Derivation of Interannual Climate Elasticity of Streamflow

doi:10.1029/2020WR027703

	Derivation of Interannual Climate Elasticity of Streamflow
	Tang, Yin 1; Tang, Qiuhong 1,2; Zhang, Lu 3
刊名	WATER RESOURCES RESEARCH
	2020-11-01
卷号	56 期号:11 页码:14
关键词	terrestrial water storage change interannual variability elasticity extended Budyko framework MOPEX
ISSN号	0043-1397
DOI	10.1029/2020WR027703
通讯作者	Tang, Yin(tangqh@igsnrr.ac.cn)
英文摘要	Besides climate change (i.e., change on an average condition), streamflow change is also affected by interannual variability of climate (i.e., change from year to year). To quantify the impact of interannual climatic variability, in this study, we first clarify the content and definition of interannual climate elasticity that represents the sensitivity of streamflow to climatic variability from year to year and equals to the ratio of proportional annual change in streamflow and a climatic variable. Then, we analytically derive the interannual climate (i.e., potential evapotranspiration and precipitation) elasticities of streamflow by integrating the annual water balance with a conceptual hydrologic model (i.e., extended Budyko framework). At interannual scale, the terrestrial water storage change (i.e., increment S) is a substantial component of water balance equation. Consequently, the analytical solutions of the interannual climate elasticities are functions of precipitation, potential evapotranspiration, and increment S. The newly derived interannual climate elasticities are applied to 335 Model Parameter Estimation Experiment watersheds as a case study to evaluate the hypotheses in this study and construct the regional map of the streamflow sensitivity to interannual variability of climate. Results show that the interannual precipitation elasticity is generally larger than the absolute interannual potential evapotranspiration elasticity across study watersheds. Spatially, streamflow in the arid region tends to be more sensitive to interannual variability of climate than that in humid region. This study may be useful for understanding the extreme events and annual streamflow change caused by the increment S (e.g., groundwater abstraction) across watersheds or regions.
资助项目	National Natural Science Foundation of China[41730645] ; National Natural Science Foundation of China[41790424] ; National Natural Science Foundation of China[41901042] ; International Partnership Program of Chinese Academy of Sciences[131A11KYSB20180034] ; International Partnership Program of Chinese Academy of Sciences[131A11KYSB20170113] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA19070302]
WOS关键词	RUNOFF SENSITIVITY ; WATER-BALANCE ; HYDROLOGY ; PRECIPITATION ; COEFFICIENT ; EVAPORATION ; FRAMEWORK ; ACCURACY ; EQUATION ; IMPACTS
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000595832300034
资助机构	National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156361]
专题	中国科学院地理科学与资源研究所
通讯作者	Tang, Yin
作者单位	1.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.CSIRO Land & Water, Canberra, ACT, Australia
推荐引用方式 GB/T 7714	Tang, Yin,Tang, Qiuhong,Zhang, Lu. Derivation of Interannual Climate Elasticity of Streamflow[J]. WATER RESOURCES RESEARCH,2020,56(11):14.
APA	Tang, Yin,Tang, Qiuhong,&Zhang, Lu.(2020).Derivation of Interannual Climate Elasticity of Streamflow.WATER RESOURCES RESEARCH,56(11),14.
MLA	Tang, Yin,et al."Derivation of Interannual Climate Elasticity of Streamflow".WATER RESOURCES RESEARCH 56.11(2020):14.