DOI: 10.1002/2015GL067509
论文题名: Is it possible that a gravity increase of 20 μgal yr-1 in southern Tibet comes from a wide-range density increase?
作者: Yi S. ; Wang Q. ; Sun W.
刊名: Geophysical Research Letters
ISSN: 0094-9354
EISSN: 1944-9085
出版年: 2016
卷: 43, 期: 4 起始页码: 1481
结束页码: 1486
语种: 英语
英文关键词: glacier
; GRACE
; gravity correction
; gravity increase
; lake
; Tibet
Scopus关键词: Climate models
; Geodetic satellites
; Glaciers
; Lakes
; Detectability
; GRACE
; Gravity recovery and climate experiments
; Mass accumulations
; Orders of magnitude
; Seasonal variation
; Southern Tibet
; Tibet
; Gravitation
; accumulation rate
; correction
; density
; glacier dynamics
; GRACE
; gravimetry
; gravity field
; lacustrine environment
; spatial analysis
; trend analysis
; China
; Xizang
英文摘要: With absolute gravimetric observations from 2010 to 2013 in the southern Tibet, Chen et al. (2016) reported a gravity increase of up to 20 μGal/yr and concluded that it is possible if there was a density increase in a disk range of 580 km in diameter. Here we used observations from the gravity satellites Gravity Recovery and Climate Experiment (GRACE) over 12 years to evaluate whether the model was practical, because a mass accumulation in such a large spatial range is well within the detectability ability of GRACE. The gravity trend based on their model is orders of magnitude larger than the GRACE observation, thus negating its conclusions. We then evaluated contributions from seasonal variation, lakes, glaciers, rivers, precipitation, and snowfall and concluded that these factors cannot cause such a large gravity signal. Finally, we discussed some possible explanations for the gravity increase of 40 μGal in two years. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84975698176&doi=10.1002%2f2015GL067509&partnerID=40&md5=3aad137bc9b29f763b6107526af666f7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10317
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Key Laboratory of Computational Geodynamics, University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Yi S.,Wang Q.,Sun W.. Is it possible that a gravity increase of 20 μgal yr-1 in southern Tibet comes from a wide-range density increase?[J]. Geophysical Research Letters,2016-01-01,43(4).