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SMOSHiLat: microwave L-band emissions of organic-rich soils in the Northern cold climate zone in support of the SMOS Mission

hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorBIRCHER, Simone
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorRICHAUME, Philippe
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
dc.contributor.authorDEMONTOUX, François
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorMAHMOODI, Ali
hal.structure.identifierForschungszentrum Jülich GmbH | Centre de recherche de Jülich | Jülich Research Centre [FZJ]
dc.contributor.authorJONARD, François
hal.structure.identifierForschungszentrum Jülich GmbH | Centre de recherche de Jülich | Jülich Research Centre [FZJ]
dc.contributor.authorWEIHERMÜLLER, Lutz
hal.structure.identifierDepartment of Geosciences and Natural Resource Management [Copenhagen] [IGN]
dc.contributor.authorANDREASEN, Mie
hal.structure.identifierFinnish Meteorological Institute [FMI]
dc.contributor.authorIKONEN, Jaakko
hal.structure.identifierFinnish Meteorological Institute [FMI]
dc.contributor.authorVEHVILÄINEN, Juho
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
dc.contributor.authorRAZAFINDRATSIMA, Stephen
hal.structure.identifierFinnish Meteorological Institute [FMI]
dc.contributor.authorRAUTIAINEN, Kimmo
hal.structure.identifierSwiss Federal Institute for Forest, Snow and Landscape Research WSL
dc.contributor.authorSCHWANK, Mike
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorMIALON, Arnaud
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWIGNERON, Jean-Pierre
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorKERR, Yann H.
dc.date.accessioned2024-04-08T11:58:29Z
dc.date.available2024-04-08T11:58:29Z
dc.date.issued2015
dc.date.conference2015-05-25
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195933
dc.description.abstractEnL-band microwave (1.4 GHz) brightness temperature (TB) observations of the Soil Moisture and Ocean Salinity (SMOS) satellite are used to retrieve global soil moisture data, taking advantage of the large difference between the dielectric constant of dry soil and water. The retrieval is based on the L-band Microwave Emission of the Biosphere (L-MEB) model using tuning parameters derived from study sites in dry and temperate climate zones. Thus, the aim of the SMOSHiLat project (ESA’s STSE Changing Earth Science Network) is to improve our understanding of L-band emissions and supporting SMOS data quality in more northern climate zones covered by pronounced organic surface layers. A database is created including L-band TB and dielectric constant measurements of organic-rich soils, mainly from (1) Sodankylä, Finland (Finish Meteorological Institute), and (2) Gludsted, Denmark (HOBE). Additional organic samples are available from Islay, Scotland, and the West Siberian Plain, Russia. The L-band dielectric constant measurements conducted at the IMS Laboratory (Bordeaux, France), show no distinct variability between a range of humus types encountered in the four regions. Due to the increased bound water fraction in porous organic material dielectric constants are consistently lower than measured in the underlying sandy mineral soils. Hence, one function was fitted through all organic soil moisture – dielectric constant couples, and tested in L-MEB by means of the tower-based ELBARA radiometer dataset acquired at the Research Center Jülich using Danish organic-rich soil. The derived relation proved satisfactory, and consequently, was implemented in the SMOS Soil Moisture Level 2 Prototype Processor (SML2PP). First runs were conducted over the Sodankylä test site and compared with retrieved soil moisture using the Dobson and Mironov dielectric mixing models. Results demonstrated significantly wetter retrieved soil moisture when using the organic fit function. This is in better agreement with an in situ surface soil moisture network average from measurements specifically calibrated for organic material and representative for prevailing land cover and soil types. Further test runs over other sites are planned in the near future. In this presentation, the SMOSHiLat project will be presented with special focus on the SML2PP studies.
dc.language.isoen
dc.title.enSMOSHiLat: microwave L-band emissions of organic-rich soils in the Northern cold climate zone in support of the SMOS Mission
dc.typeCommunication dans un congrès
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre
dc.subject.halSciences de l'ingénieur [physics]/Traitement du signal et de l'image
dc.subject.halSciences de l'ingénieur [physics]/Electromagnétisme
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
dc.subject.halPlanète et Univers [physics]/Interfaces continentales, environnement
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.title2. SMOS Science Conference
bordeaux.countryES
bordeaux.conference.cityMadrid
bordeaux.peerReviewednon
hal.identifierhal-02742610
hal.version1
hal.invitednon
hal.proceedingsnon
hal.conference.organizerEuropean Space Agency (ESA). INT.
hal.conference.end2015-05-29
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02742610v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2015&rft.au=BIRCHER,%20Simone&RICHAUME,%20Philippe&DEMONTOUX,%20Fran%C3%A7ois&MAHMOODI,%20Ali&JONARD,%20Fran%C3%A7ois&rft.genre=unknown


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