A Full-Spectrum Bedrock Thermal Expansion Model and Its Impact on the Global Positioning System Height Time Series

doi:10.1029/2019GL086022

GSTDTAP > 气候变化

DOI	10.1029/2019GL086022
	A Full-Spectrum Bedrock Thermal Expansion Model and Its Impact on the Global Positioning System Height Time Series
	Lei, Jintao 1; Chen, Wu 1; Li, Zhao 1; Li, Fei 2; Zhang, Shengkai 2
	2020-01-16
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2020
卷号	47 期号:1
文章类型	Article
语种	英语
国家	Peoples R China
英文摘要	Bedrock thermal expansion includes prominent seasonal (annual and semiannual) terms and intricate nonseasonal variations (high-frequency change and transient signals). However, the nonseasonal variations are usually ignored in geodetic studies due to defects in analytical solutions. In this study, we calculate the full-spectrum bedrock thermal expansion displacement using the skin temperature from the ERA5 reanalysis data set. The results show that the nonseasonal variations of bedrock thermal expansion, with a range (maximum minus minimum) reaching 3 mm in some regions, can be observed by geodetic instruments and thus cannot be ignored. Moreover, the mean power of the nonseasonal variations accounts for 20% of the entire thermal expansion. Without considering the influence of the nonseasonal variations, this "noise" would remain in the original observations and contaminate related geophysical inversions.
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000513983400036
WOS关键词	DIFFERENT SPATIAL SCALES ; SEASONAL-VARIATIONS ; GPS ; DEFORMATION ; WATER ; REGION ; GRACE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/279501
专题	气候变化
作者单位	1.Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, Hong Kong, Peoples R China; 2.Wuhan Univ, Chinese Antarctic Ctr Surveying & Mapping, Wuhan, Peoples R China
推荐引用方式 GB/T 7714	Lei, Jintao,Chen, Wu,Li, Zhao,et al. A Full-Spectrum Bedrock Thermal Expansion Model and Its Impact on the Global Positioning System Height Time Series[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(1).
APA	Lei, Jintao,Chen, Wu,Li, Zhao,Li, Fei,&Zhang, Shengkai.(2020).A Full-Spectrum Bedrock Thermal Expansion Model and Its Impact on the Global Positioning System Height Time Series.GEOPHYSICAL RESEARCH LETTERS,47(1).
MLA	Lei, Jintao,et al."A Full-Spectrum Bedrock Thermal Expansion Model and Its Impact on the Global Positioning System Height Time Series".GEOPHYSICAL RESEARCH LETTERS 47.1(2020).