| 大气负荷对区域地壳形变和重力变化的影响分析 |
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| 引用本文： | 王伟,章传银,杨强,邹正波,朱锦杰,康胜军.大气负荷对区域地壳形变和重力变化的影响分析[J].武汉大学学报(信息科学版),2018,43(9):1302-1308. |
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| 作者姓名： | 王伟 章传银 杨强 邹正波 朱锦杰 康胜军 |
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| 作者单位： | 1.中国测绘科学研究院, 北京, 100830 |
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| 基金项目： | 国家自然科学基金41374081国家自然科学基金41674024国家重点研发计划项目2016YFB0501702 |
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| 摘 要： | 在高精度大地测量观测数据处理和相关地球物理解释中，大气负荷由于影响较大，需要考虑。利用全球大气模型和区域气象站气压数据，采用移去恢复方法和球谐分析方法，计算了三峡地区大气负荷对地壳形变和重力变化的影响。提供了一种利用局部气压数据改善该区域大气负荷影响变化计算效果的合理算法，提高局部气压数据和全球模型数据利用的合理性和准确性。研究发现，大气负荷对垂直形变的影响在空间分布上中长波占优，在三峡地区的年变化幅度大于20 mm，对地面重力变化影响的年变化幅度一般不超过10 μGal，对水平形变影响较小。
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| 关 键 词： | 大气负荷 移去恢复 地壳形变 重力变化 球谐系数 |
| 收稿时间： | 2017-09-07 |
Impact of Atmospheric Pressure Loading on Regional Crustal Deformation and Gravity Change |
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| Affiliation: | 1.Chinese Academy of Surveying & Mapping, Beijing 100830, China2.Institute of Earthquake, China Earthquake Administration, Wuhan 430071, China3.Shandong Provincial Geo-mineral Engineering Exploration Institute, Jinan 250014, China4.The First Geodetic Brigade, National Administration of Surveying, Mapping and Geoinformation, Xi'an 710054, China |
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| Abstract: | Atmospheric pressure loading needs to be considered due to the great impact on the proce-ssing of high precision geodetic observations data and related geophysical interpretation. In this study, we use the global atmospheric model and regional atmospheric pressure data on weather stations, and calculate the impact of atmospheric pressure loading on crustal deformation and gravity change in the Three Gorges region of China on the basis of the remove-restore method and spherical harmonic analysis method. The proposed method can effectively solve global-scale model data being applied to the region, to improve the utilization of local data and global pressure model. This study finds that the impact of atmospheric pressure loading on the vertical deformation in the spatial distribution is mainly on the long wave. The amplitude of annual variation is greater than 20 mm in the Three Gorges region. The magnitude of gravity change on the ground is generally not more than 10 μGal. However, the impact on the horizontal deformation is very little. The results of this study have important reference value for separating the atmospheric effects in the processing of GNSS data and gravity data, and for analyzing. |
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