气候变化领域集成服务门户(CCPortal): General overestimation of ERA5 precipitation in flow simulations for High Mountain Asia basins

CCPortal

DOI	10.1088/2515-7620/ac40f0
	General overestimation of ERA5 precipitation in flow simulations for High Mountain Asia basins
	Sun, He; Su, Fengge; Yao, Tandong; He, Zhihua; Tang, Guoqiang; Huang, Jingheng; Zheng, Bowen; Meng, Fanchong; Ou, Tinghai; Chen, Deliang
通讯作者	Su, FG (通讯作者)
发表日期	2021
ISSN	2515-7620
卷号	3 期号:12
英文摘要	Precipitation is one of the most important input to hydrological models, although obtaining sufficient precipitation observations and accurate precipitation estimates in High Mountain Asia (HMA) is challenging. ERA5 precipitation is the latest generation of reanalysis dataset that is attracting huge attention from various fields but it has not been evaluated in hydrological simulations in HMA. To remedy this gap, we first statistically evaluated ERA5 precipitation with observations from 584 gauges in HMA, and then investigated its potential in hydrological simulation in 11 HMA basins using the Variable Infiltration Capacity (VIC) hydrological model. The ERA5 precipitation generally captures the seasonal variations of gauge observations, and the broad spatial distributions of precipitation in both magnitude and trends in HMA. The ERA5 exhibits a reasonable flow simulation (RB of 5%-10%) at the Besham hydrological station of the upper Indus (UI) basin when the contribution from glacier runoff is added to the simulated total runoff. But it overestimates the observations in other HMA basins by 33%-106% without considering glacier runoff, mostly due to the overestimates in the ERA5 precipitation inputs. Therefore, a bias correction is definitely needed before ERA5 precipitation is used for hydrological simulations in HMA basins.
关键词	UPSTREAM RIVER-BASINS UPPER INDUS BASIN TIBETAN PLATEAU QUANTITATIVE ASSESSMENT CLIMATE WATER VARIABILITY REANALYSIS DATASETS INTERIM
英文关键词	ERA5; Precipitation Evaluation; Hydrological Simulation; High Mountain Asia; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000730939300001
来源期刊	ENVIRONMENTAL RESEARCH COMMUNICATIONS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260441
推荐引用方式 GB/T 7714	Sun, He,Su, Fengge,Yao, Tandong,et al. General overestimation of ERA5 precipitation in flow simulations for High Mountain Asia basins[J]. 中国科学院青藏高原研究所,2021,3(12).
APA	Sun, He.,Su, Fengge.,Yao, Tandong.,He, Zhihua.,Tang, Guoqiang.,...&Chen, Deliang.(2021).General overestimation of ERA5 precipitation in flow simulations for High Mountain Asia basins.ENVIRONMENTAL RESEARCH COMMUNICATIONS,3(12).
MLA	Sun, He,et al."General overestimation of ERA5 precipitation in flow simulations for High Mountain Asia basins".ENVIRONMENTAL RESEARCH COMMUNICATIONS 3.12(2021).