摘要
以GRACECSR Mascon为模拟数据,讨论边界外扩及外扩范围内海洋信号对拟合法改正南极泄露误差的影响。实验表明,仅考虑南极信号泄露时,拟合边界至少为南极海岸线外扩300km;当考虑外扩范围内的海洋信号对南极质量变化及其空间分布的影响时,最佳拟合边界为海岸线外扩100km。采用最佳外扩边界线利用拟合法估算的CSRRL05时变重力场模型的南极质量变化速率为-178.61Gt/a,其质量变化空间分布与Mascon模型一致性较好。
In this paper,we use GRACE CSR Mascom data to analyze the effect on the leakage error correctionof boundary expansion and ocean signal within the boundary by means of fitting method in the Antarctic.Simulated results show that the minimum extending range is 300 km,when only considering the leakage-out error from the Antarctic.The ocean signal in the expansion boundary has a significant influence on the Antarctic mass change,particularly for spatial distribution of the mass change along the coastline region.When considering the leakage-out error and the influence of the adjacent ocean signal,the experiment suggests that the optimized extending range is 100 km.Then,the optimized extending range is applied to the fitting method,and the trend of the Antarctic mass change derived from the GRACE CSR RL05 data is-178.61 Gt/a,which is in good agreement with the Mascom results.
作者
邱春洪
范东明
谷延超
赵鸿彬
宿春鹏
尹恒
QIU Chunhong;FAN Dongming;GU Yanchao;ZHAO Hongbin;SU Chunpeng;YIN Heng(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,West High-Tec Zone,Chengdu 611756,China;China Railway Eryuan Engineering Group Co Ltd,3 Tongjin Road,Chengdu 610031,China;State-Province Joint Engineering Laboratory of Spatial Information Technology of High-Speed Rail Safety,West High-Tec Zone,Chengdu 611756,China;School of Civil Engineering and Architecture,Southwest Petroleum University,8 Xindu Road,Chengdu 610500,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2019年第11期1127-1131,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41574018)~~
