Afficher la notice abrégée

Sensitivity of Passive Microwave Observations to Soil Moisture and Vegetation Water Content: L-Band to W-Band

hal.structure.identifierCentre national de recherches météorologiques [CNRM]
dc.contributor.authorCALVET, Jean-Christophe
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWIGNERON, Jean-Pierre
hal.structure.identifierDepartment of Physics [Toronto]
dc.contributor.authorWALKER, Jeffrey
hal.structure.identifierCentre national de recherches météorologiques [CNRM]
dc.contributor.authorKARBOU, Fatima
hal.structure.identifierEnvironnement Méditerranéen et Modélisation des Agro-Hydrosystèmes [EMMAH]
dc.contributor.authorCHANZY, Andre
hal.structure.identifierEuropean Centre for Medium-Range Weather Forecasts [ECMWF]
dc.contributor.authorALBERGEL, Clément
dc.date.accessioned2024-04-08T12:12:02Z
dc.date.available2024-04-08T12:12:02Z
dc.date.issued2011
dc.identifier.issn0196-2892
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196730
dc.description.abstractEn—Ground-based multifrequency (L-band to W-band, 1.41–90 GHz) and multiangular (20 • –50 •) bipolarized (V and H) microwave radiometer observations, acquired over a dense wheat field, are analyzed in order to assess the sensitivity of brightness temperatures (T b) to land surface properties: surface soil moisture (m v) and vegetation water content (VWC). For each frequency, a combination of microwave T b observed at either two contrasting incidence angles or two polarizations is used to retrieve m v and VWC, through regressed empirical logarithmic equations. The retrieval performance of the regression is used as an indicator of the sensitivity of the microwave signal to either m v or VWC. In general, L-band measurements are shown to be sensitive to both m v and VWC, with lowest root mean square errors (0.04 m 3 · m −3 and 0.52 kg · m −2 , respectively) obtained at H polarization, 20 • and 50 • incidence angles. In spite of the dense vegetation, it is shown that m v influences the microwave observations from L-band to K-band (23.8 GHz). The highest sensitivity to soil moisture is observed at L-band in all configurations , while observations at higher frequencies, from C-band (5.05 GHz) to K-band, are only moderately influenced by m v at low incidence angles (e.g., 20 •). These frequencies are also shown to be very sensitive to VWC in all the configurations tested. The highest frequencies (Q-and W-bands) are shown to be moderately sensitive to VWC only. These results are used to analyze the response of W-band emissivities derived from the Advanced Microwave Sounding Unit instruments over northern France.
dc.language.isoen
dc.publisherInstitute of Electrical and Electronics Engineers
dc.subject.enIndex Terms—Microwave radiometry
dc.subject.ensoil moisture
dc.subject.envegetation
dc.title.enSensitivity of Passive Microwave Observations to Soil Moisture and Vegetation Water Content: L-Band to W-Band
dc.typeArticle de revue
dc.identifier.doi10.1109/TGRS.2010.2050488
dc.subject.halSciences de l'environnement
bordeaux.journalIEEE Transactions on Geoscience and Remote Sensing
bordeaux.page1190-1199
bordeaux.volume49
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue4
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-01315090
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01315090v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=IEEE%20Transactions%20on%20Geoscience%20and%20Remote%20Sensing&rft.date=2011&rft.volume=49&rft.issue=4&rft.spage=1190-1199&rft.epage=1190-1199&rft.eissn=0196-2892&rft.issn=0196-2892&rft.au=CALVET,%20Jean-Christophe&WIGNERON,%20Jean-Pierre&WALKER,%20Jeffrey&KARBOU,%20Fatima&CHANZY,%20Andre&rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée