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Global-scale evaluation of roughness effects on C-Band AMSR-E observations

hal.structure.identifierBeijing Normal University [BNU]
dc.contributor.authorWANG, Shu
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWIGNERON, Jean-Pierre
hal.structure.identifierBeijing Normal University [BNU]
dc.contributor.authorJIANG, Ling-Mei
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorPARRENS, Marie
hal.structure.identifierBeijing Normal University [BNU]
dc.contributor.authorYU, Xiao-Yong
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorAL-YAARI, Amen
hal.structure.identifierBeijing Normal University [BNU]
dc.contributor.authorYE, Qin-Yu
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierUniversitat de València [UV]
dc.contributor.authorFERNÁNDEZ-MORÁN, Roberto
hal.structure.identifierInstitute of Remote Sensing and Digital Earth
dc.contributor.authorJI, Wei
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorKERR, Yann H.
dc.date.accessioned2024-04-08T12:03:12Z
dc.date.available2024-04-08T12:03:12Z
dc.date.issued2015
dc.identifier.issn2072-4292
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196252
dc.description.abstractEnQuantifying roughness effects on ground surface emissivity is an important step in obtaining high-quality soil moisture products from large-scale passive microwave sensors. In this study, we used a semi-empirical method to evaluate roughness effects (parameterized here by the parameter) on a global scale from AMSR-E (Advanced Microwave Scanning Radiometer for EOS) observations. AMSR-E brightness temperatures at 6.9 GHz obtained from January 2009 to September 2011, together with estimations of soil moisture from the SMOS (Soil Moisture and Ocean Salinity) L3 products and of soil temperature from ECMWF’s (European Centre for Medium-range Weather Forecasting) were used as inputs in a retrieval process. In the first step, we retrieved a parameter (referred to as the parameter) accounting for the combined effects of roughness and vegetation. Then, global MODIS NDVI data were used to decouple the effects of vegetation from those of surface roughness. Finally, global maps of the Hr parameters were produced and discussed. Initial results showed that some spatial patterns in the values could be associated with the main vegetation types (higher values of were retrieved generally in forested regions, intermediate values were obtained over crops and grasslands, and lower values were obtained over shrubs and desert) and topography. For instance, over the USA, lower values of were retrieved in relatively flat regions while relatively higher values were retrieved in hilly regions.
dc.language.isoen
dc.publisherMDPI
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subjectsoil moisture
dc.subject.ensoil surface roughness
dc.subject.enAMSR-E
dc.title.enGlobal-scale evaluation of roughness effects on C-Band AMSR-E observations
dc.typeArticle de revue
dc.identifier.doi10.3390/rs70505734
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre
dc.subject.halSciences de l'ingénieur [physics]/Electromagnétisme
dc.subject.halSciences de l'ingénieur [physics]/Traitement du signal et de l'image
bordeaux.journalRemote Sensing
bordeaux.page5734-5757
bordeaux.volume7
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue5
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02631606
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02631606v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Remote%20Sensing&rft.date=2015&rft.volume=7&rft.issue=5&rft.spage=5734-5757&rft.epage=5734-5757&rft.eissn=2072-4292&rft.issn=2072-4292&rft.au=WANG,%20Shu&WIGNERON,%20Jean-Pierre&JIANG,%20Ling-Mei&PARRENS,%20Marie&YU,%20Xiao-Yong&rft.genre=article


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