Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027158 |
Understanding the asymmetry of annual streamflow responses to seasonal warming in the Western U.S. | |
Zhaoxin Ban; Tapash Das; Dan Cayan; Mu Xiao; Dennis P. Lettenmaier | |
2020-11-17 | |
发表期刊 | Water Resources Research |
出版年 | 2020 |
英文摘要 | The response of annual runoff volume to sub‐annual climate warming is highly uncertain and the governing mechanisms remain poorly understood, challenging adaptive water management. A typical exemplar is the Western U.S., where climate models project substantially stronger warming in the warm season (Apr‐Sep) than in the cool season (Oct‐Mar). We investigate the asymmetrical responses of annual and seasonal streamflow changes to warm season and cool season warming for four regionally important basins in the Western U.S. using an ensemble of four land surface (hydrological) models. Our results show that: (i) the general features of seasonal and annual streamflow responses to asymmetrical warming are consistent across models, although the magnitudes vary. The multi‐model mean shows annual runoff declining from 2.0% up to 7.5% under 3°C warm season warming, and from 2.2% up to 4.7% under 3°C cool season warming across the four basins. (ii) The asymmetry of the seasonal evapotranspiration sensitivity to temperature constrains the asymmetry of annual streamflow responses to seasonal warming; and (iii) basins with characteristics such as high ratios of warm to cool season gross incoming water, cooler summers, and colder winters have the strongest relative annual streamflow decreases for warm season warming relative to cool season warming. The pattern in (iii) is explained by the variation of evapotranspiration‐temperature sensitivity in response to a compound set of processes, including the enhanced rate of water holding capacity increase with warmer temperatures, temperature‐related snowmelt‐albedo feedback, and enhanced surface resistance with warmer temperatures. |
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/304308 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Zhaoxin Ban,Tapash Das,Dan Cayan,et al. Understanding the asymmetry of annual streamflow responses to seasonal warming in the Western U.S.[J]. Water Resources Research,2020. |
APA | Zhaoxin Ban,Tapash Das,Dan Cayan,Mu Xiao,&Dennis P. Lettenmaier.(2020).Understanding the asymmetry of annual streamflow responses to seasonal warming in the Western U.S..Water Resources Research. |
MLA | Zhaoxin Ban,et al."Understanding the asymmetry of annual streamflow responses to seasonal warming in the Western U.S.".Water Resources Research (2020). |
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