Meteosat second generation data for assessment of surface moisture status

Simon Stisen, Inge Sandholt, Rasmus Fensholt

Research output: Contribution to journalConference article in journalpeer-review

Abstract

Two approaches for estimation of remotely sensed land surface temperature, Ts, based on MSG-SEVIRI data have been tested in a semi-arid environment in West Africa. A local algorithm, based on in situ measured Ts and a regional algorithm, based on MODIS LST products. They are both based on the split-window technique and show encouraging results, however applications are limited to the region for which they are derived. The land surface temperature and vegetation index (NDVI) has in combination been used as an indicator of soil moisture and/or evapotranspiration through a dryness index. The index, denoted TVDI, is based on an evaluation of the Ts/NDVI space. The introduction of MSG-SEVERI data in the estimation of Ts and TVDI offers new possibilities in the application of these parameters since the improved temporal resolution allows for analysis of diurnal variations and greater likelihood of finding cloud free pixels. Plots of diurnal variation in TVDI for selected locations show little variation around midday, suggesting that the index is relatively independent of diurnal variations in Ts.

Original languageEnglish
Pages (from-to)155-160
Number of pages6
JournalEuropean Space Agency, (Special Publication) ESA SP
Volume582
Publication statusPublished - 2004
Externally publishedYes
EventSecond MSG RAO Workshop - Salzburg, Austria
Duration: 9 Sep 200410 Sep 2004

Programme Area

  • Programme Area 2: Water Resources

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