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H12L-0840: Climate Driven Changes in Snow Regime Classifications of the Continental United States (AGU 2022, Poster Session H12L)
  • Molly E Tedesche,
  • Travis A Dahl,
  • Jeremy J Giovando
Molly E Tedesche

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Travis A Dahl
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Jeremy J Giovando
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Much of the world’s water resource infrastructure is experiencing rapid shifts in climate and snowmelt. Changing snowmelt regimes are responsible for rain-on-snow river flooding, putting communities at risk. Our study uses a new Snow Regime Classification system as a proxy for tracking climate driven changes in hydrology across the contiguous US over 40 years (1981-2020). Snow regimes are calculated annually, with changes evaluated across decadal and 30-year time scales. Our Snow Regime technique designates areas across CONUS as: (1) rain dominated (RD), (2) snow dominated (SD), (3) transitional (transient mix of rain and snow; R/S), or (4) as perennial snow cover (PS). Class thresholding ratios involve snow water equivalent (SWE) over cumulative cool-season precipitation (October through March).  
31 Jan 2023Submitted to ESS Open Archive
09 Feb 2023Published in ESS Open Archive