Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aacb38 |
Contrasting warming and drought in snowmelt-dominated agricultural basins: revealing the role of elevation gradients in regional response to temperature change | |
Gilbert, James M.1,2,3; Maxwell, Reed M.1,2 | |
2018-07-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | For snow-dominated basins like the San Joaquin in California, warmer temperatures affect hydrologic processes and stress water resources that support valuable irrigated agriculture and urban populations. Large inter-annual swings in precipitation, seen recently in California, highlight the need to better understand the effects of potential future warming combined with such extreme multi-year precipitation variability. In this study we use an integrated hydrologic model (ParFlow-CLM) to examine the effects of mean annual warming of 2 degrees C and 4 degrees C on hydrologic response over a recent wet-dry cycle (2009-2013). Simulations are performed at a 1 km resolution over the San Joaquin basin to assess the hydrologic response that bridges the local and basin scales common to many previous studies of the region. At the basin scale, warmer temperatures reduce San Joaquin River runoff by an amount consistent with the contemporary dry years: for all but the wettest year, an increase in temperature of 4 degrees C reduces simulated runoff to the baseline value of the next driest year simulated. This runoff loss can be attributed to offsetting warming-induced increases in annual evapotranspiration, subsidized in dry years by subsurface storage. Locally, hydrologic response to warming manifests as variation along an elevation gradient. The basin-wide reduction in runoff is the net balance of local increases and reductions that follow a complex function of elevation: negative mean runoff sensitivity can occur at all elevations, yet a positive runoff sensitivity exists for select locations between 2000 m and 3500 m elevation. In contrast, warming increases mean ET at all elevations in the Sierra Nevada, with the highest increase between 1000 m and 3000 m. The average increase in local runoff and ET combine to reduce percolation below the root zone in locations across the Sierra Nevada while shifting event-scale increases in recharge to Central Valley river channels. |
英文关键词 | climate change hydrology runoff San Joaquin river evapotranspiration |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000437865400002 |
WOS关键词 | JOAQUIN RIVER-BASIN ; CLIMATE-CHANGE ; SIERRA-NEVADA ; WATER-RESOURCES ; LARGE-SCALE ; CALIFORNIA ; SURFACE ; IMPACTS ; PRECIPITATION ; HYDROLOGY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35381 |
专题 | 气候变化 |
作者单位 | 1.Colorado Sch Mines, Integrated Ground Water Modeling Ctr, Geol & Geol Engn Dept, Hydrol Sci & Engn Program, Golden, CO 80401 USA; 2.IGERT, CCWAS, Davis, CA 95616 USA; 3.US Bur Reclamat, Tech Serv Ctr, Denver, CO 80225 USA |
推荐引用方式 GB/T 7714 | Gilbert, James M.,Maxwell, Reed M.. Contrasting warming and drought in snowmelt-dominated agricultural basins: revealing the role of elevation gradients in regional response to temperature change[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(7). |
APA | Gilbert, James M.,&Maxwell, Reed M..(2018).Contrasting warming and drought in snowmelt-dominated agricultural basins: revealing the role of elevation gradients in regional response to temperature change.ENVIRONMENTAL RESEARCH LETTERS,13(7). |
MLA | Gilbert, James M.,et al."Contrasting warming and drought in snowmelt-dominated agricultural basins: revealing the role of elevation gradients in regional response to temperature change".ENVIRONMENTAL RESEARCH LETTERS 13.7(2018). |
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