Technical note: Precipitation-phase partitioning at landscape scales to regional scales
| Autor: | Elissa Lynn, John T. Abatzoglou, Aaron Cuthbertson, Peter Coombe, Jordi P. Vasquez, Minxue He, Benjamin J. Hatchett, Michael L. Anderson |
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| Rok vydání: | 2020 |
| Předmět: |
010504 meteorology & atmospheric sciences
0207 environmental engineering Water supply 02 engineering and technology lcsh:Technology 01 natural sciences lcsh:TD1-1066 Precipitation lcsh:Environmental technology. Sanitary engineering 020701 environmental engineering Rain and snow mixed lcsh:Environmental sciences 0105 earth and related environmental sciences lcsh:GE1-350 lcsh:T business.industry Water storage lcsh:Geography. Anthropology. Recreation Elevation Snowpack lcsh:G Climatology Spatial ecology Environmental science Scale (map) business |
| Zdroj: | Hydrology and Earth System Sciences, Vol 24, Pp 5317-5328 (2020) |
| ISSN: | 1607-7938 |
| DOI: | 10.5194/hess-24-5317-2020 |
| Popis: | Water management throughout the western United States largely relies on the partitioning of cool season mountain precipitation into rain and snow, particularly snow as it maximizes available water for warm season use. Recent studies indicate a shift toward increased precipitation falling as rain, which is consistent with a warming climate. An approach is presented to estimate precipitation-phase partitioning across landscapes from 1948 to the present by combining fine-scale gridded precipitation data with coarse-scale freezing level and precipitation data from an atmospheric reanalysis. A marriage of these data sets allows for a new approach to estimate spatial patterns and trends in precipitation partitioning over elevational and latitudinal gradients in major water supply basins. This product is used in California as a diagnostic indicator of changing precipitation phase across mountain watersheds. Results show the largest increases in precipitation falling as rain during the past 70 years in lower elevation watersheds located within the climatological rain–snow transition regions of northern California during spring. Further development of the indicator can inform adaptive water management strategy development and implementation in the face of a changing climate. |
| Databáze: | OpenAIRE |
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