TY - RPRT TI - Assessing the risk persistent drought using climate model simulations and paleoclimate data AU - Toby R. Ault AU - Julia E. Cole AU - Jonathan T. Overpeck AU - Gregory T. Pederson AU - David M. Meko PY - 2014 DO - 10.1175/jcli-d-12-00282.1 UR - https://pubs.usgs.gov/publication/70155825 ID - 70155825 ER -