyper Article en Lig... arrow_drop_down Hyper Article en Ligne; Hal-DiderotOther literature type . Article . 2002Nonlinear Processes in Geophysics (NPG)Other literature type . 2018Data sources: Copernicus PublicationsNonlinear Processes in Geophysics (NPG)Article . 2002 . Peer-reviewedLicense: CC BY NC SAData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2002Full-Text: https://hal.science/hal-00302074/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/npg-9-61-2002&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Hyper Article en Lig... arrow_drop_down Hyper Article en Ligne; Hal-DiderotOther literature type . Article . 2002Nonlinear Processes in Geophysics (NPG)Other literature type . 2018Data sources: Copernicus PublicationsNonlinear Processes in Geophysics (NPG)Article . 2002 . Peer-reviewedLicense: CC BY NC SAData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2002Full-Text: https://hal.science/hal-00302074/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/npg-9-61-2002&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2006 United Kingdom, France, FrancePublisher:American Meteorological Society Cane, M. A.; Braconnot, P.; Clement, A.; Gildor, H.; Joussaume, S.; Kageyama, M.; Khodri, M.; Paillard, D.; Tett, S.; Zorita, E.;Abstract This paper briefly surveys areas of paleoclimate modeling notable for recent progress. New ideas, including hypotheses giving a pivotal role to sea ice, have revitalized the low-order models used to simulate the time evolution of glacial cycles through the Pleistocene, a prohibitive length of time for comprehensive general circulation models (GCMs). In a recent breakthrough, however, GCMs have succeeded in simulating the onset of glaciations. This occurs at times (most recently, 115 kyr b.p.) when high northern latitudes are cold enough to maintain a snow cover and tropical latitudes are warm, enhancing the moisture source. More generally, the improvement in models has allowed simulations of key periods such as the Last Glacial Maximum and the mid-Holocene that compare more favorably and in more detail with paleoproxy data. These models now simulate ENSO cycles, and some of them have been shown to reproduce the reduction of ENSO activity observed in the early to middle Holocene. Modeling studies have demonstrated that the reduction is a response to the altered orbital configuration at that time. An urgent challenge for paleoclimate modeling is to explain and to simulate the abrupt changes observed during glacial epochs (i.e., Dansgaard–Oescher cycles, Heinrich events, and the Younger Dryas). Efforts have begun to simulate the last millennium. Over this time the forcing due to orbital variations is less important than the radiance changes due to volcanic eruptions and variations in solar output. Simulations of these natural variations test the models relied on for future climate change projections. They provide better estimates of the internal and naturally forced variability at centennial time scales, elucidating how unusual the recent global temperature trends are.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1175/jcli3899.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 50 citations 50 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1175/jcli3899.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2000 France, United KingdomPublisher:Copernicus GmbH Wright, D. M.; Davies, J. A.; Robinson, T. R.; Chapman, P. J.; Yeoman, T. K.; Thomas, E. C.; Lester, M.; Cowley, S. W. H.; Stocker, A. J.; Horne, R. B.; Honary, F.;SPEAR is a new polar cap HF radar facility which is to be deployed on Svalbard. The principal capabilities of SPEAR will include the generation of artificial plasma irregularities, operation as an 'all-sky' HF radar, the excitation of ULF waves, and remote sounding of the magnetosphere. Operation of SPEAR in conjunction with the multitude of other instruments on Svalbard, including the EISCAT Svalbard radar, and the overlap of its extensive field-of-view with that of several of the HF radars in the SuperDARN network, will enable in-depth diagnosis of many geophysical and plasma phenomena associated with the cusp region and the substorm expansion phase. Moreover, its ability to produce artificial radar aurora will provide a means for the other instruments to undertake polar cap plasma physics experiments in a controlled manner. Another potential use of the facility is in 'field-line tagging' experiments, for coordinated ground-satellite experiments. Here the scientific objectives of SPEAR are detailed, along with the proposed technical specifications of the system.<br><br><b>Key words: </b>Ionosphere (active experiments) – Radio science (instruments and techniques) – Space plasma physics (instruments and techniques)
Lancaster EPrints arrow_drop_down Annales GeophysicaeArticle . 2000 . Peer-reviewedLicense: http://www.egu.euData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2000Full-Text: https://hal.science/hal-00316797/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s005850000258&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 23 citations 23 popularity Average influence Top 10% impulse Average Powered by BIP!visibility 2visibility views 2 download downloads 51 Powered bymore_vert Lancaster EPrints arrow_drop_down Annales GeophysicaeArticle . 2000 . Peer-reviewedLicense: http://www.egu.euData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2000Full-Text: https://hal.science/hal-00316797/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s005850000258&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Conference object 2013 FrancePublisher:Springer Science and Business Media LLC Funded by:UKRI | Earthquake hazard from 36...UKRI| Earthquake hazard from 36-Cl exposure dating of elapsed time and Coulomb stress transferPatience A. Cowie; C. H. Scholz; Gerald P. Roberts; J. Faure Walker; Philippe Steer;doi: 10.1038/ngeo1991
International audience; Viscous flow at depth contributes to elastic strain accumulation along seismogenic faults during both post-seismic and inter-seismic phases of the earthquake cycle. Evaluating the importance of this contribution is hampered by uncertainties regarding (i) the extent to which viscous deformation occurs in shear zones or by distributed flow within the crust and/or upper mantle, and (ii) the value of the exponent, n, in the flow law that relates strain rate to applied stress. Geodetic data, rock deformation experiments, and field observations of exhumed (inactive) faults provide strong evidence for non-linear viscous flow but may not fully capture the long term, in situ behaviour of active fault zones. Here we demonstrate that strain rates derived from Holocene offsets on seismogenic normal faults in the actively uplifting and extending central and southern Italian Apennines may be used to address this issue. The measured strain rates, averaged over a time scale of 104 years, exhibit a well-defined power-law dependence on topographic elevation with a power-law exponent ≈ 3.0 (2.7 - 3.4 at 95% CI; 2.3 - 4.0 at 99% CI). Contemporary seismicity indicates that the upper crust in this area is at the threshold for frictional failure within an extensional stress field and therefore differential stress is directly proportional to elevation. Our data thus imply a relationship between strain rate and stress that is consistent with non-linear viscous flow, with n ≈ 3, but because the measurements are derived from slip along major crustal faults they do not represent deformation of a continuum. We know that, down-dip of the seismogenic part of active faults, cataclasis, hydrous alteration, and shear heating all contribute to grain size reduction and material weakening. These processes initiate localisation at the frictional-viscous transition and the development of mylonitic shear zones within the viscous regime. Furthermore, in quartzo-feldspathic crust, mylonites form a fabric of mineral segregated layers parallel to shear with their strength controlled by the weakest phase: quartz. Using a published flow law for wet quartz calibrated for mylonitic rocks to fit the strain rates across individual fault zones (~5 km wide), we estimate a lower bound on the temperature of the deforming material using our data. This temperature is reached at or just below the base of the seismogenic zone, as constrained by regional surface heat flow data and the depth distribution of crustal seismicity. We conclude that it is the rate of viscous flow in quartz-rich mylonitic shear zones, not distributed flow within the lower crust and/or upper mantle, which modulates the Holocene slip rates on the up-dip seismogenic part of the faults in this area. Our observations support the idea that the irregular, stick-slip movement of brittle faults, and hence earthquake recurrence, are ultimately modulated by down-dip viscous flow over multiple earthquake cycles.
Nature Geoscience; H... arrow_drop_down Nature Geoscience; Hal-DiderotArticle . 2013Hyper Article en Ligne; Hal-DiderotOther literature type . Conference object . 2013HAL-Rennes 1; Mémoires en Sciences de l'Information et de la CommunicationConference object . 2013add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1038/ngeo1991&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 43 citations 43 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Nature Geoscience; H... arrow_drop_down Nature Geoscience; Hal-DiderotArticle . 2013Hyper Article en Ligne; Hal-DiderotOther literature type . Conference object . 2013HAL-Rennes 1; Mémoires en Sciences de l'Information et de la CommunicationConference object . 2013add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1038/ngeo1991&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2012 FrancePublisher:American Geophysical Union (AGU) Nicolas Brantut; Alexandre Schubnel; Emmanuel C. David; Eva Héripré; Yves Guéguen; Alexandre Dimanov;doi: 10.1029/2011jb008730
Experimental heating tests were performed on Volterra gypsum to study the micromechanical consequences of the dehydration reaction. The experimental conditions were drained at 5 MPa fluid pressure and confining pressures ranging from 15 to 55 MPa. One test was performed with a constantly applied differential stress of 30 MPa. The reaction is marked by (1) a porosity increase and homogeneous compaction, (2) a swarm of acoustic emissions, (3) a large decrease in P and S wave velocities, and (4) a decrease in VP/VS ratio. Wave velocity data are interpreted in terms of crack density and pore aspect ratio, which, modeling pores as spheroids, is estimated at around 0.05 (crack‐like spheroid). Complementary tests performed in an environmental scanning electron microscope indicate that cracks first form inside the gypsum grains and are oriented preferentially along the crystal structure of gypsum. Most of the visible porosity appears at later stages when grains shrink and grain boundaries open. Extrapolation of our data to serpentinites in subduction zones suggest that the signature of dehydrating rocks in seismic tomography could be a low apparent Poisson's ratio, although this interpretation may be masked by anisotropy development due to preexisting crystal preferred orientation and/or deformation‐induced cracking. The large compaction and the absence of strain localization in the deformation test suggests that dehydrating rocks maybe seen as soft inclusions and could thus induce ruptures in the surrounding, nonreacting rocks.
HAL CY Cergy Paris U... arrow_drop_down Journal of Geophysical Research AtmospheresArticle . 2012 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2011jb008730&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 51 citations 51 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert HAL CY Cergy Paris U... arrow_drop_down Journal of Geophysical Research AtmospheresArticle . 2012 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2011jb008730&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Article 2015 Netherlands, France, FrancePublisher:American Geophysical Union (AGU) Funded by:EC | GEOCARBON, EC | MACC-III, UKRI | Amazon Integrated Carbon ... +1 projectsEC| GEOCARBON ,EC| MACC-III ,UKRI| Amazon Integrated Carbon Analysis / AMAZONICA ,NWO| The distribution and evolution of inert and reactant scalars: from the atmospheric boundary layer to continental scalesAuthors: I. T. van der Laan-Luijkx; I. R. van der Velde; Maarten Krol; Luciana V. Gatti; +10 AuthorsI. T. van der Laan-Luijkx; I. R. van der Velde; Maarten Krol; Luciana V. Gatti; Lucas G. Domingues; Caio S. C. Correia; John B. Miller; Manuel Gloor; T. T. van Leeuwen; Johannes W. Kaiser; Christine Wiedinmyer; Sourish Basu; Cathy Clerbaux; Wouter Peters;AbstractTwo major droughts in the past decade had large impacts on carbon exchange in the Amazon. Recent analysis of vertical profile measurements of atmospheric CO2 and CO by Gatti et al. (2014) suggests that the 2010 drought turned the normally close‐to‐neutral annual Amazon carbon balance into a substantial source of nearly 0.5 PgC/yr, revealing a strong drought response. In this study, we revisit this hypothesis and interpret not only the same CO2/CO vertical profile measurements but also additional constraints on carbon exchange such as satellite observations of CO, burned area, and fire hot spots. The results from our CarbonTracker South America data assimilation system suggest that carbon uptake by vegetation was indeed reduced in 2010 but that the magnitude of the decrease strongly depends on the estimated 2010 and 2011 biomass burning emissions. We have used fire products based on burned area (Global Fire Emissions Database version 4), satellite‐observed CO columns (Infrared Atmospheric Sounding Interferometer), fire radiative power (Global Fire Assimilation System version 1), and fire hot spots (Fire Inventory from NCAR version 1), and found an increase in biomass burning emissions in 2010 compared to 2011 of 0.16 to 0.24 PgC/yr. We derived a decrease of biospheric uptake ranging from 0.08 to 0.26 PgC/yr, with the range determined from a set of alternative inversions using different biomass burning estimates. Our numerical analysis of the 2010 Amazon drought results in a total reduction of carbon uptake of 0.24 to 0.50 PgC/yr and turns the balance from carbon sink to source. Our findings support the suggestion that the hydrological cycle will be an important driver of future changes in Amazonian carbon exchange.
NARCIS arrow_drop_down NARCISArticle . 2015Full-Text: https://pure.rug.nl/ws/files/66807317/Laan_Luijkx_et_al_2015_Global_Biogeochemical_Cycles.pdfData sources: NARCISCORE (RIOXX-UK Aggregator)Article . 2015Full-Text: https://eprints.whiterose.ac.uk/88214/7/Laan-Luijkx_et_al-2015-Global_Biogeochemical_Cycles.pdfData sources: CORE (RIOXX-UK Aggregator)Research@WUR; Global Biogeochemical CyclesOther literature type . Article . 2015 . Peer-reviewedLicense: Wiley Online Library User AgreementNARCISOther literature type . Article . 2015Mémoires en Sciences de l'Information et de la Communication; HAL-UPMCConference object . 2015add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2014gb005082&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 59 citations 59 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!visibility 5visibility views 5 download downloads 36 Powered bymore_vert NARCIS arrow_drop_down NARCISArticle . 2015Full-Text: https://pure.rug.nl/ws/files/66807317/Laan_Luijkx_et_al_2015_Global_Biogeochemical_Cycles.pdfData sources: NARCISCORE (RIOXX-UK Aggregator)Article . 2015Full-Text: https://eprints.whiterose.ac.uk/88214/7/Laan-Luijkx_et_al-2015-Global_Biogeochemical_Cycles.pdfData sources: CORE (RIOXX-UK Aggregator)Research@WUR; Global Biogeochemical CyclesOther literature type . Article . 2015 . Peer-reviewedLicense: Wiley Online Library User AgreementNARCISOther literature type . Article . 2015Mémoires en Sciences de l'Information et de la Communication; HAL-UPMCConference object . 2015add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2014gb005082&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2021 United Kingdom, France, FrancePublisher:The Royal Society Funded by:UKRI | The Global Methane Budget, UKRI | UAS-Methane: An unmanned ..., UKRI | Evaluation, Quantificatio...UKRI| The Global Methane Budget ,UKRI| UAS-Methane: An unmanned aerial system for the remote sensing of methane flux ,UKRI| Evaluation, Quantification and Identification of Pathways and Targets for the assessment of Shale Gas RISK (EQUIPT4RISK)Authors: Shaw, Jacob T.; Shah, Adil; Yong, Han; Allen, Grant;Shaw, Jacob T.; Shah, Adil; Yong, Han; Allen, Grant;Methane is an important greenhouse gas, emissions of which have vital consequences for global climate change. Understanding and quantifying the sources (and sinks) of atmospheric methane is integral for climate change mitigation and emission reduction strategies, such as those outlined in the 2015 UN Paris Agreement on Climate Change. There are ongoing international efforts to constrain the global methane budget, using a wide variety of measurement platforms across a range of spatial and temporal scales. The advancements in unmanned aerial vehicle (UAV) technology over the past decade have opened up a new avenue for methane emission quantification. UAVs can be uniquely equipped to monitor natural and anthropogenic emissions at local scales, displaying clear advantages in versatility and manoeuvrability relative to other platforms. Their use is not without challenge, however: further miniaturization of high-performance methane instrumentation is needed to fully use the benefits UAVs afford. Developments in the models used to simulate atmospheric transport and dispersion across small, local scales are also crucial to improved flux accuracy and precision. This paper aims to provide an overview of currently available UAV-based technologies and sampling methodologies which can be used to quantify methane emission fluxes at local scales.This article is part of a discussion meeting issue 'Rising methane: is warming feeding warming? (part 1)'.
Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2021Full-Text: http://europepmc.org/articles/PMC8473951Data sources: PubMed CentralPhilosophical Transactions of the Royal Society A Mathematical Physical and Engineering SciencesArticleLicense: CC BYData sources: UnpayWallThe University of Manchester - Institutional RepositoryArticle . 2021Data sources: The University of Manchester - Institutional RepositoryPhilosophical Transactions of the Royal Society A Mathematical Physical and Engineering SciencesArticle . 2021 . Peer-reviewedLicense: Royal Society Data Sharing and AccessibilityData sources: CrossrefMémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2021License: CC BYFull-Text: https://hal.science/hal-03434913/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1098/rsta.2020.0450&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 18 citations 18 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2021Full-Text: http://europepmc.org/articles/PMC8473951Data sources: PubMed CentralPhilosophical Transactions of the Royal Society A Mathematical Physical and Engineering SciencesArticleLicense: CC BYData sources: UnpayWallThe University of Manchester - Institutional RepositoryArticle . 2021Data sources: The University of Manchester - Institutional RepositoryPhilosophical Transactions of the Royal Society A Mathematical Physical and Engineering SciencesArticle . 2021 . Peer-reviewedLicense: Royal Society Data Sharing and AccessibilityData sources: CrossrefMémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2021License: CC BYFull-Text: https://hal.science/hal-03434913/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1098/rsta.2020.0450&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2011 Germany, Spain, France, France, France, SpainPublisher:American Geophysical Union (AGU) Alvarez, M.; Tanhua, T.; Brix, H.; Lo Monaco, C.; Metzl, N.; Mcdonagh, E. L.; Bryden, H. L.;doi: 10.1029/2010jc006475
handle: 10508/8156 , 10261/316390
Within the Subantarctic Mode Water (SAMW) density level, we study temporal changes in salinity, nutrients, oxygen and TTD (Transit Time Distribution) ages in the western (W) and eastern (E) subtropical gyre of the Indian Ocean (IO) from 1987 to 2002. Additionally, changes in Total Alkalinity (TA) and Dissolved Inorganic Carbon (DIC) are evaluated between 1995 and 2002. The mechanisms behind the detected changes are discussed along with the results from a hindcast model run (Community Climate System Model). The increasing salinity and decreasing oxygen trends from 1960 to 1987 reversed from 1987 to 2002 along the gyre. In the W-IO a decreasing trend in TTD ages points to a faster delivery of SAMW, thus less biogenic matter remineralization, explaining the oxygen increase and noisier nutrients decrease. In the E-IO SAMW, no change in TTD ages was detected, therefore the trends in oxygen and inorganic nutrients relate to changes in the Antarctic Surface Water transported into the E-IO SAMW formation area. In the W-IO between 1995 and 2002, the DIC increase is equal or even less than the anthropogenic input as the reduction in remineralization contributes to mask the increasing trend. In the E-IO between 1995 and 2002, DIC decreases slightly despite the increase in the anthropogenic input. Differences in the preformed E-IO SAMW conditions would explain this behavior. Trends in the W and E IO SAMW are decoupled and related to different forcing mechanisms in the two main sites of SAMW formation in the IO, at 40°S–70°E and 45°S–90°E, respectively. 3
OceanRep arrow_drop_down Repositorio Institucional Digital del IEOArticle . 2011License: CC BY NC NDData sources: Repositorio Institucional Digital del IEOArchiMer - Institutional Archive of IfremerOther literature type . 2011Data sources: ArchiMer - Institutional Archive of IfremerRecolector de Ciencia Abierta, RECOLECTAArticle . 2011License: CC BY NC NDData sources: Recolector de Ciencia Abierta, RECOLECTAJournal of Geophysical Research AtmospheresArticle . 2011 . Peer-reviewedLicense: Wiley TDMData sources: CrossrefHAL-IRD; Hal-DiderotArticle . 2011Mémoires en Sciences de l'Information et de la CommunicationArticle . 2011Full-Text: https://hal.science/hal-00758303/documentRecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2011 . 2014add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 12 citations 12 popularity Average influence Average impulse Top 10% Powered by BIP!visibility 4visibility views 4 Powered bymore_vert OceanRep arrow_drop_down Repositorio Institucional Digital del IEOArticle . 2011License: CC BY NC NDData sources: Repositorio Institucional Digital del IEOArchiMer - Institutional Archive of IfremerOther literature type . 2011Data sources: ArchiMer - Institutional Archive of IfremerRecolector de Ciencia Abierta, RECOLECTAArticle . 2011License: CC BY NC NDData sources: Recolector de Ciencia Abierta, RECOLECTAJournal of Geophysical Research AtmospheresArticle . 2011 . Peer-reviewedLicense: Wiley TDMData sources: CrossrefHAL-IRD; Hal-DiderotArticle . 2011Mémoires en Sciences de l'Information et de la CommunicationArticle . 2011Full-Text: https://hal.science/hal-00758303/documentRecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2011 . 2014add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2010jc006475&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2008 FrancePublisher:American Meteorological Society Authors: Iudicone, Daniele; Madec, Gurvan; Blanke, Bruno; Speich, Sabrina;Iudicone, Daniele; Madec, Gurvan; Blanke, Bruno; Speich, Sabrina;Abstract Despite the renewed interest in the Southern Ocean, there are yet many unknowns because of the scarcity of measurements and the complexity of the thermohaline circulation. Hence the authors present here the analysis of the thermohaline circulation of the Southern Ocean of a steady-state simulation of a coupled ice–ocean model. The study aims to clarify the roles of surface fluxes and internal mixing, with focus on the mechanisms of the upper branch of the overturning. A quantitative dynamical analysis of the water-mass transformation has been performed using a new method. Surface fluxes, including the effect of the penetrative solar radiation, produce almost 40 Sv (1 Sv ≡ 106 m3 s−1) of Subantarctic Mode Water while about 5 Sv of the densest water masses (γ > 28.2) are formed by brine rejection on the shelves of Antarctica and in the Weddell Sea. Mixing transforms one-half of the Subantarctic Mode Water into intermediate water and Upper Circumpolar Deep Water while bottom water is produced by Lower Circumpolar Deep Water and North Atlantic Deep Water mixing with shelf water. The upwelling of part of the North Atlantic Deep Water inflow is due to internal processes, mainly downward propagation of the surface freshwater excess via vertical mixing at the base of the mixed layer. A complementary Lagrangian analysis of the thermohaline circulation will be presented in a companion paper.
Journal of Physical ... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; HAL-CEA; HAL-IRD; HAL-UPMCArticle . 2008License: CC BYFull-Text: https://hal.science/hal-00308922/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routeshybrid 52 citations 52 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Journal of Physical ... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; HAL-CEA; HAL-IRD; HAL-UPMCArticle . 2008License: CC BYFull-Text: https://hal.science/hal-00308922/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2021 FrancePublisher:Mary Ann Liebert Inc Lucia Mandon; Adam Parkes Bowen; C. Quantin-Nataf; John Bridges; John Carter; Lu Pan; Pierre Beck; Erwin Dehouck; Matthieu Volat; Nicolas Thomas; Gabriele Cremonese; Livio L. Tornabene; Patrick Thollot;pmid: 33646016
International audience; The European Space Agency and Roscosmos' ExoMars rover mission, which is planned to land in the Oxia Planum region, will be dedicated to exobiology studies at the surface and subsurface of Mars. Oxia Planum is a clay-bearing site that has preserved evidence of long-term interaction with water during the Noachian era. Fe/Mg-rich phyllosilicates have previously been shown to occur extensively throughout the landing area. Here, we analyze data from the High Resolution Imaging Science Experiment (HiRISE) and from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instruments onboard NASA's Mars Reconnaissance Orbiter and the Colour and Stereo Surface Imaging System (CaSSIS) onboard ESA's Trace Gas Orbiter to characterize, at a high spatial resolution, the morphological and spectral variability of Oxia Planum's surface deposits. Two main types of bedrocks are identified within the clay-bearing, fractured unit observed throughout the landing site: (1) an orange type in HiRISE correlated with the strongest detections of secondary minerals (dominated by Fe/Mg-rich clay minerals) with, in some locations, an additional spectral absorption near 2.5 μm, suggesting the mixture with an additional mineral, plausibly carbonate or another type of clay mineral; (2) a more bluish bedrock associated with weaker detections of secondary minerals, which exhibits at certain locations a ∼1 μm broad absorption feature consistent with olivine. Coanalysis of the same terrains with the recently acquired CaSSIS images confirms the variability in the color and spectral properties of the fractured unit. Of interest for the ExoMars mission, both types of bedrocks are extensively outcropping in the Oxia Planum region, and the one corresponding to the most intense spectral signals of clay minerals (the primary scientific target) is well exposed within the landing area, including near its center.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 33 citations 33 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Article , Other literature type 2002 FrancePublisher:Copernicus GmbH Authors: J. M. Becker; D. Bercovici; D. Bercovici;J. M. Becker; D. Bercovici; D. Bercovici;The coupled interaction of long standing hydrodynamic waves with a deformable non-Newtonian seabed is examined using a two-layer model for which the upper layer fluid is inviscid and the lower layer is bi-viscous. The two-dimensional response of the system to forcing by a predominantly longitudinal (cross-shore) standing wave perturbed by a small transverse (along-shore) component is determined. With a constant yield stress in the bi-viscous lower layer, there is little amplification of these transverse per-turbations and the model response typically remains quasi-one-dimensional. However, for a bi-viscous layer with a pressure-dependent yield stress (which represents the effect that the seabed deforms less readily under compression and hence renders the rheology history dependent), the initially small transverse motions are amplified in some parameter regimes and two-dimensional, permanent bedforms are formed in the lower layer. This simple dynamical model is, therefore, able to explain the formation of permanent bedforms with significant cross- and along-shore features by predominantly cross-shore standing wave forcing.
Hyper Article en Lig... arrow_drop_down Hyper Article en Ligne; Hal-DiderotOther literature type . Article . 2002Nonlinear Processes in Geophysics (NPG)Other literature type . 2018Data sources: Copernicus PublicationsNonlinear Processes in Geophysics (NPG)Article . 2002 . Peer-reviewedLicense: CC BY NC SAData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2002Full-Text: https://hal.science/hal-00302074/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Hyper Article en Lig... arrow_drop_down Hyper Article en Ligne; Hal-DiderotOther literature type . Article . 2002Nonlinear Processes in Geophysics (NPG)Other literature type . 2018Data sources: Copernicus PublicationsNonlinear Processes in Geophysics (NPG)Article . 2002 . Peer-reviewedLicense: CC BY NC SAData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2002Full-Text: https://hal.science/hal-00302074/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/npg-9-61-2002&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2006 United Kingdom, France, FrancePublisher:American Meteorological Society Cane, M. A.; Braconnot, P.; Clement, A.; Gildor, H.; Joussaume, S.; Kageyama, M.; Khodri, M.; Paillard, D.; Tett, S.; Zorita, E.;Abstract This paper briefly surveys areas of paleoclimate modeling notable for recent progress. New ideas, including hypotheses giving a pivotal role to sea ice, have revitalized the low-order models used to simulate the time evolution of glacial cycles through the Pleistocene, a prohibitive length of time for comprehensive general circulation models (GCMs). In a recent breakthrough, however, GCMs have succeeded in simulating the onset of glaciations. This occurs at times (most recently, 115 kyr b.p.) when high northern latitudes are cold enough to maintain a snow cover and tropical latitudes are warm, enhancing the moisture source. More generally, the improvement in models has allowed simulations of key periods such as the Last Glacial Maximum and the mid-Holocene that compare more favorably and in more detail with paleoproxy data. These models now simulate ENSO cycles, and some of them have been shown to reproduce the reduction of ENSO activity observed in the early to middle Holocene. Modeling studies have demonstrated that the reduction is a response to the altered orbital configuration at that time. An urgent challenge for paleoclimate modeling is to explain and to simulate the abrupt changes observed during glacial epochs (i.e., Dansgaard–Oescher cycles, Heinrich events, and the Younger Dryas). Efforts have begun to simulate the last millennium. Over this time the forcing due to orbital variations is less important than the radiance changes due to volcanic eruptions and variations in solar output. Simulations of these natural variations test the models relied on for future climate change projections. They provide better estimates of the internal and naturally forced variability at centennial time scales, elucidating how unusual the recent global temperature trends are.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1175/jcli3899.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 50 citations 50 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1175/jcli3899.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2000 France, United KingdomPublisher:Copernicus GmbH Wright, D. M.; Davies, J. A.; Robinson, T. R.; Chapman, P. J.; Yeoman, T. K.; Thomas, E. C.; Lester, M.; Cowley, S. W. H.; Stocker, A. J.; Horne, R. B.; Honary, F.;SPEAR is a new polar cap HF radar facility which is to be deployed on Svalbard. The principal capabilities of SPEAR will include the generation of artificial plasma irregularities, operation as an 'all-sky' HF radar, the excitation of ULF waves, and remote sounding of the magnetosphere. Operation of SPEAR in conjunction with the multitude of other instruments on Svalbard, including the EISCAT Svalbard radar, and the overlap of its extensive field-of-view with that of several of the HF radars in the SuperDARN network, will enable in-depth diagnosis of many geophysical and plasma phenomena associated with the cusp region and the substorm expansion phase. Moreover, its ability to produce artificial radar aurora will provide a means for the other instruments to undertake polar cap plasma physics experiments in a controlled manner. Another potential use of the facility is in 'field-line tagging' experiments, for coordinated ground-satellite experiments. Here the scientific objectives of SPEAR are detailed, along with the proposed technical specifications of the system.<br><br><b>Key words: </b>Ionosphere (active experiments) – Radio science (instruments and techniques) – Space plasma physics (instruments and techniques)
Lancaster EPrints arrow_drop_down Annales GeophysicaeArticle . 2000 . Peer-reviewedLicense: http://www.egu.euData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2000Full-Text: https://hal.science/hal-00316797/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s005850000258&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 23 citations 23 popularity Average influence Top 10% impulse Average Powered by BIP!visibility 2visibility views 2 download downloads 51 Powered bymore_vert Lancaster EPrints arrow_drop_down Annales GeophysicaeArticle . 2000 . Peer-reviewedLicense: http://www.egu.euData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2000Full-Text: https://hal.science/hal-00316797/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s005850000258&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Conference object 2013 FrancePublisher:Springer Science and Business Media LLC Funded by:UKRI | Earthquake hazard from 36...UKRI| Earthquake hazard from 36-Cl exposure dating of elapsed time and Coulomb stress transferPatience A. Cowie; C. H. Scholz; Gerald P. Roberts; J. Faure Walker; Philippe Steer;doi: 10.1038/ngeo1991
International audience; Viscous flow at depth contributes to elastic strain accumulation along seismogenic faults during both post-seismic and inter-seismic phases of the earthquake cycle. Evaluating the importance of this contribution is hampered by uncertainties regarding (i) the extent to which viscous deformation occurs in shear zones or by distributed flow within the crust and/or upper mantle, and (ii) the value of the exponent, n, in the flow law that relates strain rate to applied stress. Geodetic data, rock deformation experiments, and field observations of exhumed (inactive) faults provide strong evidence for non-linear viscous flow but may not fully capture the long term, in situ behaviour of active fault zones. Here we demonstrate that strain rates derived from Holocene offsets on seismogenic normal faults in the actively uplifting and extending central and southern Italian Apennines may be used to address this issue. The measured strain rates, averaged over a time scale of 104 years, exhibit a well-defined power-law dependence on topographic elevation with a power-law exponent ≈ 3.0 (2.7 - 3.4 at 95% CI; 2.3 - 4.0 at 99% CI). Contemporary seismicity indicates that the upper crust in this area is at the threshold for frictional failure within an extensional stress field and therefore differential stress is directly proportional to elevation. Our data thus imply a relationship between strain rate and stress that is consistent with non-linear viscous flow, with n ≈ 3, but because the measurements are derived from slip along major crustal faults they do not represent deformation of a continuum. We know that, down-dip of the seismogenic part of active faults, cataclasis, hydrous alteration, and shear heating all contribute to grain size reduction and material weakening. These processes initiate localisation at the frictional-viscous transition and the development of mylonitic shear zones within the viscous regime. Furthermore, in quartzo-feldspathic crust, mylonites form a fabric of mineral segregated layers parallel to shear with their strength controlled by the weakest phase: quartz. Using a published flow law for wet quartz calibrated for mylonitic rocks to fit the strain rates across individual fault zones (~5 km wide), we estimate a lower bound on the temperature of the deforming material using our data. This temperature is reached at or just below the base of the seismogenic zone, as constrained by regional surface heat flow data and the depth distribution of crustal seismicity. We conclude that it is the rate of viscous flow in quartz-rich mylonitic shear zones, not distributed flow within the lower crust and/or upper mantle, which modulates the Holocene slip rates on the up-dip seismogenic part of the faults in this area. Our observations support the idea that the irregular, stick-slip movement of brittle faults, and hence earthquake recurrence, are ultimately modulated by down-dip viscous flow over multiple earthquake cycles.
Nature Geoscience; H... arrow_drop_down Nature Geoscience; Hal-DiderotArticle . 2013Hyper Article en Ligne; Hal-DiderotOther literature type . Conference object . 2013HAL-Rennes 1; Mémoires en Sciences de l'Information et de la CommunicationConference object . 2013add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 43 citations 43 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Nature Geoscience; H... arrow_drop_down Nature Geoscience; Hal-DiderotArticle . 2013Hyper Article en Ligne; Hal-DiderotOther literature type . Conference object . 2013HAL-Rennes 1; Mémoires en Sciences de l'Information et de la CommunicationConference object . 2013add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2012 FrancePublisher:American Geophysical Union (AGU) Nicolas Brantut; Alexandre Schubnel; Emmanuel C. David; Eva Héripré; Yves Guéguen; Alexandre Dimanov;doi: 10.1029/2011jb008730
Experimental heating tests were performed on Volterra gypsum to study the micromechanical consequences of the dehydration reaction. The experimental conditions were drained at 5 MPa fluid pressure and confining pressures ranging from 15 to 55 MPa. One test was performed with a constantly applied differential stress of 30 MPa. The reaction is marked by (1) a porosity increase and homogeneous compaction, (2) a swarm of acoustic emissions, (3) a large decrease in P and S wave velocities, and (4) a decrease in VP/VS ratio. Wave velocity data are interpreted in terms of crack density and pore aspect ratio, which, modeling pores as spheroids, is estimated at around 0.05 (crack‐like spheroid). Complementary tests performed in an environmental scanning electron microscope indicate that cracks first form inside the gypsum grains and are oriented preferentially along the crystal structure of gypsum. Most of the visible porosity appears at later stages when grains shrink and grain boundaries open. Extrapolation of our data to serpentinites in subduction zones suggest that the signature of dehydrating rocks in seismic tomography could be a low apparent Poisson's ratio, although this interpretation may be masked by anisotropy development due to preexisting crystal preferred orientation and/or deformation‐induced cracking. The large compaction and the absence of strain localization in the deformation test suggests that dehydrating rocks maybe seen as soft inclusions and could thus induce ruptures in the surrounding, nonreacting rocks.
HAL CY Cergy Paris U... arrow_drop_down Journal of Geophysical Research AtmospheresArticle . 2012 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 51 citations 51 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert HAL CY Cergy Paris U... arrow_drop_down Journal of Geophysical Research AtmospheresArticle . 2012 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2011jb008730&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Article 2015 Netherlands, France, FrancePublisher:American Geophysical Union (AGU) Funded by:EC | GEOCARBON, EC | MACC-III, UKRI | Amazon Integrated Carbon ... +1 projectsEC| GEOCARBON ,EC| MACC-III ,UKRI| Amazon Integrated Carbon Analysis / AMAZONICA ,NWO| The distribution and evolution of inert and reactant scalars: from the atmospheric boundary layer to continental scalesAuthors: I. T. van der Laan-Luijkx; I. R. van der Velde; Maarten Krol; Luciana V. Gatti; +10 AuthorsI. T. van der Laan-Luijkx; I. R. van der Velde; Maarten Krol; Luciana V. Gatti; Lucas G. Domingues; Caio S. C. Correia; John B. Miller; Manuel Gloor; T. T. van Leeuwen; Johannes W. Kaiser; Christine Wiedinmyer; Sourish Basu; Cathy Clerbaux; Wouter Peters;AbstractTwo major droughts in the past decade had large impacts on carbon exchange in the Amazon. Recent analysis of vertical profile measurements of atmospheric CO2 and CO by Gatti et al. (2014) suggests that the 2010 drought turned the normally close‐to‐neutral annual Amazon carbon balance into a substantial source of nearly 0.5 PgC/yr, revealing a strong drought response. In this study, we revisit this hypothesis and interpret not only the same CO2/CO vertical profile measurements but also additional constraints on carbon exchange such as satellite observations of CO, burned area, and fire hot spots. The results from our CarbonTracker South America data assimilation system suggest that carbon uptake by vegetation was indeed reduced in 2010 but that the magnitude of the decrease strongly depends on the estimated 2010 and 2011 biomass burning emissions. We have used fire products based on burned area (Global Fire Emissions Database version 4), satellite‐observed CO columns (Infrared Atmospheric Sounding Interferometer), fire radiative power (Global Fire Assimilation System version 1), and fire hot spots (Fire Inventory from NCAR version 1), and found an increase in biomass burning emissions in 2010 compared to 2011 of 0.16 to 0.24 PgC/yr. We derived a decrease of biospheric uptake ranging from 0.08 to 0.26 PgC/yr, with the range determined from a set of alternative inversions using different biomass burning estimates. Our numerical analysis of the 2010 Amazon drought results in a total reduction of carbon uptake of 0.24 to 0.50 PgC/yr and turns the balance from carbon sink to source. Our findings support the suggestion that the hydrological cycle will be an important driver of future changes in Amazonian carbon exchange.
NARCIS arrow_drop_down NARCISArticle . 2015Full-Text: https://pure.rug.nl/ws/files/66807317/Laan_Luijkx_et_al_2015_Global_Biogeochemical_Cycles.pdfData sources: NARCISCORE (RIOXX-UK Aggregator)Article . 2015Full-Text: https://eprints.whiterose.ac.uk/88214/7/Laan-Luijkx_et_al-2015-Global_Biogeochemical_Cycles.pdfData sources: CORE (RIOXX-UK Aggregator)Research@WUR; Global Biogeochemical CyclesOther literature type . Article . 2015 . Peer-reviewedLicense: Wiley Online Library User AgreementNARCISOther literature type . Article . 2015Mémoires en Sciences de l'Information et de la Communication; HAL-UPMCConference object . 2015add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2014gb005082&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 59 citations 59 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!visibility 5visibility views 5 download downloads 36 Powered bymore_vert NARCIS arrow_drop_down NARCISArticle . 2015Full-Text: https://pure.rug.nl/ws/files/66807317/Laan_Luijkx_et_al_2015_Global_Biogeochemical_Cycles.pdfData sources: NARCISCORE (RIOXX-UK Aggregator)Article . 2015Full-Text: https://eprints.whiterose.ac.uk/88214/7/Laan-Luijkx_et_al-2015-Global_Biogeochemical_Cycles.pdfData sources: CORE (RIOXX-UK Aggregator)Research@WUR; Global Biogeochemical CyclesOther literature type . Article . 2015 . Peer-reviewedLicense: Wiley Online Library User AgreementNARCISOther literature type . Article . 2015Mémoires en Sciences de l'Information et de la Communication; HAL-UPMCConference object . 2015add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2014gb005082&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2021 United Kingdom, France, FrancePublisher:The Royal Society Funded by:UKRI | The Global Methane Budget, UKRI | UAS-Methane: An unmanned ..., UKRI | Evaluation, Quantificatio...UKRI| The Global Methane Budget ,UKRI| UAS-Methane: An unmanned aerial system for the remote sensing of methane flux ,UKRI| Evaluation, Quantification and Identification of Pathways and Targets for the assessment of Shale Gas RISK (EQUIPT4RISK)Authors: Shaw, Jacob T.; Shah, Adil; Yong, Han; Allen, Grant;Shaw, Jacob T.; Shah, Adil; Yong, Han; Allen, Grant;Methane is an important greenhouse gas, emissions of which have vital consequences for global climate change. Understanding and quantifying the sources (and sinks) of atmospheric methane is integral for climate change mitigation and emission reduction strategies, such as those outlined in the 2015 UN Paris Agreement on Climate Change. There are ongoing international efforts to constrain the global methane budget, using a wide variety of measurement platforms across a range of spatial and temporal scales. The advancements in unmanned aerial vehicle (UAV) technology over the past decade have opened up a new avenue for methane emission quantification. UAVs can be uniquely equipped to monitor natural and anthropogenic emissions at local scales, displaying clear advantages in versatility and manoeuvrability relative to other platforms. Their use is not without challenge, however: further miniaturization of high-performance methane instrumentation is needed to fully use the benefits UAVs afford. Developments in the models used to simulate atmospheric transport and dispersion across small, local scales are also crucial to improved flux accuracy and precision. This paper aims to provide an overview of currently available UAV-based technologies and sampling methodologies which can be used to quantify methane emission fluxes at local scales.This article is part of a discussion meeting issue 'Rising methane: is warming feeding warming? (part 1)'.
Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2021Full-Text: http://europepmc.org/articles/PMC8473951Data sources: PubMed CentralPhilosophical Transactions of the Royal Society A Mathematical Physical and Engineering SciencesArticleLicense: CC BYData sources: UnpayWallThe University of Manchester - Institutional RepositoryArticle . 2021Data sources: The University of Manchester - Institutional RepositoryPhilosophical Transactions of the Royal Society A Mathematical Physical and Engineering SciencesArticle . 2021 . Peer-reviewedLicense: Royal Society Data Sharing and AccessibilityData sources: CrossrefMémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2021License: CC BYFull-Text: https://hal.science/hal-03434913/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1098/rsta.2020.0450&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 18 citations 18 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2021Full-Text: http://europepmc.org/articles/PMC8473951Data sources: PubMed CentralPhilosophical Transactions of the Royal Society A Mathematical Physical and Engineering SciencesArticleLicense: CC BYData sources: UnpayWallThe University of Manchester - Institutional RepositoryArticle . 2021Data sources: The University of Manchester - Institutional RepositoryPhilosophical Transactions of the Royal Society A Mathematical Physical and Engineering SciencesArticle . 2021 . Peer-reviewedLicense: Royal Society Data Sharing and AccessibilityData sources: CrossrefMémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2021License: CC BYFull-Text: https://hal.science/hal-03434913/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1098/rsta.2020.0450&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2011 Germany, Spain, France, France, France, SpainPublisher:American Geophysical Union (AGU) Alvarez, M.; Tanhua, T.; Brix, H.; Lo Monaco, C.; Metzl, N.; Mcdonagh, E. L.; Bryden, H. L.;doi: 10.1029/2010jc006475
handle: 10508/8156 , 10261/316390
Within the Subantarctic Mode Water (SAMW) density level, we study temporal changes in salinity, nutrients, oxygen and TTD (Transit Time Distribution) ages in the western (W) and eastern (E) subtropical gyre of the Indian Ocean (IO) from 1987 to 2002. Additionally, changes in Total Alkalinity (TA) and Dissolved Inorganic Carbon (DIC) are evaluated between 1995 and 2002. The mechanisms behind the detected changes are discussed along with the results from a hindcast model run (Community Climate System Model). The increasing salinity and decreasing oxygen trends from 1960 to 1987 reversed from 1987 to 2002 along the gyre. In the W-IO a decreasing trend in TTD ages points to a faster delivery of SAMW, thus less biogenic matter remineralization, explaining the oxygen increase and noisier nutrients decrease. In the E-IO SAMW, no change in TTD ages was detected, therefore the trends in oxygen and inorganic nutrients relate to changes in the Antarctic Surface Water transported into the E-IO SAMW formation area. In the W-IO between 1995 and 2002, the DIC increase is equal or even less than the anthropogenic input as the reduction in remineralization contributes to mask the increasing trend. In the E-IO between 1995 and 2002, DIC decreases slightly despite the increase in the anthropogenic input. Differences in the preformed E-IO SAMW conditions would explain this behavior. Trends in the W and E IO SAMW are decoupled and related to different forcing mechanisms in the two main sites of SAMW formation in the IO, at 40°S–70°E and 45°S–90°E, respectively. 3
OceanRep arrow_drop_down Repositorio Institucional Digital del IEOArticle . 2011License: CC BY NC NDData sources: Repositorio Institucional Digital del IEOArchiMer - Institutional Archive of IfremerOther literature type . 2011Data sources: ArchiMer - Institutional Archive of IfremerRecolector de Ciencia Abierta, RECOLECTAArticle . 2011License: CC BY NC NDData sources: Recolector de Ciencia Abierta, RECOLECTAJournal of Geophysical Research AtmospheresArticle . 2011 . Peer-reviewedLicense: Wiley TDMData sources: CrossrefHAL-IRD; Hal-DiderotArticle . 2011Mémoires en Sciences de l'Information et de la CommunicationArticle . 2011Full-Text: https://hal.science/hal-00758303/documentRecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2011 . 2014add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2010jc006475&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 12 citations 12 popularity Average influence Average impulse Top 10% Powered by BIP!visibility 4visibility views 4 Powered bymore_vert OceanRep arrow_drop_down Repositorio Institucional Digital del IEOArticle . 2011License: CC BY NC NDData sources: Repositorio Institucional Digital del IEOArchiMer - Institutional Archive of IfremerOther literature type . 2011Data sources: ArchiMer - Institutional Archive of IfremerRecolector de Ciencia Abierta, RECOLECTAArticle . 2011License: CC BY NC NDData sources: Recolector de Ciencia Abierta, RECOLECTAJournal of Geophysical Research AtmospheresArticle . 2011 . Peer-reviewedLicense: Wiley TDMData sources: CrossrefHAL-IRD; Hal-DiderotArticle . 2011Mémoires en Sciences de l'Information et de la CommunicationArticle . 2011Full-Text: https://hal.science/hal-00758303/documentRecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2011 . 2014add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2010jc006475&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2008 FrancePublisher:American Meteorological Society Authors: Iudicone, Daniele; Madec, Gurvan; Blanke, Bruno; Speich, Sabrina;Iudicone, Daniele; Madec, Gurvan; Blanke, Bruno; Speich, Sabrina;Abstract Despite the renewed interest in the Southern Ocean, there are yet many unknowns because of the scarcity of measurements and the complexity of the thermohaline circulation. Hence the authors present here the analysis of the thermohaline circulation of the Southern Ocean of a steady-state simulation of a coupled ice–ocean model. The study aims to clarify the roles of surface fluxes and internal mixing, with focus on the mechanisms of the upper branch of the overturning. A quantitative dynamical analysis of the water-mass transformation has been performed using a new method. Surface fluxes, including the effect of the penetrative solar radiation, produce almost 40 Sv (1 Sv ≡ 106 m3 s−1) of Subantarctic Mode Water while about 5 Sv of the densest water masses (γ > 28.2) are formed by brine rejection on the shelves of Antarctica and in the Weddell Sea. Mixing transforms one-half of the Subantarctic Mode Water into intermediate water and Upper Circumpolar Deep Water while bottom water is produced by Lower Circumpolar Deep Water and North Atlantic Deep Water mixing with shelf water. The upwelling of part of the North Atlantic Deep Water inflow is due to internal processes, mainly downward propagation of the surface freshwater excess via vertical mixing at the base of the mixed layer. A complementary Lagrangian analysis of the thermohaline circulation will be presented in a companion paper.
Journal of Physical ... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; HAL-CEA; HAL-IRD; HAL-UPMCArticle . 2008License: CC BYFull-Text: https://hal.science/hal-00308922/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1175/2008jpo3519.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routeshybrid 52 citations 52 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Journal of Physical ... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; HAL-CEA; HAL-IRD; HAL-UPMCArticle . 2008License: CC BYFull-Text: https://hal.science/hal-00308922/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1175/2008jpo3519.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2021 FrancePublisher:Mary Ann Liebert Inc Lucia Mandon; Adam Parkes Bowen; C. Quantin-Nataf; John Bridges; John Carter; Lu Pan; Pierre Beck; Erwin Dehouck; Matthieu Volat; Nicolas Thomas; Gabriele Cremonese; Livio L. Tornabene; Patrick Thollot;pmid: 33646016
International audience; The European Space Agency and Roscosmos' ExoMars rover mission, which is planned to land in the Oxia Planum region, will be dedicated to exobiology studies at the surface and subsurface of Mars. Oxia Planum is a clay-bearing site that has preserved evidence of long-term interaction with water during the Noachian era. Fe/Mg-rich phyllosilicates have previously been shown to occur extensively throughout the landing area. Here, we analyze data from the High Resolution Imaging Science Experiment (HiRISE) and from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instruments onboard NASA's Mars Reconnaissance Orbiter and the Colour and Stereo Surface Imaging System (CaSSIS) onboard ESA's Trace Gas Orbiter to characterize, at a high spatial resolution, the morphological and spectral variability of Oxia Planum's surface deposits. Two main types of bedrocks are identified within the clay-bearing, fractured unit observed throughout the landing site: (1) an orange type in HiRISE correlated with the strongest detections of secondary minerals (dominated by Fe/Mg-rich clay minerals) with, in some locations, an additional spectral absorption near 2.5 μm, suggesting the mixture with an additional mineral, plausibly carbonate or another type of clay mineral; (2) a more bluish bedrock associated with weaker detections of secondary minerals, which exhibits at certain locations a ∼1 μm broad absorption feature consistent with olivine. Coanalysis of the same terrains with the recently acquired CaSSIS images confirms the variability in the color and spectral properties of the fractured unit. Of interest for the ExoMars mission, both types of bedrocks are extensively outcropping in the Oxia Planum region, and the one corresponding to the most intense spectral signals of clay minerals (the primary scientific target) is well exposed within the landing area, including near its center.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1089/ast.2020.2292&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 33 citations 33 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1089/ast.2020.2292&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu