{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T06:22:42Z","timestamp":1772086962155,"version":"3.50.1"},"reference-count":74,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2022,4,9]],"date-time":"2022-04-09T00:00:00Z","timestamp":1649462400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Surface water stress remote sensing indices can be very helpful to monitor the impact of drought on agro-ecosystems, and serve as early warning indicators to avoid further damages to the crop productivity. In this study, we compare indices from three different spectral domains: the plant water use derived from evapotranspiration retrieved using data from the thermal infrared domain, the root zone soil moisture at low resolution derived from the microwave domain using the Soil Water Index (SWI), and the active vegetation fraction cover deduced from the Normalized Difference Vegetation Index (NDVI) time series. The thermal stress index is computed from a dual-source model Soil Plant Atmosphere and Remote Evapotranspiration (SPARSE) that relies on meteorological variables and remote sensing data. In order to extend in time the available meteorological series, we compare the use of a statistical downscaling method applied to reanalysis data with the use of the unprocessed reanalysis data. Our study shows that thermal indices show comparable performance overall compared to the SWI at better resolution. However, thermal indices are more sensitive for a drought period and tend to react quickly to water stress.<\/jats:p>","DOI":"10.3390\/rs14081813","type":"journal-article","created":{"date-parts":[[2022,4,9]],"date-time":"2022-04-09T05:13:08Z","timestamp":1649481188000},"page":"1813","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Analysis of Multispectral Drought Indices in Central Tunisia"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1568-7143","authenticated-orcid":false,"given":"Nesrine","family":"Farhani","sequence":"first","affiliation":[{"name":"Institut National Agronomique de Tunisie, Universit\u00e9 de Carthage, LR17AGR01 (Lr GREEN-TEAM), Tunis 1082, Tunisia"},{"name":"Centre d\u2019\u00c9tudes Spatiales de la Biosph\u00e8re, Universit\u00e9 de Toulouse, CNRS, CNES, IRD, UPS, INRAE, 31400 Toulouse, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0935-9138","authenticated-orcid":false,"given":"Julie","family":"Carreau","sequence":"additional","affiliation":[{"name":"Department of Mathematics and Industrial Engineering, Polytechnique, Montreal, QC 3453, Canada"}]},{"given":"Zeineb","family":"Kassouk","sequence":"additional","affiliation":[{"name":"Institut National Agronomique de Tunisie, Universit\u00e9 de Carthage, LR17AGR01 (Lr GREEN-TEAM), Tunis 1082, Tunisia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0671-2418","authenticated-orcid":false,"given":"Michel","family":"Le Page","sequence":"additional","affiliation":[{"name":"Centre d\u2019\u00c9tudes Spatiales de la Biosph\u00e8re, Universit\u00e9 de Toulouse, CNRS, CNES, IRD, UPS, INRAE, 31400 Toulouse, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0578-1630","authenticated-orcid":false,"given":"Zohra","family":"Lili Chabaane","sequence":"additional","affiliation":[{"name":"Institut National Agronomique de Tunisie, Universit\u00e9 de Carthage, LR17AGR01 (Lr GREEN-TEAM), Tunis 1082, Tunisia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3905-7560","authenticated-orcid":false,"given":"Gilles","family":"Boulet","sequence":"additional","affiliation":[{"name":"Centre d\u2019\u00c9tudes Spatiales de la Biosph\u00e8re, Universit\u00e9 de Toulouse, CNRS, CNES, IRD, UPS, INRAE, 31400 Toulouse, France"}]}],"member":"1968","published-online":{"date-parts":[[2022,4,9]]},"reference":[{"key":"ref_1","unstructured":"Wilhite, D.A., and Svoboda, M.D. (2000). 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