Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR030367 |
Asymmetry of Western U.S. river basin sensitivity to seasonally varying climate warming | |
Zhaoxin Ban; Dennis P. Lettenmaier | |
2022-02-14 | |
发表期刊 | Water Resources Research |
出版年 | 2022 |
英文摘要 | Future climate warming over the Western U.S. (WUS) is projected to be greater in summer than winter. Previous model-based studies of large river basins in the WUS showed much different annual streamflow responses to warming in warm vs. cool seasons. However, it remains unclear how are the annual streamflow relative responses to seasonal warming (asymmetry) and drivers of the response asymmetry vary across the entire WUS at the catchment-scale, and how the simulated results compare with observations. Here, we investigate the asymmetry of annual streamflow responses to warm vs. cool season warming at the HUC-8 level across the entire WUS using model simulations and observations. We also examine the asymmetries’ relationship with land surface and hydroclimate characteristics, and the primary contributor to the response asymmetry for each HUC-8 basin. The HUC-8 level results reveal more complexity than do earlier analyses of much larger river basins. Over 25% of WUS area has annual streamflow increases in response to warming in at least one season (mostly cool season). Annual streamflow is most sensitive to warm season warming in cool, inland basins, especially the northern Columbia River basin and most of the Upper Colorado River Basin, and most sensitive to cool season warming in warm, coastal basins. This bi-directional pattern is enhanced by vegetation coverage but weakened by long-term snowpack decline. In coldest basins with short snow-free seasons, net radiation changes dominate the streamflow response asymmetry. For basins with cold-to-intermediate temperatures, vapor pressure deficit changes dominate. For warmest basins, surface resistance changes dominate. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
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/346686 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Zhaoxin Ban,Dennis P. Lettenmaier. Asymmetry of Western U.S. river basin sensitivity to seasonally varying climate warming[J]. Water Resources Research,2022. |
APA | Zhaoxin Ban,&Dennis P. Lettenmaier.(2022).Asymmetry of Western U.S. river basin sensitivity to seasonally varying climate warming.Water Resources Research. |
MLA | Zhaoxin Ban,et al."Asymmetry of Western U.S. river basin sensitivity to seasonally varying climate warming".Water Resources Research (2022). |
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