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Transcript
Major Topic/Science Question and reason for rapid publication (255 characters): We address the question of how temperature- and precipitation-driven snowpack variability respond to changes in climate. This is an urgent question posed by a 2015 GRL article restricted to historical observations. New Scientific Knowledge and scientific advances allowed (255 characters): We discover that expanded elevations of snowpack are vulnerable to interannual temperature variations under climate change. The density of our data also informs a reformulation of correlation-elevation models previously inferred from sparse observations. Broad Implications and scientific communities impacted (255 characters): We characterize climate change-driven modifications to snowpack variability across a large spatial domain (the western U.S). These results have broad implications for hydrology, ecology, and climate change research at the local, state, and regional level. Key Points (140 characters): Dynamical downscaling reveals threshold elevations (1574-2119 m) dividing precipitation- and temperature-driven snowpack variability These thresholds rise 317 m on average across six mountainous regions under moderate endof-century climate change The threshold elevation shift generally overtakes a range’s lower tier, but reaches mountain peaks in modest topography
