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Application of a combined optical-passive microwave method to retrieve soil moisture at regional scale over Chile

hal.structure.identifierDepartamento de Ciencias Ecológicas
dc.contributor.authorSANTAMARÍA-ARTIGAS, Andrès
hal.structure.identifierDepartamento de Ciencias Ecológicas
dc.contributor.authorMATTAR, Cristian
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWIGNERON, Jean-Pierre
dc.date.accessioned2024-04-08T12:11:13Z
dc.date.available2024-04-08T12:11:13Z
dc.date.issued2016
dc.identifier.issn1939-1404
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196680
dc.description.abstractEnThis work presents the calibration and evaluation of an optical-passive microwave method for retrieving soil moisture (SM) at regional scale using remote sensing and reanalysis data. Several data sets were used, such as the bipolarized brightness temperature provided by SM and Ocean Salinity (SMOS) L3 brightness temperature product, the Normalized Difference Vegetation Index (NDVI) from moderate resolution imaging spectroradiometer (MODIS), the soil temperature and water content of the first 0-7 cm of depth from the ERA-Interim reanalysis, and 13 land cover classes obtained from the ECOCLIMAP database. The method was applied over Chile between 28°S and 43°S for 2010-2012. The data set was used to calibrate and evaluate a semiempirical approach for estimating SM, first by using only the data from SMOS and ERA-Interim and then also including the MODIS vegetation indicator. Results were analyzed for every land cover class using the determination coefficient (r2), the coefficients obtained from the regressions, and the unbiased rootmean-square difference (ubRMSD). Results showed an increase in the average r2 for all classes when a vegetation index was used in the calibration of the approach. The increases in r2 ranged from 3% for the crop class, to 49% for the closed shrubland class. The ubRMSD presented a decrease in its value of up to 1% m3/m3 for the woodlands, open shrublands, and woody shrublands classes and up to 2% m3/m3 for the closed shrubland class. These results contribute to the use of single linear and semiempirical regressions to estimate SM at regional scale based on SMOS L-band bipolarized brightness temperature.
dc.language.isoen
dc.publisherIEEE
dc.subjectmicroonde passive
dc.subjecttélédétection
dc.subjectéchelle régionale
dc.subjectindice de végétation
dc.subjecttempérature de brillance
dc.subjectspectroradiomètre
dc.subjectchili
dc.subject.enERA-interim
dc.subject.enmoderate resolution imaging spectroradiometer (MODIS)
dc.subject.enNormalized Difference Vegetation Index (NDVI)
dc.subject.enSoil Moisture and Ocean Salinity (SMOS)
dc.subject.enSoil Moisture (SM)
dc.subject.enremote sensing
dc.title.enApplication of a combined optical-passive microwave method to retrieve soil moisture at regional scale over Chile
dc.typeArticle de revue
dc.identifier.doi10.1109/JSTARS.2015.2512926
dc.subject.halSciences de l'ingénieur [physics]/Traitement du signal et de l'image
bordeaux.journalIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
bordeaux.page1493-1504
bordeaux.volume9
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue4
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-01525465
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01525465v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=IEEE%20Journal%20of%20Selected%20Topics%20in%20Applied%20Earth%20Observations%20and%20Remote%20Sensing&rft.date=2016&rft.volume=9&rft.issue=4&rft.spage=1493-1504&rft.epage=1493-1504&rft.eissn=1939-1404&rft.issn=1939-1404&rft.au=SANTAMAR%C3%8DA-ARTIGAS,%20Andr%C3%A8s&MATTAR,%20Cristian&WIGNERON,%20Jean-Pierre&rft.genre=article


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