%0 Conference Proceedings %T Stochastic forecasting of agricultural drought based on Palmer Drought Severity Index (PDSI) %A Shafiei, Mojtaba %A Ghahraman, Bijan %A B. Saghafian %A Ansari, Hossein %A B. Naghavi %J American Geophysical Union’s 45th annual Fall Meeting %D 2012