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A new calibration of the effective scattering albedo and soil roughness parameters in the SMOS SM retrieval algorithm

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierDepartment of Earth Physics and Thermodynamics [Valencia]
dc.contributor.authorFERNANDEZ MORAN, Roberto
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWIGNERON, Jean-Pierre
hal.structure.identifierNASA Goddard Space Flight Center [GSFC]
hal.structure.identifierDepartment of Earth and Environmental Sciences [Leuven] [EES]
dc.contributor.authorDE LANNOY, G.
hal.structure.identifierDepartment of Earth Physics and Thermodynamics [Valencia]
dc.contributor.authorLOPEZ-BAEZA, E.
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
hal.structure.identifierUniversité de Toulouse [UT]
hal.structure.identifierCentre National d'Études Spatiales [Toulouse] [CNES]
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
hal.structure.identifierInstitut de Recherche pour le Développement [IRD [France-Ouest]]
dc.contributor.authorPARRENS, Marie
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
hal.structure.identifierUniversité de Toulouse [UT]
hal.structure.identifierCentre National d'Études Spatiales [Toulouse] [CNES]
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
hal.structure.identifierInstitut de Recherche pour le Développement [IRD [France-Ouest]]
dc.contributor.authorMIALON, Arnaud
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
hal.structure.identifierUniversité de Toulouse [UT]
hal.structure.identifierCentre National d'Études Spatiales [Toulouse] [CNES]
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
hal.structure.identifierInstitut de Recherche pour le Développement [IRD [France-Ouest]]
dc.contributor.authorMAHMOODI, Ali
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorAL YAARI, Amen
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
hal.structure.identifierUniversité de Toulouse [UT]
hal.structure.identifierCentre National d'Études Spatiales [Toulouse] [CNES]
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
hal.structure.identifierInstitut de Recherche pour le Développement [IRD [France-Ouest]]
dc.contributor.authorBIRCHER, Simone
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
hal.structure.identifierUniversité de Toulouse [UT]
hal.structure.identifierCentre National d'Études Spatiales [Toulouse] [CNES]
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
hal.structure.identifierInstitut de Recherche pour le Développement [IRD [France-Ouest]]
dc.contributor.authorAHMAD, Al Bitar
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
hal.structure.identifierUniversité de Toulouse [UT]
hal.structure.identifierCentre National d'Études Spatiales [Toulouse] [CNES]
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
hal.structure.identifierInstitut de Recherche pour le Développement [IRD [France-Ouest]]
dc.contributor.authorRICHAUME, Philippe
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
hal.structure.identifierUniversité de Toulouse [UT]
hal.structure.identifierCentre National d'Études Spatiales [Toulouse] [CNES]
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
hal.structure.identifierInstitut de Recherche pour le Développement [IRD [France-Ouest]]
dc.contributor.authorKERR, Yann H.
dc.date.accessioned2024-04-08T12:09:51Z
dc.date.available2024-04-08T12:09:51Z
dc.date.issued2017
dc.identifier.issn1569-8432
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196594
dc.description.abstractEnThis study focuses on the calibration of the effective vegetation scattering albedo (ω) and surface soil roughness parameters (HR, and NRp, p = H,V) in the Soil Moisture (SM) retrieval from L-band passive microwave observations using the L-band Microwave Emission of the Biosphere (L-MEB) model. In the current Soil Moisture and Ocean Salinity (SMOS) Level 2 (L2), v620, and Level 3 (L3), v300, SM retrieval algorithms, low vegetated areas are parameterized by ω = 0 and HR = 0.1, whereas values of ω = 0.06 − 0.08 and HR = 0.3 are used for forests. Several parameterizations of the vegetation and soil roughness parameters (ω, HR and NRp, p = H,V) were tested in this study, treating SMOS SM retrievals as homogeneous over each pixel instead of retrieving SM over a representative fraction of the pixel, as implemented in the operational SMOS L2 and L3 algorithms. Globally-constant values of ω = 0.10, HR = 0.4 and NRp = −1 (p = H,V) were found to yield SM retrievals that compared best with in situ SM data measured at many sites worldwide from the International Soil Moisture Network (ISMN). The calibration was repeated for collections of in situ sites classified in different land cover categories based on the International Geosphere-Biosphere Programme (IGBP) scheme. Depending on the IGBP land cover class, values of ω and HR varied, respectively, in the range 0.08–0.12 and 0.1–0.5. A validation exercise based on in situ measurements confirmed that using either a global or an IGBP-based calibration, there was an improvement in the accuracy of the SM retrievals compared to the SMOS L3 SM product considering all statistical metrics (R = 0.61, bias = −0.019 m3 m−3, ubRMSE = 0.062 m3 m−3 for the IGBP-based calibration; against R = 0.54, bias = −0.034 m3 m−3 and ubRMSE = 0.070 m3 m−3 for the SMOS L3 SM product). This result is a key step in the calibration of the roughness and vegetation parameters in the operational SMOS retrieval algorithm. The approach presented here is the core of a new forthcoming SMOS optimized SM product.
dc.language.isoen
dc.publisherElsevier
dc.rights.urihttp://creativecommons.org/licenses/by-sa/
dc.subjectalbédo
dc.subjecttélédétection microondes
dc.subjectrugosité de surface
dc.subjectrugosité du sol
dc.subjecthumidité du sol
dc.subjectsalinité des océans
dc.subjectbiosphère
dc.subject.enL-band
dc.subject.eneffective scattering albedo
dc.subject.ensoil moisture
dc.subject.ensoil roughness
dc.subject.enSMOS
dc.title.enA new calibration of the effective scattering albedo and soil roughness parameters in the SMOS SM retrieval algorithm
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jag.2017.05.013
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalInternational Journal of Applied Earth Observation and Geoinformation
bordeaux.page27-38
bordeaux.volume62
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-01604901
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01604901v1
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