Vertical crustal deformation velocity and its influencing factors over the Qinghai-Tibet Plateau based on satellite gravity data

作     者：HuRong Duan JunGang Guo LingKang Chen JiaShuang Jiao HeTing Jian HuRong Duan;JunGang Guo;LingKang Chen;JiaShuang Jiao;HeTing Jian

作者机构：College of GeomaticsXi’an University of Science and TechnologyXi’an 710054China College of SciencesGuangdong University of Petrochemical TechnologyMaoming Guangdong 525000China School of Geodesy and GeomaticsWuhan UniversityWuhan 430072China State Key Laboratory of Geodesy and Earth’s DynamicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China School of Resource and Environmental EngineeringJiangxi University of Science and TechnologyGanzhou Jiangxi 341000China 

出 版 物：《Earth and Planetary Physics》 (地球与行星物理（英文版）)

年 卷 期：2022年第6卷第4期

页      面：366-377页

核心收录：

学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学] 08[工学] 0708[理学-地球物理学] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术] 

基　　金：This research was financially supported by the State Key Laboratory of Geodesy and Earth’s Dynamics(Grant No.SKLGED2022-5-2) the Innovation Academy for Precision Measurement Science and Technology,the National Natural Science Foundation of China(Grant Nos.41304013,41967038) the Natural Science Foundation of Guangdong Province(Grant No.2021A1515011487) the Guangdong University of Petrochemical Technology Talent Recruitment(No.520130). 

主　　题：GRACE(gravity recovery and climate experiment) Qinghai-Tibet Plateau crustal vertical deformation hydrological factors crustal thickness 

摘      要：The uplift of the Qinghai-Tibet Plateau(TP)strongly influences climate change,both regionally and globally.Surface observation data from this region have limited coverage and are difficult to obtain.Consequently,the vertical crustal deformation velocity(VCDV)distribution of the TP is poorly constrained.In this study,the VCDV from the TP was inverted by using data from the gravity recovery and climate experiment(GRACE).We were able to obtain the vertical crustal movement by deducting the hydrological factors,based on the assumption that the gravity signal detected by GRACE is mainly composed of hydrological factors and vertical crustal movement.From the vertical crustal movement,we inverted the distribution of the VCDV across the TP.The results showed that the VCDV of the southern,eastern,and northern TP is~1.1 mm/a,~0.5 mm/a,and−0.1 mm/a,respectively,whereas that of the region between the Qilian Haiyuan Fault and the Kunlun Fault is~0.0 mm/a.These results are consistent with the distribution of crustal deformation,thrust earthquakes and faults,and regional lithospheric activity.The hydrology,crustal thickness,and topographic factors did not change the overall distribution of the VCDV across the TP.The influence of hydrological factors is marked,with the maximum differences being approximately−0.4 mm/a in the northwest and 1.0 mm/a in the central area.The results of this study are significant for understanding the kinematics of the TP.