Drought is a natural climate extreme occurring in nearly all climates. Drought is considered to be a complex phenomenon classified into four major types including meteorological, agricultural, hydrological and socioeconomic drought. Among these four types, agricultural drought refers to a period of time with a scarcity in soil moisture which could consequently result in crop failure. With the purpose of monitoring agricultural drought, several indices have been proposed based on a combination of temperature, precipitation, evapotranspiration and soil moisture. In order to improve model predictions, an accurate characterization of the uncertainty in the model state, i.e soil moisture, is critical. With droughts becoming more severe and frequent, it’s imperative for researchers to study and improve drought monitoring… Read more