气候变化领域集成服务门户(CCPortal): Subsurface structure regulates water storage in the alpine critical zone on the Qinghai-Tibet Plateau

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DOI	10.1016/j.jhydrol.2023.130357
	Subsurface structure regulates water storage in the alpine critical zone on the Qinghai-Tibet Plateau
	Zuo, Fenglin; Li, Xiaoyan; Yang, Xiaofan; Shi, Fangzhong; Ma, Yujun; Ouyang, Wei
发表日期	2023
ISSN	0022-1694
EISSN	1879-2707
卷号	627
英文摘要	The subsurface critical zone (CZ) structure in alpine regions has a profound influence on water storage that is not well understood due to a lack of available accurate spatiotemporal measurements. This work is to reveal that the organic layer (A), leaching-deposit layer (B), saprolite layer (C) and freeze-thaw processes regulate changes in subsurface liquid water storage (CSWS). We performed in situ field surveys, ground-penetrating radar (GPR) and electrical resistivity tomography (ERT) along an elevation gradient (4221-3205 m) in the Qinghai Lake Basin Critical Zone Observatory (QLBCZO) on the Qinghai-Tibet Plateau. The results showed that the saprolite layer (thickness of 0.84-41.85 m) and the liquid water storage (SWS) increased along the decreasing elevation. The saprolite layer was the main subsurface liquid water storage reservoir, with average value of 595.49 +/- 729.87 mm, which occupied 76.10 % of the total water storage of layers A, B and C. The SWS of the saprolite layers increased the most, by 39.41 mm and 45.88 mm in the thawing and nonfreezing periods, respectively, and that of layer B decreased maximally by 52.50 mm in the freezing period. The subsurface layer and elevation had the contribution to SWS at 68.07 % during the nonfreezing period. Comparing other climate and environmental factors, the seasonal frozen thickness (SFT) and precipitation contributed most to CSWS during the thawing and freezing period (27.95 % and 19.87 %), respectively. This study contributes to advancing the mechanistic understanding of the interactions between the subsurface CZ structure and water storage processes and provides high-quality data with which coupled ecohydrological models can be developed.
关键词	Subsurface critical zone structure Subsurface liquid water storage Geophysical technologies Representative ecosystems Alpine critical zone
英文关键词	DEEP CRITICAL ZONE; ELECTRICAL-RESISTIVITY TOMOGRAPHY; GROUND-PENETRATING RADAR; SOIL-WATER; TEMPORAL STABILITY; PREFERENTIAL FLOW; QILIAN MOUNTAINS; LAYER THICKNESS; MOISTURE; EVAPOTRANSPIRATION
WOS研究方向	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:001111561300001
来源期刊	JOURNAL OF HYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283170
作者单位	Beijing Normal University; Beijing Normal University; Beijing Normal University; Qinghai Normal University; Qinghai Normal University; Sun Yat Sen University
推荐引用方式 GB/T 7714	Zuo, Fenglin,Li, Xiaoyan,Yang, Xiaofan,et al. Subsurface structure regulates water storage in the alpine critical zone on the Qinghai-Tibet Plateau[J],2023,627.
APA	Zuo, Fenglin,Li, Xiaoyan,Yang, Xiaofan,Shi, Fangzhong,Ma, Yujun,&Ouyang, Wei.(2023).Subsurface structure regulates water storage in the alpine critical zone on the Qinghai-Tibet Plateau.JOURNAL OF HYDROLOGY,627.
MLA	Zuo, Fenglin,et al."Subsurface structure regulates water storage in the alpine critical zone on the Qinghai-Tibet Plateau".JOURNAL OF HYDROLOGY 627(2023).