Abstract
The European Space Agency's Climate Change Initiative (CCI) soil moisture (or Essential Climate Variable soil moisture) long-term database was used to assess the agricultural drought evolution. With this aim, the Soil Water Deficit Index (SWDI) was calculated with the CCI soil moisture product over the agricultural area of the Zamora province (Spain) from 1978 to 2014. The SWDI was compared with other climate-based agricultural drought indices. The results of SWDI with CCI were also compared with those obtained with two soil moisture products from the Soil Moisture and Ocean Salinity (SMOS) satellite. The results obtained are very promising and pave the way for using this new long-term soil moisture database as a useful tool for agricultural drought monitoring.
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