Chris Funk Shraddhanand Shukla Daniel McEvoy Emily Williams 2020 Human-induced (HI) warming increased Four Corners’ air temperatures by between +1.3 and +2°C, increasing vapor pressure deficits and reducing NDVI by ~16-30%. Without HI warming, March SWE would have been higher by ~20%. application/pdf 10.1175/BAMS-D-19-0187.1 en America Meteorological Society Quantifying human-induced temperature impacts on the 2018 United States Four Corners drought article