干旱区生态环境知识资源中心(Arid): Why Is the Terrestrial Water Storage in Dryland Regions Declining? A Perspective Based on Gravity Recovery and Climate Experiment Satellite Observations and Noah Land Surface Model With Multiparameterization Schemes Model Simulations

Arid

DOI	10.1029/2020WR027102
	Why Is the Terrestrial Water Storage in Dryland Regions Declining? A Perspective Based on Gravity Recovery and Climate Experiment Satellite Observations and Noah Land Surface Model With Multiparameterization Schemes Model Simulations
	Chang, Li-Ling; Yuan, Ruiqiang; Gupta, Hoshin, V; Winter, C. Larrabee; Niu, Guo-Yue
通讯作者	Niu, GY
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2020
卷号	56 期号:11
英文摘要	Drylands cover over 40% of the global land area and are home to more than 2 billion humans. Here, we use the terrestrial water storage (TWS) anomaly data derived from GRACE satellites to assess water storage changes globally and find that drylands lost similar to 15.9 +/- 9.1 mm of water between April 2002 and January 2017. The TWS trends are more significant and apparent in dry regions than in humid regions. The decrease in TWS occurred mainly in hyperarid and arid regions. Exact causes to the observed declines in TWS remain elusive due to anthropogenic water withdrawals, atmospheric demand (potential evapotranspiration, PET) in contrast to supply (precipitation, P) caused by the warming, and terrestrial ecohydrological responses. Therefore, we use a process-based model forced by climate data to interpret the causes over three selected dryland regions showing the strongest drying trends. We find that the modeled TWS without considering anthropogenic water withdrawals explains most of the declining GRACE TWS over the southwestern North America (NA) and Middle East but underestimates the drying trend over North China. This suggests that TWS declines in the southwestern NA and the Middle East were primarily driven by the contrast between atmospheric demand and supply, whereas anthropogenic water withdrawals may have played a relatively more dominant role in TWS declines over North China. Additional model experiments indicate that terrestrial ecohydrological processes that help extract deep substrate water are critical for providing water supply additional to precipitation to sustain ET in the drying drylands at decadal scales.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000595832300041
WOS关键词	GROUNDWATER DEPLETION ; MIDDLE-EAST ; SEMIARID ECOSYSTEMS ; GRACE DATA ; VARIABILITY ; TRENDS ; SOIL ; CYCLE ; EARTH ; GREENNESS
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327854
作者单位	[Chang, Li-Ling; Gupta, Hoshin, V; Winter, C. Larrabee; Niu, Guo-Yue] Univ Arizona, Dept Hydrol & Atmospher Sci, Tucson, AZ 85721 USA; [Yuan, Ruiqiang] Shanxi Univ, Sch Environm & Resource, Taiyuan, Peoples R China
推荐引用方式 GB/T 7714	Chang, Li-Ling,Yuan, Ruiqiang,Gupta, Hoshin, V,et al. Why Is the Terrestrial Water Storage in Dryland Regions Declining? A Perspective Based on Gravity Recovery and Climate Experiment Satellite Observations and Noah Land Surface Model With Multiparameterization Schemes Model Simulations[J]. University of Arizona,2020,56(11).
APA	Chang, Li-Ling,Yuan, Ruiqiang,Gupta, Hoshin, V,Winter, C. Larrabee,&Niu, Guo-Yue.(2020).Why Is the Terrestrial Water Storage in Dryland Regions Declining? A Perspective Based on Gravity Recovery and Climate Experiment Satellite Observations and Noah Land Surface Model With Multiparameterization Schemes Model Simulations.WATER RESOURCES RESEARCH,56(11).
MLA	Chang, Li-Ling,et al."Why Is the Terrestrial Water Storage in Dryland Regions Declining? A Perspective Based on Gravity Recovery and Climate Experiment Satellite Observations and Noah Land Surface Model With Multiparameterization Schemes Model Simulations".WATER RESOURCES RESEARCH 56.11(2020).