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Future Changes in Snowmelt-driven Runoff Timing over the Western United States
| Title | Future Changes in Snowmelt-driven Runoff Timing over the Western United States |
| Publication Type | Journal Article |
| Year of Publication | 2008 |
| Authors | Rauscher, S. A., J. S. Pal, N. S. Diffenbaugh, and M. M. Benedetti |
| Journal | Geophysical Research Letters |
| Volume | 35 |
| Pagination | - |
| Date Published | AUG 19 2008 |
| ISBN Number | 0094-8276 |
| Keywords | AMERICA, CALIFORNIA, CLIMATE-CHANGE IMPACTS, model, pacific-northwest, RIVER-BASIN, SIERRA-NEVADA, trends, united-states, WATER-RESOURCES |
| Abstract | We use a high-resolution nested climate model to investigate future changes in snowmelt-driven runoff (SDR) over the western US. Comparison of modeled and observed daily runoff data reveals that the regional model captures the present-day timing and trends of SDR. Results from an A2 scenario simulation indicate that increases in seasonal temperature of approximately 3 degrees to 5 degrees C resulting from increasing greenhouse gas concentrations could cause SDR to occur as much as two months earlier than present. These large changes result from an amplified snow-albedo feedback driven by the topographic complexity of the region, which is more accurately resolved in a high-resolution nested climate model. Earlier SDR could affect water storage in reservoirs and hydroelectric generation, with serious consequences for land use, agriculture, and water management in the American West. |
| DOI | DOI 10.1029/2008GL034424 |
| Reference number | 159 |
| Short Title | Future Changes in Snowmelt-driven Runoff Timing over the Western United States |
| Citation Key | 159 |