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“Tau-Omega”- and two-stream emission models applied to close-range and SMOS measurements

hal.structure.identifierSwiss Federal Institute for Forest, Snow and Landscape Research WSL
dc.contributor.authorSCHWANK, M.
hal.structure.identifierUniversity of British Columbia [UBC]
dc.contributor.authorXIAOJUN, Li
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorKERR, Yann H.
hal.structure.identifierSwiss Federal Institute for Forest, Snow and Landscape Research WSL
dc.contributor.authorNADERPOUR, Reza
hal.structure.identifierUniversität Bern = University of Bern = Université de Berne [UNIBE]
dc.contributor.authorMATZLER, Christian
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWIGNERON, Jean-Pierre
dc.date.accessioned2024-04-08T11:56:23Z
dc.date.available2024-04-08T11:56:23Z
dc.date.issued2019
dc.date.conference2019-07-28
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195753
dc.description.abstractEnAn Emission Models (EM) adequate for a retrieval algorithm requires being simple while still capturing the responses of brightness temperatures T B p,θ to the retrieval parameters. The objective of this study is to explore the benefits of the multiple-scattering Two-Stream (2S) EM over the "Tau-Omega" (TO) EM to retrieve soil Water Content WC and vegetation optical depth τ from L-band T B p,θ . For sparse and low-scattering vegetation T B,EM p,θ simulated with EM = TO and EM = 2S converge, which is not the case for dense and strongly scattering vegetation. WC RC and τ RC are retrieved with Retrieval Configurations RC = {TO, 2S} from T B p,θ : i) from a tower within a deciduous forest, and ii) by the "Soil Moisture and Ocean Salinity" (SMOS) mission. Using 2S EM instead of TO EM resulted in marginally lower WC RC retrievals while τ RC retrievals are reduced more considerably. With respect to in-situ WC in-situ , retrievals WC 2S derived from tower-based T B p,θ performed better than forest soil water-content WC TO retrieved via the inversion of the "reference" TO EM. Likewise, SMOS based WC 2S retrievals revealed better agreement with ECMWF WC simulations than WC TO achieved with the "reference" RC = TO. In short, our study provides clear evidence that it is meaningful to replace TO EM used for current SMOS and SMAP land retrieval with 2S EM.Further advantages of the 2S EM over the TO EM are outlined in this study.
dc.language.isoen
dc.source.titleIEEE International Symposium on Geoscience and Remote Sensing IGARSS
dc.title.en“Tau-Omega”- and two-stream emission models applied to close-range and SMOS measurements
dc.typeCommunication dans un congrès
dc.identifier.doi10.1109/IGARSS.2019.8898225
dc.subject.halSciences du Vivant [q-bio]
bordeaux.page6158-6161
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.title2019 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2019)
bordeaux.countryJP
bordeaux.title.proceedingIEEE International Symposium on Geoscience and Remote Sensing IGARSS
bordeaux.conference.cityYokohama
bordeaux.peerReviewedoui
hal.identifierhal-02789906
hal.version1
hal.invitednon
hal.proceedingsnon
hal.conference.end2019-08-02
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02789906v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=IEEE%20International%20Symposium%20on%20Geoscience%20and%20Remote%20Sensing%20IGARSS&rft.date=2019&rft.spage=6158-6161&rft.epage=6158-6161&rft.au=SCHWANK,%20M.&XIAOJUN,%20Li&KERR,%20Yann%20H.&NADERPOUR,%20Reza&MATZLER,%20Christian&rft.genre=unknown


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