Diagnosing Drought in a Changing Climate
						 
					
					
					
	Abigail L. S. Swann, University of Washington, Department of Atmospheric and Climate Science and Department of Biology, Seattle, United States, Forrest M. Hoffman, Oak Ridge National Laboratory, Computational Sciences & Engineering Division, Oak Ridge, TN, United States, Charles D Koven, Lawrence Berkeley National Laboratory, Berkeley, CA, United States and James Tremper Randerson, University of California Irvine, Earth System Science, Irvine, CA, United States