气候变化领域集成服务门户(CCPortal): GRACE satellite-based drought index indicating increased impact of drought over major basins in China during 2002-2017

CCPortal

DOI	10.1016/j.agrformet.2020.108057
	GRACE satellite-based drought index indicating increased impact of drought over major basins in China during 2002-2017
	Liu, Xianfeng; Feng, Xiaoming; Ciais, Philippe; Fu, Bojie; Hu, Baoyi; Sun, Zhangli
通讯作者	Feng, XM (通讯作者)
发表日期	2020
ISSN	0168-1923
EISSN	1873-2240
卷号	291
英文摘要	The frequency of recurrence of drought has major societal, economical, and environmental impacts. However, our ability to capture drought conditions accurately are limited due to the uncertainties in current drought indices. In the present study, we proposed a Gravity Recovery and Climate Experiment (GRACE) total water storage (TWS) based drought severity index (DSI) using the detrended GRACE-TWS time series, to eliminate the effect of non-climatic factors on drought estimation and reflect true drought conditions. Based on the improved GRACE-DSI, we characterized the drought conditions over major basins in China during 2002-2017. Our results indicate that the improved GRACE-DSI can reasonably capture the drought process compared to existing non-detrended GRACE-based drought indices. The observed behavior of GRACE-DSI time series agrees reasonably well with the Palmer drought severity index, standardized precipitation index, and standardized runoff index, although differences exist due to intrinsic differences in the indicators of drought. Spatially, the Yellow River Basin, Huai River Basin, Hai River Basin, Southwest River Basin, and Continental River Basin share a similar pattern with droughts prevailing after 2013, and with both increases in duration and severity of the drought episodes. Moreover, pixel-based drought assessment also suggests an increasing trend in drought frequency in most basins in China during the GRACE era, with a prominent drought event in the Southwest River Basin beginning in April 2015 and ending in May 2016, with a severity of -25.38 and affecting 39.47 % of the total basin area. Our analyses demonstrate that the proposed GRACE-DSI can serve as a useful tool for integrated drought monitoring and provide a better understanding of drought conditions in major basins in China during 2002-2017.
关键词	WATER STORAGE DEFICIT GRIDDED DATASET SEVERITY INDEX SOIL-MOISTURE UNITED-STATES RIVER-BASIN VARIABILITY TRENDS MODEL
英文关键词	Drought assessment; Drought duration; Drought severity; Drought frequency; GRACE satellite
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000556177600019
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
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/260055
推荐引用方式 GB/T 7714	Liu, Xianfeng,Feng, Xiaoming,Ciais, Philippe,et al. GRACE satellite-based drought index indicating increased impact of drought over major basins in China during 2002-2017[J]. 中国科学院青藏高原研究所,2020,291.
APA	Liu, Xianfeng,Feng, Xiaoming,Ciais, Philippe,Fu, Bojie,Hu, Baoyi,&Sun, Zhangli.(2020).GRACE satellite-based drought index indicating increased impact of drought over major basins in China during 2002-2017.AGRICULTURAL AND FOREST METEOROLOGY,291.
MLA	Liu, Xianfeng,et al."GRACE satellite-based drought index indicating increased impact of drought over major basins in China during 2002-2017".AGRICULTURAL AND FOREST METEOROLOGY 291(2020).