| 拟合法改正南极泄露误差最佳外扩边界的确定及其应用 |
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| 引用本文： | 邱春洪,范东明,谷延超,赵鸿彬,宿春鹏,尹恒.拟合法改正南极泄露误差最佳外扩边界的确定及其应用[J].大地测量与地球动力学,2019,39(11):1127-1131. |
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| 作者姓名： | 邱春洪 范东明 谷延超 赵鸿彬 宿春鹏 尹恒 |
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| 作者单位： | 西南交通大学地球科学与环境工程学院,成都市高新区西部园区,611756;中铁二院工程集团有限责任公司,成都市通锦路3号,610031;西南交通大学地球科学与环境工程学院,成都市高新区西部园区,611756;高速铁路运营安全空间信息技术国家地方联合工程实验室,成都市高新区西部园区,611756;西南石油大学土木工程与建筑学院,成都市新都大道8号,610500;西南交通大学地球科学与环境工程学院,成都市高新区西部园区,611756 |
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| 摘 要： | 以GRACE CSR 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300 km；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100 km。采用最佳外扩边界线利用拟合法估算的CSR RL05时变重力场模型的南极质量变化速率为-178.61 Gt/a，其质量变化空间分布与Mascon模型一致性较好。
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| 关 键 词： | GRACE 南极 泄漏误差 拟合法 质量平衡 |
Estimation and Application of Optimized Extending Range to Reduce Leakage Error in the Antarctic by Means of Fitting Method |
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| QIU Chunhong,FAN Dongming,GU Yanchao,ZHAO Hongbin,SU Chunpeng,YIN Heng.Estimation and Application of Optimized Extending Range to Reduce Leakage Error in the Antarctic by Means of Fitting Method[J].Journal of Geodesy and Geodynamics,2019,39(11):1127-1131. |
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| Authors: | QIU Chunhong FAN Dongming GU Yanchao ZHAO Hongbin SU Chunpeng YIN Heng |
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| Abstract: | 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. |
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| Keywords: | GRACE Antarctic leakage error fitting method mass balance |
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