Analysis of systematic differences from GPS-measured and GRACE-modeled deformation in Central Valley, California

	Analysis of systematic differences from GPS-measured and GRACE-modeled deformation in Central Valley, California
	Tan, Weijie1,3 ; Dong, Danan 2; Chen, Junping1 ; Wu, Bin1
刊名	ADVANCES IN SPACE RESEARCH
	2016
卷号	57 期号:1 页码:19-29
关键词	Crustal seasonal displacement Discrepancy GPS GRACE
英文摘要	Crustal seasonal displacement signals, which are commonly attributed to surface mass redistributions, can be measured by continuous GPS, modeled by GRACE and loading models. Previous studies have shown that the three methods generally agree with one another. However, the discrepancy among them in some regions has not yet been investigated comprehensively. In this paper, we compare the vertical annual displacement signals in the Central Valley, California derived from GPS, GRACE and loading models. The results show a general agreement from these three methods for most sites, which reach the maximum during the dry late summer and autumn. Irregular annual terms with peaks during the wet winter and spring are detected from GPS solutions for the sites located in places with extensive groundwater depletion. However, annual vertical variations for these same sites derived from GRACE and loading models reach the maximum in August and minimum in February. To explain such apparent discrepancy, we find that the vertical components of abnormal sites show a strong correlation with in situ groundwater data, which display peaks during cold months. In addition, with the assistance of water table depth data, we perform hydrological simulations based on Terzaghi's Principle, Mogi's Model and Green's function method. The results suggest that the discrepancy from GPS-measured and GRACE-modeled deformation is induced by the seasonal variations of groundwater. (C) 2015 COSPAR. Published by Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
研究领域[WOS]	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
关键词[WOS]	MOTION ; WATER ; EARTH ; COMPACTION ; SPACE ; LOADS ; FIELD
收录类别	SCI
语种	英语
WOS记录号	WOS:000368564300003
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/28542]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.E China Normal Univ, Sch Informat Sci & Technol, Shanghai 200242, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Tan, Weijie,Dong, Danan,Chen, Junping,et al. Analysis of systematic differences from GPS-measured and GRACE-modeled deformation in Central Valley, California[J]. ADVANCES IN SPACE RESEARCH,2016,57(1):19-29.
APA	Tan, Weijie,Dong, Danan,Chen, Junping,&Wu, Bin.(2016).Analysis of systematic differences from GPS-measured and GRACE-modeled deformation in Central Valley, California.ADVANCES IN SPACE RESEARCH,57(1),19-29.
MLA	Tan, Weijie,et al."Analysis of systematic differences from GPS-measured and GRACE-modeled deformation in Central Valley, California".ADVANCES IN SPACE RESEARCH 57.1(2016):19-29.