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Compared performances of microwave passive soil moisture retrievals (SMOS) and active soil moisture retrievals (ASCAT) using land surface model estimates (MERRA-LAND)

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorAL YAARI, Amen
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWIGNERON, Jean-Pierre
hal.structure.identifierMilieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols [METIS]
dc.contributor.authorDUCHARNE, Agnès
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorKERR, Yann H.
hal.structure.identifierVienna University of Technology
dc.contributor.authorWAGNER, Wolfgang
hal.structure.identifierAtmospheric and Environmental Research, Inc. [AER]
dc.contributor.authorREICHLE, Rolf
hal.structure.identifierAtmospheric and Environmental Research, Inc. [AER]
dc.contributor.authorDE LANNOY, Gabrielle
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorAHMAD, Al Bitar
hal.structure.identifierVienna University of Technology
dc.contributor.authorDORIGO, Wouter
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorPARRENS, Marie
hal.structure.identifierUniversitat de València = University of Valencia [UV]
dc.contributor.authorFERNÁNDEZ MORAN, Roberto
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorRICHAUME, Philippe
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorMIALON, Arnaud
dc.date.accessioned2024-04-08T11:59:26Z
dc.date.available2024-04-08T11:59:26Z
dc.date.issued2014
dc.date.conference2014-07-13
dc.identifier.isbn978-1-4799-5775-0
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195992
dc.description.abstractEnPerformances of two global satellite-based surface soil moisture (SSM) retrievals with respect to model-based SSM derived from the MERRA (Modern-Era Retrospective analysis for Research and Applications) rea-nalysis were explored in this paper: (i) Soil Moisture and Ocean Salinity (SMOS; passive) Level-3 SSM (SMOSL3) and (ii) the Advanced Scatterometer (ASCAT; active) SSM. Temporal correlation was used to investigate the performance of SMOSL3 and ASCAT SSM products during the period 05/2010–2012 on a global basis. Both SMOSL3 and ASCAT (slightly better) captured well (R>0.70) the long-term variability of the modelled SSM, particularly, over the Indian subcontinent, the Great Plains of North America, and the Sahel. However, ASCAT had negative correlations in arid regions, in particular across the Sahara and the Arabian Peninsula. This may be due to complex scattering mechanisms over very dry surfaces. To explore the land cover dependence of the analyzed statistical indicators, the global correlation results were averaged per biome extracted from a global map of biomes. In general, SMOSL3 and ASCAT performances behaved differently from one biome to another. For SMOSL3, the highest average correlation was observed over “tropical semi-arid” (R = ∼ 0.5) and “temperate semi-arid” biomes, whereas for ASCAT, the highest correlations were observed over “tropical semi-arid” (R = ∼ 0.7) and “tropical humid” biomes. The poorest agreement for both SMOSL3 and ASCAT was generally found over “tundra” and “desert temperate” biomes, particularly for ASCAT. This study showed that the performance of both SMOSL3 and ASCAT is highly dependent on vegetation. We also showed that both of them provide complementary information on SSM, which implies a potential for data fusion which would be pertinent for the ESA climate change initiative (CCI).
dc.language.isoen
dc.publisherIEEE
dc.publisher.location(united states)
dc.source.titleIEEE International Geoscience and Remote Sensing Symposium Proceedings
dc.subjectSMOS
dc.subjectsoil moisture
dc.subjectbiomes
dc.subject.enASCAT
dc.title.enCompared performances of microwave passive soil moisture retrievals (SMOS) and active soil moisture retrievals (ASCAT) using land surface model estimates (MERRA-LAND)
dc.typeCommunication dans un congrès
dc.identifier.doi10.1109/IGARSS.2014.6946971
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
dc.subject.halSciences de l'ingénieur [physics]/Traitement du signal et de l'image
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.titleIGARSS 2014, International Geoscience and Remote Sensing Symposium
bordeaux.countryCA
bordeaux.title.proceedingIEEE International Geoscience and Remote Sensing Symposium Proceedings
bordeaux.conference.cityQuébec
bordeaux.peerReviewedoui
hal.identifierhal-02740508
hal.version1
hal.invitednon
hal.conference.organizerIEEE Geoscience and Remote Sensing Society (GRSS). USA.
hal.conference.end2014-07-18
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02740508v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=IEEE%20International%20Geoscience%20and%20Remote%20Sensing%20Symposium%20Proceedings&rft.date=2014&rft.au=AL%20YAARI,%20Amen&WIGNERON,%20Jean-Pierre&DUCHARNE,%20Agn%C3%A8s&KERR,%20Yann%20H.&WAGNER,%20Wolfgang&rft.isbn=978-1-4799-5775-0&rft.genre=unknown


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