Show simple item record

A statistical calibration for a combined Optical-Passive microwave method using remote sensing and reanalysis data

hal.structure.identifierUniversidad de Chile = University of Chile [Santiago] [UCHILE]
dc.contributor.authorMATTAR, Cristian
hal.structure.identifierUniversidad de Chile = University of Chile [Santiago] [UCHILE]
dc.contributor.authorSANTAMARÍA-ARTIGAS, Andrès
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWIGNERON, Jean-Pierre
hal.structure.identifierEuropean Centre for Medium-Range Weather Forecasts [ECMWF]
dc.contributor.authorDE ROSNAY, Patricia
dc.date.accessioned2024-04-08T11:58:15Z
dc.date.available2024-04-08T11:58:15Z
dc.date.issued2014
dc.date.conference2014-09-22
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195915
dc.description.abstractEnThis work presents a statistical calibration of a semi-empirical combined optical-passive microwave remote sensing method to estimate surface soil moisture at regional scale. The proposed method uses satellite data provided from different sensors such as: bi-polarized brightness temperature at L-band given by the Soil Moisture Ocean Satellite (SMOS) level 2 product (SMUDP2), the Normalized Difference Vegetation Index (NDVI) and Land surface Temperature (LST) derived from MODIS (MOD13Q1 and MOD 11A1 respectively), the LST obtained by GOES GEOLAND2 products, the surface soil moisture (Volumetric soil water layer 0 – 7 cm) and the skin temperature provided by the ECWMF (ERA-interim). The NDVI was interpolated at temporal (daily) and spatial (from 250 m to 10 km) resolutions in order to assess the influences of this vegetation indicator on the semi-empirical approach. Results shown the use of vegetation index such as the NDVI improve the calibration of the semi-empirical approach. The improvements of the coefficient of determination (r2) increase between 2 and 20% at using NDVI in comparison to setting NDVI equal to zero. The use of LST in the calibration of the semi-empirical approach can be considered as a possible indicator of the effective temperature. The three LST data sources have not shown high differences in the calibration approach (p-value > 0.05) in relation to the use of effective temperature. A partial evaluation of soil moisture estimates were performed without statistical significance results. Finally, this work contributes to the use of synergic optical-passive microwave approach which can improve the soil moisture estimation based on remote sensing data at regional scale.
dc.language.isoen
dc.title.enA statistical calibration for a combined Optical-Passive microwave method using remote sensing and reanalysis data
dc.typeAutre communication scientifique (congrès sans actes - poster - séminaire...)
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
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
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.title4th International Symposium on Recent Advances in Quantitative Remote Sensing: RAQRS'IV
bordeaux.countryES
bordeaux.conference.cityTorrent (Valencia)
bordeaux.peerReviewedoui
hal.identifierhal-02743936
hal.version1
hal.invitednon
hal.conference.organizerUniversitat de València (UV). ESP.
hal.conference.end2014-09-26
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02743936v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2014&rft.au=MATTAR,%20Cristian&SANTAMAR%C3%8DA-ARTIGAS,%20Andr%C3%A8s&WIGNERON,%20Jean-Pierre&DE%20ROSNAY,%20Patricia&rft.genre=conference


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record