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description Publicationkeyboard_double_arrow_right Article , Other literature type , Contribution for newspaper or weekly magazine , Preprint 2021 Switzerland, United States, France, Sweden, Netherlands, France, FrancePublisher:Springer Science and Business Media LLC Funded by:EC | VORTEX, EC | EPICEC| VORTEX ,EC| EPICKevin Wagner; A. Boehle; Prashant Pathak; M. Kasper; Robin Arsenault; Gerd Jakob; U. Käufl; Serban Leveratto; Anne-Lise Maire; Eric Pantin; Ralf Siebenmorgen; Gérard Zins; Olivier Absil; Nancy Ageorges; Daniel Apai; Alexis Carlotti; Elodie Choquet; Christian Delacroix; Kjetil Dohlen; P. Duhoux; Pontus Forsberg; Eloy Fuenteseca; Sven Gutruf; O. Guyon; Elsa Huby; Dirk Kampf; Mikael Karlsson; Pierre Kervella; J. P. Kirchbauer; P. Klupar; Johann Kolb; D. Mawet; Mamadou N'Diaye; G. Orban de Xivry; Sascha P. Quanz; Arnd Reutlinger; Garreth Ruane; M. Riquelme; Christian Soenke; Michael Sterzik; Arthur Vigan; T. de Zeeuw;doi: 10.1038/s41467-021-21176-6 , 10.48550/arxiv.2102.05159 , 10.1038/s41467-021-23145-5 , 10.3929/ethz-b-000472101
pmc: PMC8099858 , PMC7876126
handle: 1887/3264074 , 20.500.11850/472101 , 1887/3273978
Giant exoplanets on wide orbits have been directly imaged around young stars. If the thermal background in the mid-infrared can be mitigated, then exoplanets with lower masses can also be imaged. Here we present a ground-based mid-infrared observing approach that enables imaging low-mass temperate exoplanets around nearby stars, and in particular within the closest stellar system, α Centauri. Based on 75–80% of the best quality images from 100 h of cumulative observations, we demonstrate sensitivity to warm sub-Neptune-sized planets throughout much of the habitable zone of α Centauri A. This is an order of magnitude more sensitive than state-of-the-art exoplanet imaging mass detection limits. We also discuss a possible exoplanet or exozodiacal disk detection around α Centauri A. However, an instrumental artifact of unknown origin cannot be ruled out. These results demonstrate the feasibility of imaging rocky habitable-zone exoplanets with current and upcoming telescopes. Nature Communications, 12 (1) ISSN:2041-1723
NARCIS arrow_drop_down Europe PubMed CentralArticle . 2021Full-Text: http://europepmc.org/articles/PMC8099858Data sources: PubMed CentralNature CommunicationsArticle . 2021 . Peer-reviewedFull-Text: http://europepmc.org/articles/PMC7876126Data sources: PubMed CentralLeiden University Scholarly Publications RepositoryOther literature type . 2021License: CC BYData sources: Leiden University Scholarly Publications Repositoryadd 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/s41467-021-21176-6&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 28 citations 28 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert NARCIS arrow_drop_down Europe PubMed CentralArticle . 2021Full-Text: http://europepmc.org/articles/PMC8099858Data sources: PubMed CentralNature CommunicationsArticle . 2021 . Peer-reviewedFull-Text: http://europepmc.org/articles/PMC7876126Data sources: PubMed CentralLeiden University Scholarly Publications RepositoryOther literature type . 2021License: CC BYData sources: Leiden University Scholarly Publications Repositoryadd 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/s41467-021-21176-6&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Preprint , Conference object , Article 2017 NetherlandsPublisher:IEEE Funded by:ARC | Discovery Projects - Gran..., ARC | A new airborne facility f..., EC | SEDALARC| Discovery Projects - Grant ID: DP140100572 ,ARC| A new airborne facility for environmental, hydrological, atmospheric and oceanic research: high resolution measurement of soil moisture, temperature and salinity ,EC| SEDALSabaghy, Sabah; Walker, Jeffrey; Renzullo, Luigi; Akbar, Ruzbeh; Chan, Steven; Chaubell, Julian; Das, Narendra; Dunbar, R. Scott; Entekhabi, Dara; Gevaert, Anouk; Jackson, Thomas; Merlin, Olivier; Moghaddam, Mahta; Peng, Jinzheng; Piepmeier, Jeffrey; Piles, Maria; Portal, Gerard; Rudiger, Christoph; Stefan, Vivien; Wu, Xiaoling; Ye, Nan; Yueh, Simon;Soil moisture impacts exchanges of water, energy and carbon fluxes between the land surface and the atmosphere. Passive microwave remote sensing at L-band can capture spatial and temporal patterns of soil moisture in the landscape. Both ESA and NASA have launched L-band radiometers, in the form of the SMOS and SMAP satellites respectively, to monitor soil moisture globally, every 3-day at about 40 km resolution. However, their coarse scale restricts the range of applications. While SMAP included an L-band radar to downscale the radiometer soil moisture to 9 km, the radar failed after 3 months and this initial approach is not applicable to developing a consistent long term soil moisture product across the two missions anymore. Existing optical-, radiometer-, and oversampling-based downscaling methods could be an alternative to the radar-based approach for delivering such data. Nevertheless, retrieval of a consistent high resolution soil moisture product remains a challenge, and there has been no comprehensive intercomparison of the alternate approaches. This research undertakes an assessment of the different downscaling approaches using the SMAPEx-4 field campaign data.
arXiv.org e-Print Ar... arrow_drop_down Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; NARCISContribution for newspaper or weekly magazine . Conference object . 2017https://doi.org/10.1109/igarss...Other literature type . Conference object . 2017 . Peer-reviewedadd 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=10.1109/igarss.2017.8127508&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert arXiv.org e-Print Ar... arrow_drop_down Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; NARCISContribution for newspaper or weekly magazine . Conference object . 2017https://doi.org/10.1109/igarss...Other literature type . Conference object . 2017 . Peer-reviewedadd 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=10.1109/igarss.2017.8127508&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Conference object 2017 Netherlands, France, United Kingdom, France, GermanyPublisher:Elsevier BV Sier, M.J.; Langereis, G.C.; Dupont-Nivet, G.; Feibel, C.S.; Joordens, J.C.A.; Van der Lubbe, H.J.L.; Beck, C.C.; Olago, D.; Cohen, A.; Sier; M.J.; van, der Lubbe H.J.L.; WTK, Science team members; WTK Science team members;International audience; One of the major challenges in understanding the evolution of our own species is identifying the role climate change has played in the evolution of hominin species. To clarify the influence of climate, we need long and continuous high-resolution paleoclimate records, preferably obtained from hominin-bearing sediments, that are well-dated by tephro- and magnetostratigraphy and other methods. This is hindered, however, by the fact that fossil-bearing outcrop sediments are often discontinuous, and subject to weathering, which may lead to oxidation and remagnetization. To obtain fresh, unweathered sediments, the Hominin Sites and Paleolakes Drilling Project (HSPDP) collected a ∼216-meter core (WTK13) in 2013 from Early Pleistocene Paleolake Lorenyang deposits in the western Turkana Basin (Kenya). Here, we present the magnetostratigraphy of the WTK13 core, providing a first age model for upcoming HSPDP paleoclimate and paleoenvrionmental studies on the core sediments. Rock magnetic analyses reveal the presence of iron sulfides carrying the remanent magnetizations. To recover polarity orientation from the near-equatorial WTK13 core drilled at 5°N, we developed and successfully applied two independent drill-core reorientation methods taking advantage of (1) the sedimentary fabric as expressed in the Anisotropy of Magnetic Susceptibility (AMS) and (2) the occurrence of a viscous component oriented in the present day field. The reoriented directions reveal a normal to reversed polarity reversal identified as the top of the Olduvai Subchron. From this excellent record, we find no evidence for the ‘Vrica Subchron’ previously reported in the area. We suggest that outcrop-based interpretations supporting the presence of the Vrica Subchron have been affected by the oxidation of iron sulfides initially present in the sediments -as evident in the core record- and by subsequent remagnetization. We discuss the implications of the observed geomagnetic record for human evolution studies.
Oxford University Re... arrow_drop_down Oxford University Research Archive; Quaternary Geochronology; NARCISOther literature type . Article . 2017 . Peer-reviewedLicense: Elsevier TDMNARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2017Publikationsserver der Universität PotsdamArticle . 2017Data sources: Publikationsserver der Universität Potsdamadd 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=10.1016/j.quageo.2017.08.004&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 17 citations 17 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 3visibility views 3 Powered bymore_vert Oxford University Re... arrow_drop_down Oxford University Research Archive; Quaternary Geochronology; NARCISOther literature type . Article . 2017 . Peer-reviewedLicense: Elsevier TDMNARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2017Publikationsserver der Universität PotsdamArticle . 2017Data sources: Publikationsserver der Universität Potsdamadd 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=10.1016/j.quageo.2017.08.004&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type , Contribution for newspaper or weekly magazine 2016 NetherlandsPublisher:Society of Exploration Geophysicists Funded by:NWO | Nonlinear Dynamics of Nat...NWO| Nonlinear Dynamics of Natural Systems (NDNS+)Kadu, A.; van Leeuwen, T.; Mulder, W.A.; Sub Fundamental Mathematics; Sub Mathematical Modeling; Fundamental mathematics; Mathematical Modeling;handle: 1874/340533
In seismic exploration, the delineation of large bodies with hard exterior contrasts but nearly constant interior properties is a challenge. Examples include salt diapirs, salt slabs, anhydrite or basalt layers. Salt geometries are of particular interest because they often have hydrocarbon reservoirs on their sides or underneath. This papers introduces a parametric level-set method for the reconstruction of such geometries in seismic full-waveform inversion (FWI). The level-set determines the outline of the salt geometry and evolves during the inversion in terms of its underlying parameters. For the latter, we employ Gaussian radial basis functions that can represent a large class of shapes with a small number of parameters. This keeps the dimensionality of the inverse problem small, which makes it easier to solve. First tests on a simple 2-D square box model show dramatic improvements over classic FWI. Applied Geophysics and Petrophysics
NARCIS; TU Delft Rep... arrow_drop_down NARCIS; TU Delft RepositoryConference object . 2016NARCIS; Utrecht University RepositoryContribution for newspaper or weekly magazine . 2016add 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=10.1190/segam2016-13870276.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu15 citations 15 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 219visibility views 219 download downloads 55 Powered bymore_vert NARCIS; TU Delft Rep... arrow_drop_down NARCIS; TU Delft RepositoryConference object . 2016NARCIS; Utrecht University RepositoryContribution for newspaper or weekly magazine . 2016add 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=10.1190/segam2016-13870276.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Article 2019 NetherlandsPublisher:European Association of Geoscientists & Engineers Dearing Crampton-Flood, E.; Smits, D.; Van Der Molen, G.; Noorbergen, L. J.; Lourens, L.; Munsterman, D.; Van Der Weijst, C.; Donders, Timme; Peterse, F.; Sinninghe Damsté, J. S.;The Mid-Piacenzian Warm Period (mPWP, ca. 3.3-3.0 Ma) is a frequently targeted interval
NARCIS; TNO Reposito... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2019add 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=10.3997/2214-4609.201902854&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert NARCIS; TNO Reposito... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2019add 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=10.3997/2214-4609.201902854&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Conference object 2016 NetherlandsPublisher:American Geophysical Union (AGU) Authors: Bryan C Lougheed; H.J.L. van der Lubbe; Gareth Davies;Bryan C Lougheed; H.J.L. van der Lubbe; Gareth Davies;AbstractAccurate geochronologies are crucial for reconstructing the sensitivity of brackish and estuarine environments to dynamic external impacts of the past. Radiocarbon (14C) dating is commonly used for palaeoclimate studies, but its application in brackish environments is severely limited by an inability to quantify spatiotemporal variations in 14C reservoir age, or R(t), due to dynamic interplay between river runoff and marine water. Additionally, old carbon effects and species‐specific behavioral processes also influence 14C ages. Using the world's largest brackish water body (the estuarine Baltic Sea) as a test bed, combined with a comprehensive approach that objectively excludes both old carbon (using GIS) and species‐specific 14C effects, we demonstrate the use of 87Sr/86Sr ratios for quantifying R(t) in ubiquitous mollusc shell material, leading to almost an order of magnitude increase in Baltic Sea 14C geochronological precision over the current state of the art. We propose that similar proxy methods can be developed for other brackish water bodies worldwide.
Geophysical Research... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2016Geophysical Research LettersArticle . 2016 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: CrossrefGeophysical Research LettersArticle . 2016add 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=10.1002/2015gl066983&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 7 citations 7 popularity Average influence Average impulse Average Powered by BIP!more_vert Geophysical Research... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2016Geophysical Research LettersArticle . 2016 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: CrossrefGeophysical Research LettersArticle . 2016add 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=10.1002/2015gl066983&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type 2020 Netherlands, SwitzerlandPublisher:Copernicus GmbH Lisa Bröder; Kirsi Keskitalo; Scott Zolkos; Sarah Shakil; Suzanne E. Tank; Tommaso Tesi; Bart E. van Dongen; Negar Haghipour; Timothy I. Eglinton; Jorien E. Vonk;<p>The Peel Plateau in northwestern Canada hosts some of the fastest growing &#8220;mega slumps&#8221;, retrogressive thaw slumps exceeding 2000 m<sup>2</sup> in area. The region is located at the former margin of the Laurentide ice sheet and its landscape is dominated by ice-rich hummocky moraines. Rapid permafrost thaw resulting from enhanced warming and increases in summer precipitation has been identified as a major driver of sediment mobilization in the area, with some of the largest slumps relocating up to 10<sup>6</sup> m<sup>3</sup> of previously frozen sediments into fluvial networks. The biogeochemical transformation of this thawed substrate within fluvial networks may represent a source of CO<sub>2</sub> to the atmosphere and have a large impact on downstream ecosystems, yet its fate is currently unclear. Concentrations of dissolved organic matter are lowered in slump-impacted streams, while the particle loads increase. Here, we aim to characterize the mobilized material and its sources by analyzing active layer, Holocene and Pleistocene permafrost, debris (recently thawed, still at the headwall) and slump outflow samples from four different slumps on the Peel Plateau. We use sediment properties (mineral surface area, grain size distribution), carbon isotopes (<sup>13</sup>C, <sup>14</sup>C) and molecular markers (solvent-extractable lipids, lignin phenols, cutin acids, non-extractable compound classes analyzed by pyrolysis-GCMS) in order to assess the composition and quality of the mobilized sediment and organic matter and thereby improve our understanding of their fate and downstream effects. Preliminary results show that organic matter content and radiocarbon age in debris and outflow from all four slumps are dominantly derived from Holocene and Pleistocene permafrost soils with a smaller influence of the organic-rich active layer. Degradation proxies based on extractable lipid and lignin biomarkers suggest Holocene and Pleistocene permafrost organic matter to be more matured than the fresh plant material found in the active layer, while debris and outflow samples show a mixed signal. For the non-extractable organic matter, aromatics and phenols make up the largest fraction of all samples. Lignin markers are almost exclusively found in the active layer samples, which also contain a larger proportion of polysaccharides, while N-containing compounds and alkanes make up the remaining 2-25 % with no obvious patterns. Active layer soils also have the highest median grain sizes, whereas Pleistocene permafrost soils consist of much finer mineral grains. Samples collected at the slump outflow are significantly more homogeneous (i.e., showing a narrower grain size distribution) than any of the other samples. We thus infer that both organic matter degradation and hydrodynamic sorting during transport play a role within these slump features; determining their relative magnitudes will be crucial to better assess potential feedbacks of these increasingly abundant &#8220;mega slumps&#8221; to changing climate.</p>
NARCIS; Vrije Univer... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2020add 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/egusphere-egu2020-7176&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert NARCIS; Vrije Univer... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2020add 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/egusphere-egu2020-7176&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Conference object 2001 NetherlandsPublisher:Cambridge University Press (CUP) Authors: van de Plassche, O.; Edwards, R.J.; van de Borg, K.; Jong, A.F.M.;van de Plassche, O.; Edwards, R.J.; van de Borg, K.; Jong, A.F.M.;Comparison of two sets of marsh-accumulation records from each of three Connecticut (USA) salt marshes, one based on individually calibrated dates and the other on wiggle-match dating of the same series of dates, shows that wiggle-match dating results in more precise and objective reconstructions of longer-term (102–103 yr) changes in accumulation rate. On (sub-)century time scales, wiggle-match dating can reveal steps in the calibrated marsh-accumulation envelope as artefacts of the calibration curve, but may also leave real short-term changes in accumulation rate undetected. Wiggle-matches are non-unique, being dependent on the number, quality and distribution of radiocarbon dates in a sequence, how a series of dates is subdivided into groups (representing intervals of uniform accumulation rate), and what is considered a “best match”. Samples from the studied salt-marsh deposits required no correction for reservoir effects prior to calibration.
Radiocarbon arrow_drop_down Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research Portal; NARCISContribution for newspaper or weekly magazine . Conference object . 2001NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional RepositoryConference object . 2001RadiocarbonArticle . 2001 . Peer-reviewedLicense: Cambridge Core 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=10.1017/s003382220003825x&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 17 citations 17 popularity Average influence Top 10% impulse Average Powered by BIP!more_vert Radiocarbon arrow_drop_down Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research Portal; NARCISContribution for newspaper or weekly magazine . Conference object . 2001NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional RepositoryConference object . 2001RadiocarbonArticle . 2001 . Peer-reviewedLicense: Cambridge Core 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.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Contribution for newspaper or weekly magazine , Other literature type 2022 NetherlandsPublisher:Copernicus GmbH Funded by:EC | ASICA, EC | COS-OCS, NWO | Trend and Variability in ... +1 projectsEC| ASICA ,EC| COS-OCS ,NWO| Trend and Variability in the atmospheric Oxidizing Capacity (TAVOC) ,NWO| Lungs of the earth: measuring oxygen to unravel the forest carbon balanceS. Naus; S. Naus; L. G. Domingues; L. G. Domingues; M. Krol; M. Krol; I. T. Luijkx; L. V. Gatti; L. V. Gatti; J. B. Miller; E. Gloor; S. Basu; S. Basu; C. Correia; C. Correia; G. Koren; H. M. Worden; J. Flemming; G. Pétron; G. Pétron; W. Peters; W. Peters;Abstract. Despite the consensus on the overall downward trend in Amazon forest loss in the previous decade, estimates of yearly carbon emissions from deforestation still vary widely. Estimated carbon emissions are currently often based on data from local logging activity reports, changes in remotely sensed biomass, and remote detection of fire hotspots and burned area. Here, we use 16 years of satellite-derived carbon monoxide (CO) columns to constrain fire CO emissions from the Amazon Basin between 2003 and 2018. Through data assimilation, we produce 3 d average maps of fire CO emissions over the Amazon, which we verified to be consistent with a long-term monitoring programme of aircraft CO profiles over five sites in the Amazon. Our new product independently confirms a long-term decrease of 54 % in deforestation-related CO emissions over the study period. Interannual variability is large, with known anomalously dry years showing a more than 4-fold increase in basin-wide fire emissions relative to wet years. At the level of individual Brazilian states, we find that both soil moisture anomalies and human ignitions determine fire activity, suggesting that future carbon release from fires depends on drought intensity as much as on continued forest protection. Our study shows that the atmospheric composition perspective on deforestation is a valuable additional monitoring instrument that complements existing bottom-up and remote sensing methods for land-use change. Extension of such a perspective to an operational framework is timely considering the observed increased fire intensity in the Amazon Basin between 2019 and 2021.
NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2022Research@WUR; Atmospheric Chemistry and Physics (ACP); Atmospheric Chemistry and PhysicsOther literature type . Article . 2022 . Peer-reviewedLicense: CC BYUtrecht University RepositoryContribution for newspaper or weekly magazine . 2022Data sources: Utrecht University RepositoryAtmospheric Chemistry and PhysicsArticle . 2022Atmospheric Chemistry and Physics (ACP)Other literature type . 2022Data sources: Copernicus Publicationsadd 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 4 citations 4 popularity Top 10% influence Average impulse Average Powered by BIP!more_vert NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2022Research@WUR; Atmospheric Chemistry and Physics (ACP); Atmospheric Chemistry and PhysicsOther literature type . Article . 2022 . Peer-reviewedLicense: CC BYUtrecht University RepositoryContribution for newspaper or weekly magazine . 2022Data sources: Utrecht University RepositoryAtmospheric Chemistry and PhysicsArticle . 2022Atmospheric Chemistry and Physics (ACP)Other literature type . 2022Data sources: Copernicus Publicationsadd 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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description Publicationkeyboard_double_arrow_right Article , Other literature type , Contribution for newspaper or weekly magazine , Preprint 2021 Switzerland, United States, France, Sweden, Netherlands, France, FrancePublisher:Springer Science and Business Media LLC Funded by:EC | VORTEX, EC | EPICEC| VORTEX ,EC| EPICKevin Wagner; A. Boehle; Prashant Pathak; M. Kasper; Robin Arsenault; Gerd Jakob; U. Käufl; Serban Leveratto; Anne-Lise Maire; Eric Pantin; Ralf Siebenmorgen; Gérard Zins; Olivier Absil; Nancy Ageorges; Daniel Apai; Alexis Carlotti; Elodie Choquet; Christian Delacroix; Kjetil Dohlen; P. Duhoux; Pontus Forsberg; Eloy Fuenteseca; Sven Gutruf; O. Guyon; Elsa Huby; Dirk Kampf; Mikael Karlsson; Pierre Kervella; J. P. Kirchbauer; P. Klupar; Johann Kolb; D. Mawet; Mamadou N'Diaye; G. Orban de Xivry; Sascha P. Quanz; Arnd Reutlinger; Garreth Ruane; M. Riquelme; Christian Soenke; Michael Sterzik; Arthur Vigan; T. de Zeeuw;doi: 10.1038/s41467-021-21176-6 , 10.48550/arxiv.2102.05159 , 10.1038/s41467-021-23145-5 , 10.3929/ethz-b-000472101
pmc: PMC8099858 , PMC7876126
handle: 1887/3264074 , 20.500.11850/472101 , 1887/3273978
Giant exoplanets on wide orbits have been directly imaged around young stars. If the thermal background in the mid-infrared can be mitigated, then exoplanets with lower masses can also be imaged. Here we present a ground-based mid-infrared observing approach that enables imaging low-mass temperate exoplanets around nearby stars, and in particular within the closest stellar system, α Centauri. Based on 75–80% of the best quality images from 100 h of cumulative observations, we demonstrate sensitivity to warm sub-Neptune-sized planets throughout much of the habitable zone of α Centauri A. This is an order of magnitude more sensitive than state-of-the-art exoplanet imaging mass detection limits. We also discuss a possible exoplanet or exozodiacal disk detection around α Centauri A. However, an instrumental artifact of unknown origin cannot be ruled out. These results demonstrate the feasibility of imaging rocky habitable-zone exoplanets with current and upcoming telescopes. Nature Communications, 12 (1) ISSN:2041-1723
NARCIS arrow_drop_down Europe PubMed CentralArticle . 2021Full-Text: http://europepmc.org/articles/PMC8099858Data sources: PubMed CentralNature CommunicationsArticle . 2021 . Peer-reviewedFull-Text: http://europepmc.org/articles/PMC7876126Data sources: PubMed CentralLeiden University Scholarly Publications RepositoryOther literature type . 2021License: CC BYData sources: Leiden University Scholarly Publications Repositoryadd 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 RoutesGreen gold 28 citations 28 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert NARCIS arrow_drop_down Europe PubMed CentralArticle . 2021Full-Text: http://europepmc.org/articles/PMC8099858Data sources: PubMed CentralNature CommunicationsArticle . 2021 . Peer-reviewedFull-Text: http://europepmc.org/articles/PMC7876126Data sources: PubMed CentralLeiden University Scholarly Publications RepositoryOther literature type . 2021License: CC BYData sources: Leiden University Scholarly Publications Repositoryadd 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/s41467-021-21176-6&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Preprint , Conference object , Article 2017 NetherlandsPublisher:IEEE Funded by:ARC | Discovery Projects - Gran..., ARC | A new airborne facility f..., EC | SEDALARC| Discovery Projects - Grant ID: DP140100572 ,ARC| A new airborne facility for environmental, hydrological, atmospheric and oceanic research: high resolution measurement of soil moisture, temperature and salinity ,EC| SEDALSabaghy, Sabah; Walker, Jeffrey; Renzullo, Luigi; Akbar, Ruzbeh; Chan, Steven; Chaubell, Julian; Das, Narendra; Dunbar, R. Scott; Entekhabi, Dara; Gevaert, Anouk; Jackson, Thomas; Merlin, Olivier; Moghaddam, Mahta; Peng, Jinzheng; Piepmeier, Jeffrey; Piles, Maria; Portal, Gerard; Rudiger, Christoph; Stefan, Vivien; Wu, Xiaoling; Ye, Nan; Yueh, Simon;Soil moisture impacts exchanges of water, energy and carbon fluxes between the land surface and the atmosphere. Passive microwave remote sensing at L-band can capture spatial and temporal patterns of soil moisture in the landscape. Both ESA and NASA have launched L-band radiometers, in the form of the SMOS and SMAP satellites respectively, to monitor soil moisture globally, every 3-day at about 40 km resolution. However, their coarse scale restricts the range of applications. While SMAP included an L-band radar to downscale the radiometer soil moisture to 9 km, the radar failed after 3 months and this initial approach is not applicable to developing a consistent long term soil moisture product across the two missions anymore. Existing optical-, radiometer-, and oversampling-based downscaling methods could be an alternative to the radar-based approach for delivering such data. Nevertheless, retrieval of a consistent high resolution soil moisture product remains a challenge, and there has been no comprehensive intercomparison of the alternate approaches. This research undertakes an assessment of the different downscaling approaches using the SMAPEx-4 field campaign data.
arXiv.org e-Print Ar... arrow_drop_down Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; NARCISContribution for newspaper or weekly magazine . Conference object . 2017https://doi.org/10.1109/igarss...Other literature type . Conference object . 2017 . Peer-reviewedadd 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 RoutesGreen 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert arXiv.org e-Print Ar... arrow_drop_down Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; NARCISContribution for newspaper or weekly magazine . Conference object . 2017https://doi.org/10.1109/igarss...Other literature type . Conference object . 2017 . Peer-reviewedadd 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=10.1109/igarss.2017.8127508&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Conference object 2017 Netherlands, France, United Kingdom, France, GermanyPublisher:Elsevier BV Sier, M.J.; Langereis, G.C.; Dupont-Nivet, G.; Feibel, C.S.; Joordens, J.C.A.; Van der Lubbe, H.J.L.; Beck, C.C.; Olago, D.; Cohen, A.; Sier; M.J.; van, der Lubbe H.J.L.; WTK, Science team members; WTK Science team members;International audience; One of the major challenges in understanding the evolution of our own species is identifying the role climate change has played in the evolution of hominin species. To clarify the influence of climate, we need long and continuous high-resolution paleoclimate records, preferably obtained from hominin-bearing sediments, that are well-dated by tephro- and magnetostratigraphy and other methods. This is hindered, however, by the fact that fossil-bearing outcrop sediments are often discontinuous, and subject to weathering, which may lead to oxidation and remagnetization. To obtain fresh, unweathered sediments, the Hominin Sites and Paleolakes Drilling Project (HSPDP) collected a ∼216-meter core (WTK13) in 2013 from Early Pleistocene Paleolake Lorenyang deposits in the western Turkana Basin (Kenya). Here, we present the magnetostratigraphy of the WTK13 core, providing a first age model for upcoming HSPDP paleoclimate and paleoenvrionmental studies on the core sediments. Rock magnetic analyses reveal the presence of iron sulfides carrying the remanent magnetizations. To recover polarity orientation from the near-equatorial WTK13 core drilled at 5°N, we developed and successfully applied two independent drill-core reorientation methods taking advantage of (1) the sedimentary fabric as expressed in the Anisotropy of Magnetic Susceptibility (AMS) and (2) the occurrence of a viscous component oriented in the present day field. The reoriented directions reveal a normal to reversed polarity reversal identified as the top of the Olduvai Subchron. From this excellent record, we find no evidence for the ‘Vrica Subchron’ previously reported in the area. We suggest that outcrop-based interpretations supporting the presence of the Vrica Subchron have been affected by the oxidation of iron sulfides initially present in the sediments -as evident in the core record- and by subsequent remagnetization. We discuss the implications of the observed geomagnetic record for human evolution studies.
Oxford University Re... arrow_drop_down Oxford University Research Archive; Quaternary Geochronology; NARCISOther literature type . Article . 2017 . Peer-reviewedLicense: Elsevier TDMNARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2017Publikationsserver der Universität PotsdamArticle . 2017Data sources: Publikationsserver der Universität Potsdamadd 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=10.1016/j.quageo.2017.08.004&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 17 citations 17 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 3visibility views 3 Powered bymore_vert Oxford University Re... arrow_drop_down Oxford University Research Archive; Quaternary Geochronology; NARCISOther literature type . Article . 2017 . Peer-reviewedLicense: Elsevier TDMNARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2017Publikationsserver der Universität PotsdamArticle . 2017Data sources: Publikationsserver der Universität Potsdamadd 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=10.1016/j.quageo.2017.08.004&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type , Contribution for newspaper or weekly magazine 2016 NetherlandsPublisher:Society of Exploration Geophysicists Funded by:NWO | Nonlinear Dynamics of Nat...NWO| Nonlinear Dynamics of Natural Systems (NDNS+)Kadu, A.; van Leeuwen, T.; Mulder, W.A.; Sub Fundamental Mathematics; Sub Mathematical Modeling; Fundamental mathematics; Mathematical Modeling;handle: 1874/340533
In seismic exploration, the delineation of large bodies with hard exterior contrasts but nearly constant interior properties is a challenge. Examples include salt diapirs, salt slabs, anhydrite or basalt layers. Salt geometries are of particular interest because they often have hydrocarbon reservoirs on their sides or underneath. This papers introduces a parametric level-set method for the reconstruction of such geometries in seismic full-waveform inversion (FWI). The level-set determines the outline of the salt geometry and evolves during the inversion in terms of its underlying parameters. For the latter, we employ Gaussian radial basis functions that can represent a large class of shapes with a small number of parameters. This keeps the dimensionality of the inverse problem small, which makes it easier to solve. First tests on a simple 2-D square box model show dramatic improvements over classic FWI. Applied Geophysics and Petrophysics
NARCIS; TU Delft Rep... arrow_drop_down NARCIS; TU Delft RepositoryConference object . 2016NARCIS; Utrecht University RepositoryContribution for newspaper or weekly magazine . 2016add 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=10.1190/segam2016-13870276.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu15 citations 15 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 219visibility views 219 download downloads 55 Powered bymore_vert NARCIS; TU Delft Rep... arrow_drop_down NARCIS; TU Delft RepositoryConference object . 2016NARCIS; Utrecht University RepositoryContribution for newspaper or weekly magazine . 2016add 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=10.1190/segam2016-13870276.1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Article 2019 NetherlandsPublisher:European Association of Geoscientists & Engineers Dearing Crampton-Flood, E.; Smits, D.; Van Der Molen, G.; Noorbergen, L. J.; Lourens, L.; Munsterman, D.; Van Der Weijst, C.; Donders, Timme; Peterse, F.; Sinninghe Damsté, J. S.;The Mid-Piacenzian Warm Period (mPWP, ca. 3.3-3.0 Ma) is a frequently targeted interval
NARCIS; TNO Reposito... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2019add 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=10.3997/2214-4609.201902854&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert NARCIS; TNO Reposito... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2019add 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=10.3997/2214-4609.201902854&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Conference object 2016 NetherlandsPublisher:American Geophysical Union (AGU) Authors: Bryan C Lougheed; H.J.L. van der Lubbe; Gareth Davies;Bryan C Lougheed; H.J.L. van der Lubbe; Gareth Davies;AbstractAccurate geochronologies are crucial for reconstructing the sensitivity of brackish and estuarine environments to dynamic external impacts of the past. Radiocarbon (14C) dating is commonly used for palaeoclimate studies, but its application in brackish environments is severely limited by an inability to quantify spatiotemporal variations in 14C reservoir age, or R(t), due to dynamic interplay between river runoff and marine water. Additionally, old carbon effects and species‐specific behavioral processes also influence 14C ages. Using the world's largest brackish water body (the estuarine Baltic Sea) as a test bed, combined with a comprehensive approach that objectively excludes both old carbon (using GIS) and species‐specific 14C effects, we demonstrate the use of 87Sr/86Sr ratios for quantifying R(t) in ubiquitous mollusc shell material, leading to almost an order of magnitude increase in Baltic Sea 14C geochronological precision over the current state of the art. We propose that similar proxy methods can be developed for other brackish water bodies worldwide.
Geophysical Research... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2016Geophysical Research LettersArticle . 2016 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: CrossrefGeophysical Research LettersArticle . 2016add 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=10.1002/2015gl066983&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 7 citations 7 popularity Average influence Average impulse Average Powered by BIP!more_vert Geophysical Research... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2016Geophysical Research LettersArticle . 2016 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: CrossrefGeophysical Research LettersArticle . 2016add 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=10.1002/2015gl066983&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type 2020 Netherlands, SwitzerlandPublisher:Copernicus GmbH Lisa Bröder; Kirsi Keskitalo; Scott Zolkos; Sarah Shakil; Suzanne E. Tank; Tommaso Tesi; Bart E. van Dongen; Negar Haghipour; Timothy I. Eglinton; Jorien E. Vonk;<p>The Peel Plateau in northwestern Canada hosts some of the fastest growing &#8220;mega slumps&#8221;, retrogressive thaw slumps exceeding 2000 m<sup>2</sup> in area. The region is located at the former margin of the Laurentide ice sheet and its landscape is dominated by ice-rich hummocky moraines. Rapid permafrost thaw resulting from enhanced warming and increases in summer precipitation has been identified as a major driver of sediment mobilization in the area, with some of the largest slumps relocating up to 10<sup>6</sup> m<sup>3</sup> of previously frozen sediments into fluvial networks. The biogeochemical transformation of this thawed substrate within fluvial networks may represent a source of CO<sub>2</sub> to the atmosphere and have a large impact on downstream ecosystems, yet its fate is currently unclear. Concentrations of dissolved organic matter are lowered in slump-impacted streams, while the particle loads increase. Here, we aim to characterize the mobilized material and its sources by analyzing active layer, Holocene and Pleistocene permafrost, debris (recently thawed, still at the headwall) and slump outflow samples from four different slumps on the Peel Plateau. We use sediment properties (mineral surface area, grain size distribution), carbon isotopes (<sup>13</sup>C, <sup>14</sup>C) and molecular markers (solvent-extractable lipids, lignin phenols, cutin acids, non-extractable compound classes analyzed by pyrolysis-GCMS) in order to assess the composition and quality of the mobilized sediment and organic matter and thereby improve our understanding of their fate and downstream effects. Preliminary results show that organic matter content and radiocarbon age in debris and outflow from all four slumps are dominantly derived from Holocene and Pleistocene permafrost soils with a smaller influence of the organic-rich active layer. Degradation proxies based on extractable lipid and lignin biomarkers suggest Holocene and Pleistocene permafrost organic matter to be more matured than the fresh plant material found in the active layer, while debris and outflow samples show a mixed signal. For the non-extractable organic matter, aromatics and phenols make up the largest fraction of all samples. Lignin markers are almost exclusively found in the active layer samples, which also contain a larger proportion of polysaccharides, while N-containing compounds and alkanes make up the remaining 2-25 % with no obvious patterns. Active layer soils also have the highest median grain sizes, whereas Pleistocene permafrost soils consist of much finer mineral grains. Samples collected at the slump outflow are significantly more homogeneous (i.e., showing a narrower grain size distribution) than any of the other samples. We thus infer that both organic matter degradation and hydrodynamic sorting during transport play a role within these slump features; determining their relative magnitudes will be crucial to better assess potential feedbacks of these increasingly abundant &#8220;mega slumps&#8221; to changing climate.</p>
NARCIS; Vrije Univer... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2020add 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/egusphere-egu2020-7176&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert NARCIS; Vrije Univer... arrow_drop_down NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research PortalContribution for newspaper or weekly magazine . Conference object . 2020add 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/egusphere-egu2020-7176&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Conference object 2001 NetherlandsPublisher:Cambridge University Press (CUP) Authors: van de Plassche, O.; Edwards, R.J.; van de Borg, K.; Jong, A.F.M.;van de Plassche, O.; Edwards, R.J.; van de Borg, K.; Jong, A.F.M.;Comparison of two sets of marsh-accumulation records from each of three Connecticut (USA) salt marshes, one based on individually calibrated dates and the other on wiggle-match dating of the same series of dates, shows that wiggle-match dating results in more precise and objective reconstructions of longer-term (102–103 yr) changes in accumulation rate. On (sub-)century time scales, wiggle-match dating can reveal steps in the calibrated marsh-accumulation envelope as artefacts of the calibration curve, but may also leave real short-term changes in accumulation rate undetected. Wiggle-matches are non-unique, being dependent on the number, quality and distribution of radiocarbon dates in a sequence, how a series of dates is subdivided into groups (representing intervals of uniform accumulation rate), and what is considered a “best match”. Samples from the studied salt-marsh deposits required no correction for reservoir effects prior to calibration.
Radiocarbon arrow_drop_down Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research Portal; NARCISContribution for newspaper or weekly magazine . Conference object . 2001NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional RepositoryConference object . 2001RadiocarbonArticle . 2001 . Peer-reviewedLicense: Cambridge Core 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=10.1017/s003382220003825x&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 17 citations 17 popularity Average influence Top 10% impulse Average Powered by BIP!more_vert Radiocarbon arrow_drop_down Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional Repository; Vrije Universiteit Amsterdam (VU Amsterdam) – Research Portal; NARCISContribution for newspaper or weekly magazine . Conference object . 2001NARCIS; Vrije Universiteit Amsterdam (VU Amsterdam) - Institutional RepositoryConference object . 2001RadiocarbonArticle . 2001 . Peer-reviewedLicense: Cambridge Core 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=10.1017/s003382220003825x&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Contribution for newspaper or weekly magazine , Other literature type 2022 NetherlandsPublisher:Copernicus GmbH Funded by:EC | ASICA, EC | COS-OCS, NWO | Trend and Variability in ... +1 projectsEC| ASICA ,EC| COS-OCS ,NWO| Trend and Variability in the atmospheric Oxidizing Capacity (TAVOC) ,NWO| Lungs of the earth: measuring oxygen to unravel the forest carbon balanceS. Naus; S. Naus; L. G. Domingues; L. G. Domingues; M. Krol; M. Krol; I. T. Luijkx; L. V. Gatti; L. V. Gatti; J. B. Miller; E. Gloor; S. Basu; S. Basu; C. Correia; C. Correia; G. Koren; H. M. Worden; J. Flemming; G. Pétron; G. Pétron; W. Peters; W. Peters;Abstract. Despite the consensus on the overall downward trend in Amazon forest loss in the previous decade, estimates of yearly carbon emissions from deforestation still vary widely. Estimated carbon emissions are currently often based on data from local logging activity reports, changes in remotely sensed biomass, and remote detection of fire hotspots and burned area. Here, we use 16 years of satellite-derived carbon monoxide (CO) columns to constrain fire CO emissions from the Amazon Basin between 2003 and 2018. Through data assimilation, we produce 3 d average maps of fire CO emissions over the Amazon, which we verified to be consistent with a long-term monitoring programme of aircraft CO profiles over five sites in the Amazon. Our new product independently confirms a long-term decrease of 54 % in deforestation-related CO emissions over the study period. Interannual variability is large, with known anomalously dry years showing a more than 4-fold increase in basin-wide fire emissions relative to wet years. At the level of individual Brazilian states, we find that both soil moisture anomalies and human ignitions determine fire activity, suggesting that future carbon release from fires depends on drought intensity as much as on continued forest protection. Our study shows that the atmospheric composition perspective on deforestation is a valuable additional monitoring instrument that complements existing bottom-up and remote sensing methods for land-use change. Extension of such a perspective to an operational framework is timely considering the observed increased fire intensity in the Amazon Basin between 2019 and 2021.
NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2022Research@WUR; Atmospheric Chemistry and Physics (ACP); Atmospheric Chemistry and PhysicsOther literature type . Article . 2022 . Peer-reviewedLicense: CC BYUtrecht University RepositoryContribution for newspaper or weekly magazine . 2022Data sources: Utrecht University RepositoryAtmospheric Chemistry and PhysicsArticle . 2022Atmospheric Chemistry and Physics (ACP)Other literature type . 2022Data sources: Copernicus Publicationsadd 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/egusphere-2022-450&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 4 citations 4 popularity Top 10% influence Average impulse Average Powered by BIP!more_vert NARCIS; Utrecht Univ... arrow_drop_down NARCIS; Utrecht University RepositoryArticle . 2022Research@WUR; Atmospheric Chemistry and Physics (ACP); Atmospheric Chemistry and PhysicsOther literature type . Article . 2022 . Peer-reviewedLicense: CC BYUtrecht University RepositoryContribution for newspaper or weekly magazine . 2022Data sources: Utrecht University RepositoryAtmospheric Chemistry and PhysicsArticle . 2022Atmospheric Chemistry and Physics (ACP)Other literature type . 2022Data sources: Copernicus Publicationsadd 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/egusphere-2022-450&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu