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Modeling and Analysis of Snowpack over the Western United States Jiming Jin

Modeling and Analysis of Snowpack over the Western United States Jiming Jin Departments of Watershed Sciences and Plants, Soils, and Climate. Trends of Snow Depth over the Western U.S. (1951-1997). Mount Hood, Oregon.

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Modeling and Analysis of Snowpack over the Western United States Jiming Jin

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  1. Modeling and Analysis of Snowpack over the Western United States Jiming Jin Departments of Watershed Sciences and Plants, Soils, and Climate

  2. Trends of Snow Depth over the Western U.S. (1951-1997)

  3. Mount Hood, Oregon

  4. Computerized projections of western United States snowfall levels in 2050 compared to present day Barnett et al., 2008

  5. Computerized snow-water amounts between now (top) and the century's end (bottom) Cannon et al., 2006

  6. The Pacific/North America Pattern (Positive) PNA = 0.25[Z (20 oN, 160 oW) -Z(45 oN, 165 oW) + Z(55 oN, 115 oW) –Z(30 oN, 85 oW)]

  7. The Pacific/North America Pattern (negative) PNA = 0.25[Z (20 oN, 160 oW) -Z(45 oN, 165 oW) + Z(55 oN, 115 oW) –Z(30 oN, 85 oW)]

  8. Snow Anomalies Over the western U.S.

  9. EOF = Empirical Orthogonal Functions

  10. Precipitation and Temperature Anomalies Over the western U.S.

  11. 500 mbGeopotential Height Anomalies

  12. Precipitation and Temperature Anomalies Over the western U.S.

  13. 500 mbGeopotential Height Anomalies

  14. Snotel Stations Over the Sierra Nevada

  15. Snow Simulations from a Regional Climate Model The Fifth Generation Mesoscale Model (MM5)/ Noah Land Surface Model

  16. Temperature Simulations from a Regional Climate Model

  17. Precipitation Simulations from a Regional Climate Model

  18. Snow Depth simulations from the Weather Research Forecasting (WRF) Model for the Columbia River Basin

  19. The snowpack in the western U.S. is significantly affected by global warming. The interanuualvariability of the atmosphere is closely correlated with the snow depth in the western U.S. Our improved version of a regional climate model can realistically simulate the snow depth, and this model can be further used to predict the amount of snow mass. Summary

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