Parsing the contributions of ocean forcings and atmospheric variability to spatially widespread droughts in the contiguous United States

Jason E Smerdon1, Seung H. H. Baek2, Richard Seager3 and Benjamin Cook1, (1)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (2)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (3)Columbia University, Lamont-Doherty Earth Observatory, Palisades, NY, United States