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description Publicationkeyboard_double_arrow_right Article , Preprint 2017 FrancePublisher:EDP Sciences Funded by:NSERC, FWF | Tracing the early lives o...NSERC ,FWF| Tracing the early lives of starsAdam Popowicz; Andrzej Pigulski; Krzysztof Bernacki; Rainer Kuschnig; Herbert Pablo; Tahina Ramiaramanantsoa; E. Zocłońska; Dietrich Baade; Gerald Handler; Anthony F. J. Moffat; Gregg A. Wade; C. Neiner; Slavek M. Rucinski; Werner W. Weiss; Otto Koudelka; Piotr Orleanski; A. Schwarzenberg-Czerny; Konstanze Zwintz;International audience; Context. The BRIght Target Explorer (BRITE) mission is a pioneering space project aimed at the long-term photometric monitoring of the brightest stars in the sky by means of a constellation of nanosatellites. Its main advantage is high photometric accuracy and time coverage which are inaccessible from the ground. Its main drawback is the lack of cooling of the CCD detectors and the absence of good shielding that would protect them from energetic particles. <BR /> Aims: The main aim of this paper is the presentation of procedures used to obtain high-precision photometry from a series of images acquired by the BRITE satellites in two modes of observing, stare and chopping. The other aim is a comparison of the photometry obtained with two different pipelines and a comparison of the real scatter with expectations. <BR /> Methods: We developed two pipelines corresponding to the two modes of observing. They are based on aperture photometry with a constant aperture, circular for stare mode of observing and thresholded for chopping mode. Impulsive noise is a serious problem for observations made in the stare mode of observing and therefore in the pipeline developed for observations made in this mode, hot pixels are replaced using the information from shifted images in a series obtained during a single orbit of a satellite. In the other pipeline, the hot pixel replacement is not required because the photometry is made in difference images. <BR /> Results: The assessment of the performance of both pipelines is presented. It is based on two comparisons, which use data from six runs of the UniBRITE satellite: (I) comparison of photometry obtained by both pipelines on the same data, which were partly affected by charge transfer inefficiency (CTI), (II) comparison of real scatter with theoretical expectations. It is shown that for CTI-affected observations, the chopping pipeline provides much better photometry than the other pipeline. For other observations, the results are comparable only for data obtained shortly after switching to chopping mode. Starting from about 2.5 years in orbit, the chopping mode of observing provides significantly better photometry for UniBRITE data than the stare mode. <BR /> Conclusions: This paper shows that high-precision space photometry with low-cost nanosatellites is achievable. The proposed methods, used to obtain photometry from images affected by high impulsive noise, can be applied to data from other space missions or even to data acquired from ground-based observations.
Astronomy and Astrop... arrow_drop_down https://doi.org/10.48550/arxiv...Article . 2017License: arXiv Non-Exclusive DistributionData sources: Dataciteadd 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 38 citations 38 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Astronomy and Astrop... arrow_drop_down https://doi.org/10.48550/arxiv...Article . 2017License: arXiv Non-Exclusive DistributionData sources: Dataciteadd 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.eudescription Publicationkeyboard_double_arrow_right Preprint , Article , Other literature type 2011 FrancePublisher:Elsevier BV Funded by:FWF | Computational mean-field ...FWF| Computational mean-field games and applicationAuthors: Lachapelle, Aimé; Wolfram, Marie-Thérèse;Lachapelle, Aimé; Wolfram, Marie-Thérèse;In this paper we present a new class of pedestrian crowd models based on the mean field games theory introduced by Lasry and Lions in 2006. This macroscopic approach is based on a microscopic model, that considers smart pedestrians who rationally interact and anticipate the future. This leads to a forward-backward structure in time. We focus on two-population interactions and validate the modeling with simple examples such as self-organization behavior as for instance lane formation. Two complementary classes of problems are addressed, namely the case of crowd aversion and the one of congestion. In both cases we describe the model, build a numerical solver (respectively based on optimization formulation and partial differential equations), and finally provide some numerical tests involving complex group behaviors such as symmetry breaking and lane formation.
Hyper Article en Lig... arrow_drop_down Transportation Research Part B MethodologicalArticle . 2011 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationPreprint . 2011Full-Text: https://hal.science/hal-00554898/documentadd 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 Routeshybrid 174 citations 174 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!more_vert Hyper Article en Lig... arrow_drop_down Transportation Research Part B MethodologicalArticle . 2011 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationPreprint . 2011Full-Text: https://hal.science/hal-00554898/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 , Other literature type 2019 Germany, FrancePublisher:Oxford University Press (OUP) Funded by:FWF | AlpArray Austria 2, FWF | AlpArray AustriaFWF| AlpArray Austria 2 ,FWF| AlpArray AustriaKolinsky, Petr; Bokelmann, Goetz; Hetenyi, Gyorgy; Abreu, Rafael; Allegretti, Ivo; Apoloner, Maria-theresia; Aubert, Coralie; Besancon, Simon; Bes De Berc, Maxime; Bokel-mann, Gotz; Brunel, Didier; Capello, Marco; Carman, Martina; Cavaliere, Adriano; Cheze, Jerome; Chiarabba, Claudio; Clinton, John; Cougoulat, Glenn; Crawford, Wayne C.; Cristiano, Luigia; Czifra, Tibor; D'Alema, Ezio; Danesi, Stefania; Daniel, Romuald; Dannowski, Anke; Dasovic, Iva; Deschamps, Anne; Dessa, Jean-xavier; Doubre, Cecile; Egdorf, Sven; Fiket, Tomislav; Fischer, Kasper; Friederich, Wolfgang; Fuchs, Florian; Funke, Sigward; Giardini, Domenico; Govoni, Aladino; Graczer, Zoltan; Groschl, Gidera; Heimers, Stefan; Heit, Ben; Herak, Davorka; Herak, Marijan; Huber, Johann; Jaric, Dejan; Jedlicka, Petr; Jia, Yan; Jund, Helene; Kissling, Edi; Klingen, Stefan; Klotz, Bernhard; Kolinsky, Petr; Kopp, Heidrun; Korn, Michael; Kotek, Josef; Kuhne, Lothar; Kuk, Kreso; Lange, Dietrich; Loos, Jurgen; Lovati, Sara; Malengros, Deny; Margheriti, Lucia; Maron, Christophe; Martin, Xavier; Massa, Marco; Mazzarini, Francesco; Meier, Thomas; Metral, Laurent; Molinari, Irene; Moretti, Milena; Nardi, Anna; Pahor, Jurij; Paul, Anne; Pequegnat, Catherine; Petersen, Daniel; Pesaresi, Damiano; Piccinini, Davide; Piromallo, Claudia; Plenefisch, Thomas; Plomerova, Jaroslava; Pondrelli, Silvia; Prevolnik, Snjezan; Racine, Roman; Regnier, Marc; Reiss, Miriam; Ritter, Joachim; Rumpker, Georg; Salimbeni, Simone; Santulin, Marco; Scherer, Werner; Schippkus, Sven; Schulte-kortnack, Detlef; Sipka, Vesna; Solarino, Stefano; Spallarossa, Daniele; Spieker, Kathrin; Stipcevic, Josip; Strollo, Angelo; Sule, Balint; Szanyi, Gyongyver; Szucs, Eszter; Thomas, Christine; Thorwart, Martin; Tilmann, Frederik; Ueding, Stefan; Vallocchia, Massimiliano; Vecsey, Ludek; Voigt, Rene; Wassermann, Joachim; Weber, Zoltan; Weidle, Christian; Wesztergom, Viktor; Weyland, Gauthier; Wiemer, Stefan; Wolf, Felix; Wolyniec, David; Zieke, Thomas; Zivcic, Mladen; Zlebcikova, Helena;doi: 10.1093/gji/ggz081
International audience; The dense AlpArray network allows studying seismic wave propagation with high spatial resolution. Here we introduce an array approach to measure arrival angles of teleseismic Rayleigh waves. The approach combines the advantages of phase correlation as in the two-station method with array beamforming to obtain the phase-velocity vector. 20 earthquakes from the first two years of the AlpArray project are selected, and spatial patterns of arrival-angle deviations across the AlpArray are shown in maps, depending on period and earthquake location. The cause of these intriguing spatial patterns is discussed. A simple wave-propagation modelling example using an isolated anomaly and a Gaussian beam solution suggests that much of the complexity can be explained as a result of wave interference after passing a structural anomaly along the wave paths. This indicates that arrival-angle information constitutes useful additional information on the Earth structure, beyond what is currently used in inversions.
OceanRep arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2019Data sources: ArchiMer - Institutional Archive of IfremerGeophysical Journal InternationalArticle . 2019 . Peer-reviewedLicense: CC BYData 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 Routeshybrid 12 citations 12 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert OceanRep arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2019Data sources: ArchiMer - Institutional Archive of IfremerGeophysical Journal InternationalArticle . 2019 . Peer-reviewedLicense: CC BYData 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.eudescription Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type , Review 2017 Netherlands, United States, Netherlands, Finland, Germany, Denmark, FrancePublisher:Copernicus GmbH Funded by:FWF | Carbonyl sulfide exchange..., AKA | Carbon Balance under Chan..., AKA | Biosphere-Atmosphere Feed... +7 projectsFWF| Carbonyl sulfide exchange between terrestrial ecosystems and the atmosphere ,AKA| Carbon Balance under Changing Processes of Arctic and Subarctic Cryosphere (CARB-ARC) / Consortium: CARB-ARC ,AKA| Biosphere-Atmosphere Feedbacks and Carbon-Water Cycles ,AKA| Biosphere-Atmosphere Feedbacks and Carbon-Water Cycles ,NSF| Collaborative Research: A 1500m Ice Core from South Pole ,NSF| CAREER: Disentangling CO2 Fluxes in a Tropical Rainforest Using Carbonyl Sulfide ,NSF| AGS-PRF: Soil Exchange of Carbonyl Sulfide (COS): Towards an Independent Proxy for Terrestrial Gross Primary Production (GPP) ,EC| SOLCA ,EC| USIFlux ,AKA| Centre of Excellence in Atmospheric Science From Molecular and Biolocigal processes to The Global ClimateM. E. Whelan; M. E. Whelan; S. T. Lennartz; T. E. Gimeno; R. Wehr; G. Wohlfahrt; Y. Wang; L. M. J. Kooijmans; T. W. Hilton; S. Belviso; P. Peylin; R. Commane; W. Sun; H. Chen; L. Kuai; I. Mammarella; K. Maseyk; M. Berkelhammer; K.-F. Li; D. Yakir; A. Zumkehr; Y. Katayama; J. Ogée; F. M. Spielmann; F. Kitz; B. Rastogi; J. Kesselmeier; J. Marshall; K.-M. Erkkilä; L. Wingate; L. K. Meredith; W. He; R. Bunk; T. Launois; T. Vesala; T. Vesala; T. Vesala; J. A. Schmidt; C. G. Fichot; U. Seibt; S. Saleska; E. S. Saltzman; S. A. Montzka; J. A. Berry; J. E. Campbell;For the past decade, observations of carbonyl sulfide (OCS or COS) have been investigated as a proxy for carbon uptake by plants. OCS is destroyed by enzymes that interact with CO2 during photosynthesis, namely carbonic anhydrase (CA) and RuBisCO, where CA is the more important one. The majority of sources of OCS to the atmosphere are geographically separated from this large plant sink, whereas the sources and sinks of CO2 are co-located in ecosystems. The drawdown of OCS can therefore be related to the uptake of CO2 without the added complication of co-located emissions comparable in magnitude. Here we review the state of our understanding of the global OCS cycle and its applications to ecosystem carbon cycle science. OCS uptake is correlated well to plant carbon uptake, especially at the regional scale. OCS can be used in conjunction with other independent measures of ecosystem function, like solar-induced fluorescence and carbon and water isotope studies. More work needs to be done to generate global coverage for OCS observations and to link this powerful atmospheric tracer to systems where fundamental questions concerning the carbon and water cycle remain.
OceanRep arrow_drop_down eScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaCopenhagen University Research Information SystemArticle . 2018Data sources: Copenhagen University Research Information SystemeScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaeScholarship - University of CaliforniaArticle . 2017Data sources: eScholarship - University of CaliforniaHELDA - Digital Repository of the University of HelsinkiReview . 2018 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiMémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2018License: CC BYFull-Text: https://hal.science/hal-02104411/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 RoutesGreen gold 94 citations 94 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!download 91download downloads 91 Powered bymore_vert OceanRep arrow_drop_down eScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaCopenhagen University Research Information SystemArticle . 2018Data sources: Copenhagen University Research Information SystemeScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaeScholarship - University of CaliforniaArticle . 2017Data sources: eScholarship - University of CaliforniaHELDA - Digital Repository of the University of HelsinkiReview . 2018 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiMémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2018License: CC BYFull-Text: https://hal.science/hal-02104411/documentadd 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 , Preprint 2017 FrancePublisher:EDP Sciences Funded by:NSERC, FWF | Tracing the early lives o...NSERC ,FWF| Tracing the early lives of starsAdam Popowicz; Andrzej Pigulski; Krzysztof Bernacki; Rainer Kuschnig; Herbert Pablo; Tahina Ramiaramanantsoa; E. Zocłońska; Dietrich Baade; Gerald Handler; Anthony F. J. Moffat; Gregg A. Wade; C. Neiner; Slavek M. Rucinski; Werner W. Weiss; Otto Koudelka; Piotr Orleanski; A. Schwarzenberg-Czerny; Konstanze Zwintz;International audience; Context. The BRIght Target Explorer (BRITE) mission is a pioneering space project aimed at the long-term photometric monitoring of the brightest stars in the sky by means of a constellation of nanosatellites. Its main advantage is high photometric accuracy and time coverage which are inaccessible from the ground. Its main drawback is the lack of cooling of the CCD detectors and the absence of good shielding that would protect them from energetic particles. <BR /> Aims: The main aim of this paper is the presentation of procedures used to obtain high-precision photometry from a series of images acquired by the BRITE satellites in two modes of observing, stare and chopping. The other aim is a comparison of the photometry obtained with two different pipelines and a comparison of the real scatter with expectations. <BR /> Methods: We developed two pipelines corresponding to the two modes of observing. They are based on aperture photometry with a constant aperture, circular for stare mode of observing and thresholded for chopping mode. Impulsive noise is a serious problem for observations made in the stare mode of observing and therefore in the pipeline developed for observations made in this mode, hot pixels are replaced using the information from shifted images in a series obtained during a single orbit of a satellite. In the other pipeline, the hot pixel replacement is not required because the photometry is made in difference images. <BR /> Results: The assessment of the performance of both pipelines is presented. It is based on two comparisons, which use data from six runs of the UniBRITE satellite: (I) comparison of photometry obtained by both pipelines on the same data, which were partly affected by charge transfer inefficiency (CTI), (II) comparison of real scatter with theoretical expectations. It is shown that for CTI-affected observations, the chopping pipeline provides much better photometry than the other pipeline. For other observations, the results are comparable only for data obtained shortly after switching to chopping mode. Starting from about 2.5 years in orbit, the chopping mode of observing provides significantly better photometry for UniBRITE data than the stare mode. <BR /> Conclusions: This paper shows that high-precision space photometry with low-cost nanosatellites is achievable. The proposed methods, used to obtain photometry from images affected by high impulsive noise, can be applied to data from other space missions or even to data acquired from ground-based observations.
Astronomy and Astrop... arrow_drop_down https://doi.org/10.48550/arxiv...Article . 2017License: arXiv Non-Exclusive DistributionData sources: Dataciteadd 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 bronze 38 citations 38 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Astronomy and Astrop... arrow_drop_down https://doi.org/10.48550/arxiv...Article . 2017License: arXiv Non-Exclusive DistributionData sources: Dataciteadd 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=10.1051/0004-6361/201730806&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Preprint , Article , Other literature type 2011 FrancePublisher:Elsevier BV Funded by:FWF | Computational mean-field ...FWF| Computational mean-field games and applicationAuthors: Lachapelle, Aimé; Wolfram, Marie-Thérèse;Lachapelle, Aimé; Wolfram, Marie-Thérèse;In this paper we present a new class of pedestrian crowd models based on the mean field games theory introduced by Lasry and Lions in 2006. This macroscopic approach is based on a microscopic model, that considers smart pedestrians who rationally interact and anticipate the future. This leads to a forward-backward structure in time. We focus on two-population interactions and validate the modeling with simple examples such as self-organization behavior as for instance lane formation. Two complementary classes of problems are addressed, namely the case of crowd aversion and the one of congestion. In both cases we describe the model, build a numerical solver (respectively based on optimization formulation and partial differential equations), and finally provide some numerical tests involving complex group behaviors such as symmetry breaking and lane formation.
Hyper Article en Lig... arrow_drop_down Transportation Research Part B MethodologicalArticle . 2011 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationPreprint . 2011Full-Text: https://hal.science/hal-00554898/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 174 citations 174 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!more_vert Hyper Article en Lig... arrow_drop_down Transportation Research Part B MethodologicalArticle . 2011 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationPreprint . 2011Full-Text: https://hal.science/hal-00554898/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 , Other literature type 2019 Germany, FrancePublisher:Oxford University Press (OUP) Funded by:FWF | AlpArray Austria 2, FWF | AlpArray AustriaFWF| AlpArray Austria 2 ,FWF| AlpArray AustriaKolinsky, Petr; Bokelmann, Goetz; Hetenyi, Gyorgy; Abreu, Rafael; Allegretti, Ivo; Apoloner, Maria-theresia; Aubert, Coralie; Besancon, Simon; Bes De Berc, Maxime; Bokel-mann, Gotz; Brunel, Didier; Capello, Marco; Carman, Martina; Cavaliere, Adriano; Cheze, Jerome; Chiarabba, Claudio; Clinton, John; Cougoulat, Glenn; Crawford, Wayne C.; Cristiano, Luigia; Czifra, Tibor; D'Alema, Ezio; Danesi, Stefania; Daniel, Romuald; Dannowski, Anke; Dasovic, Iva; Deschamps, Anne; Dessa, Jean-xavier; Doubre, Cecile; Egdorf, Sven; Fiket, Tomislav; Fischer, Kasper; Friederich, Wolfgang; Fuchs, Florian; Funke, Sigward; Giardini, Domenico; Govoni, Aladino; Graczer, Zoltan; Groschl, Gidera; Heimers, Stefan; Heit, Ben; Herak, Davorka; Herak, Marijan; Huber, Johann; Jaric, Dejan; Jedlicka, Petr; Jia, Yan; Jund, Helene; Kissling, Edi; Klingen, Stefan; Klotz, Bernhard; Kolinsky, Petr; Kopp, Heidrun; Korn, Michael; Kotek, Josef; Kuhne, Lothar; Kuk, Kreso; Lange, Dietrich; Loos, Jurgen; Lovati, Sara; Malengros, Deny; Margheriti, Lucia; Maron, Christophe; Martin, Xavier; Massa, Marco; Mazzarini, Francesco; Meier, Thomas; Metral, Laurent; Molinari, Irene; Moretti, Milena; Nardi, Anna; Pahor, Jurij; Paul, Anne; Pequegnat, Catherine; Petersen, Daniel; Pesaresi, Damiano; Piccinini, Davide; Piromallo, Claudia; Plenefisch, Thomas; Plomerova, Jaroslava; Pondrelli, Silvia; Prevolnik, Snjezan; Racine, Roman; Regnier, Marc; Reiss, Miriam; Ritter, Joachim; Rumpker, Georg; Salimbeni, Simone; Santulin, Marco; Scherer, Werner; Schippkus, Sven; Schulte-kortnack, Detlef; Sipka, Vesna; Solarino, Stefano; Spallarossa, Daniele; Spieker, Kathrin; Stipcevic, Josip; Strollo, Angelo; Sule, Balint; Szanyi, Gyongyver; Szucs, Eszter; Thomas, Christine; Thorwart, Martin; Tilmann, Frederik; Ueding, Stefan; Vallocchia, Massimiliano; Vecsey, Ludek; Voigt, Rene; Wassermann, Joachim; Weber, Zoltan; Weidle, Christian; Wesztergom, Viktor; Weyland, Gauthier; Wiemer, Stefan; Wolf, Felix; Wolyniec, David; Zieke, Thomas; Zivcic, Mladen; Zlebcikova, Helena;doi: 10.1093/gji/ggz081
International audience; The dense AlpArray network allows studying seismic wave propagation with high spatial resolution. Here we introduce an array approach to measure arrival angles of teleseismic Rayleigh waves. The approach combines the advantages of phase correlation as in the two-station method with array beamforming to obtain the phase-velocity vector. 20 earthquakes from the first two years of the AlpArray project are selected, and spatial patterns of arrival-angle deviations across the AlpArray are shown in maps, depending on period and earthquake location. The cause of these intriguing spatial patterns is discussed. A simple wave-propagation modelling example using an isolated anomaly and a Gaussian beam solution suggests that much of the complexity can be explained as a result of wave interference after passing a structural anomaly along the wave paths. This indicates that arrival-angle information constitutes useful additional information on the Earth structure, beyond what is currently used in inversions.
OceanRep arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2019Data sources: ArchiMer - Institutional Archive of IfremerGeophysical Journal InternationalArticle . 2019 . Peer-reviewedLicense: CC BYData 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.euAccess Routeshybrid 12 citations 12 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert OceanRep arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2019Data sources: ArchiMer - Institutional Archive of IfremerGeophysical Journal InternationalArticle . 2019 . Peer-reviewedLicense: CC BYData 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 , Preprint , Other literature type , Review 2017 Netherlands, United States, Netherlands, Finland, Germany, Denmark, FrancePublisher:Copernicus GmbH Funded by:FWF | Carbonyl sulfide exchange..., AKA | Carbon Balance under Chan..., AKA | Biosphere-Atmosphere Feed... +7 projectsFWF| Carbonyl sulfide exchange between terrestrial ecosystems and the atmosphere ,AKA| Carbon Balance under Changing Processes of Arctic and Subarctic Cryosphere (CARB-ARC) / Consortium: CARB-ARC ,AKA| Biosphere-Atmosphere Feedbacks and Carbon-Water Cycles ,AKA| Biosphere-Atmosphere Feedbacks and Carbon-Water Cycles ,NSF| Collaborative Research: A 1500m Ice Core from South Pole ,NSF| CAREER: Disentangling CO2 Fluxes in a Tropical Rainforest Using Carbonyl Sulfide ,NSF| AGS-PRF: Soil Exchange of Carbonyl Sulfide (COS): Towards an Independent Proxy for Terrestrial Gross Primary Production (GPP) ,EC| SOLCA ,EC| USIFlux ,AKA| Centre of Excellence in Atmospheric Science From Molecular and Biolocigal processes to The Global ClimateM. E. Whelan; M. E. Whelan; S. T. Lennartz; T. E. Gimeno; R. Wehr; G. Wohlfahrt; Y. Wang; L. M. J. Kooijmans; T. W. Hilton; S. Belviso; P. Peylin; R. Commane; W. Sun; H. Chen; L. Kuai; I. Mammarella; K. Maseyk; M. Berkelhammer; K.-F. Li; D. Yakir; A. Zumkehr; Y. Katayama; J. Ogée; F. M. Spielmann; F. Kitz; B. Rastogi; J. Kesselmeier; J. Marshall; K.-M. Erkkilä; L. Wingate; L. K. Meredith; W. He; R. Bunk; T. Launois; T. Vesala; T. Vesala; T. Vesala; J. A. Schmidt; C. G. Fichot; U. Seibt; S. Saleska; E. S. Saltzman; S. A. Montzka; J. A. Berry; J. E. Campbell;For the past decade, observations of carbonyl sulfide (OCS or COS) have been investigated as a proxy for carbon uptake by plants. OCS is destroyed by enzymes that interact with CO2 during photosynthesis, namely carbonic anhydrase (CA) and RuBisCO, where CA is the more important one. The majority of sources of OCS to the atmosphere are geographically separated from this large plant sink, whereas the sources and sinks of CO2 are co-located in ecosystems. The drawdown of OCS can therefore be related to the uptake of CO2 without the added complication of co-located emissions comparable in magnitude. Here we review the state of our understanding of the global OCS cycle and its applications to ecosystem carbon cycle science. OCS uptake is correlated well to plant carbon uptake, especially at the regional scale. OCS can be used in conjunction with other independent measures of ecosystem function, like solar-induced fluorescence and carbon and water isotope studies. More work needs to be done to generate global coverage for OCS observations and to link this powerful atmospheric tracer to systems where fundamental questions concerning the carbon and water cycle remain.
OceanRep arrow_drop_down eScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaCopenhagen University Research Information SystemArticle . 2018Data sources: Copenhagen University Research Information SystemeScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaeScholarship - University of CaliforniaArticle . 2017Data sources: eScholarship - University of CaliforniaHELDA - Digital Repository of the University of HelsinkiReview . 2018 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiMémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2018License: CC BYFull-Text: https://hal.science/hal-02104411/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 RoutesGreen gold 94 citations 94 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!download 91download downloads 91 Powered bymore_vert OceanRep arrow_drop_down eScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaCopenhagen University Research Information SystemArticle . 2018Data sources: Copenhagen University Research Information SystemeScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaeScholarship - University of CaliforniaArticle . 2017Data sources: eScholarship - University of CaliforniaHELDA - Digital Repository of the University of HelsinkiReview . 2018 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiMémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2018License: CC BYFull-Text: https://hal.science/hal-02104411/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/bg-2017-427&type=result"></script>'); --> </script>
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