Mapping meteorological drought hazard, Mapping agricultural drought hazard, Mapping hydrological drought hazard

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eng

World

World

Mapping meteorological drought hazard, Mapping agricultural drought hazard, Mapping hydrological drought hazard

Data requirements to use: N/A;

Data used: Evapotranspiration and potential evapotranspiration from the MODIS MOD16 evapotranspiration data product

Normalized Difference Vegetation Index from the MODIS MOD13 vegetation indices product;

Data format: .hdf;

Data access: FTP;

Concise description:

The remotely-sensed DSI uses operational global land products derived from NASA satellite observations, namely the MODIS terrestrial evapotranspiration (ET) and vegetation greenness products. ET is a metric of ecosystem functional status and is directly related to the water, carbon and energy cycles of the land surface. The ratio of ET to potential ET (PET) is commonly used as an indicator of terrestrial water availability and associated wetness or drought. Satellite vegetation greenness indices (VIs), especially the Normalized Difference VI (NDVI), can potentially link climate changes (e.g. increasing frequency and severity of drought) and vegetation responses with land-atmosphere water, carbon and energy fluxes, and associated climate feedbacks (Atkinson et al., 2011). The DSI incorporates NDVI and the ratio of ET to PET into a single index theoretically ranging from unlimited negative values (drier than normal) to unlimited positive values (wetter than normal). More detailed information on the DSI can be found in Mu et al. (2013).

eng

MODIS Global Terrestrial Drought Severity Index

ISO 19115:2003/19139

1.0

http://www.ntsg.umt.edu/project/modis/dsi.php