| 基于移去-恢复法的区域大气负荷影响精化——以滇西地区为例 |
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| 引用本文： | 申龙杰,章传银,徐鹏飞,杨康.基于移去-恢复法的区域大气负荷影响精化——以滇西地区为例[J].大地测量与地球动力学,2022,42(6):631-636. |
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| 作者姓名： | 申龙杰 章传银 徐鹏飞 杨康 |
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| 作者单位： | 兰州交通大学测绘与地理信息学院,兰州市安宁西路 88 号,730070;中国测绘科学研究院,北京市莲花池西路 28 号,100830;甘肃省地理国情监测工程实验室,兰州市安宁西路 88 号,730070;地理国情监测技术应用国家地方联合工程研究中心,兰州市安宁西路 88 号,730070,中国测绘科学研究院,北京市莲花池西路 28 号,100830 |
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| 基金项目： | 兰州交通大学优秀平台项目;中国测绘科学研究院基本科研业务费;自然资源部海洋环境探测技术与应用重点实验室开放基金 |
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| 摘 要： | 传统的大气负荷改正根据全球大气压模型计算获取，但全球大气压模型中、长波信号占优，缺乏突显区域特征信息的短波信号，而在研究高精度的区域大气负荷影响时，空间信息中的短波信号不可忽视。为此，根据地球重力场理论，引入移去-恢复思想，结合ECMWF提供的全球大气压变化数据和区域高分辨率大气压变化数据（CLDAS-V2.0），基于负荷球谐系数和区域负荷格林函数方法得到大气压变化对滇西地区的负荷影响。结果表明，得到的大气负荷形变场在空间和时间分变率上均有一定提高。利用移去-恢复法计算区域大气压负荷影响，可为固体地球形变和CORS站时序分析提供参考。
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| 关 键 词： | 大气负荷 移去-恢复法 负荷球谐系数 时变重力场 负荷格林函数 |
Refinement of Regional Atmospheric Load Effects Based on Removal-Recovery Method:A Case Study of Western Yunnan |
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| SHEN Longjie,ZHANG Chuanyin,XU Pengfei,YANG Kang.Refinement of Regional Atmospheric Load Effects Based on Removal-Recovery Method:A Case Study of Western Yunnan[J].Journal of Geodesy and Geodynamics,2022,42(6):631-636. |
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| Authors: | SHEN Longjie ZHANG Chuanyin XU Pengfei YANG Kang |
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| Abstract: | We calculate the traditional atmospheric load correction according to the global atmospheric pressure model, but the medium-wave and long-wave signal is dominant in the global atmospheric pressure model, and the short-wave signal, which highlights the regional characteristic information, is lacking. The short-wave signal in the spatial information cannot be ignored when studying the influence of high precision regional atmospheric load. Based on the theory of the earth gravity field, we introduce the removal-recovery method, and combine the global atmospheric pressure data provided by ECMWF and the regional high precision atmospheric pressure data CLDAS-V2.0. Based on the load spherical harmonic coefficient and the regional load Green’s function method, we obtain the load effect of atmospheric pressure change in western Yunnan. The results show improvement in both the spatial and temporal resolution of the atmospheric load deformation field. The influence of regional atmospheric pressure load calculated by removal-recovery method can provide reference for solid earth deformation and CORS station time series analysis. |
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| Keywords: | atmospheric load removal-recovery method load spherical harmonic coefficient time-varying gravity field load Green’s function |
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