祁连山南麓区域的大气负荷动力学效应研究  

Study on the dynamical effects of atmospheric load on the southern foot of Qilian Mountains

作　　者：安旭伟 杨国林 孙学先 刘涛 张波 AN Xuwei;YANG Guolin;SUN Xuexian;LIU Tao;ZHANG Bo(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring,Lanzhou 730070,China;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070,China)

机构地区：[1]兰州交通大学测绘与地理信息学院,兰州730070 [2]地理国情监测技术应用国家地方联合工程研究中心,兰州730070 [3]甘肃省地理国情监测工程实验室,兰州730070

出　　处：《导航定位学报》2021年第2期90-95,共6页Journal of Navigation and Positioning

基　　金：国家重点研发计划课题项目(2016YFC0803106);国家自然科学基金项目(41764001,41761088);兰州交通大学优秀平台支持项目(201806);兰州交通大学天佑创新团队项目(TY202001)。

摘　　要：地壳形变的大气负荷效应在沿海区域已得到了广泛研究和应用,但是在内陆地区,动力学效应研究甚少。基于地面气象观测数据和全球气压模型数据,给出了一种适合于内陆地区的大气负荷动力学效应的计算方法。以中国祁连山南麓地区为例,研究了地壳形变和地面重力变化。研究结果表明:对于祁连山南麓地区,大气负荷对测站位移径向分量的影响约为8.4 mm,而水平位移不足1.0 mm;对测站重力的影响约为6.4×10^(-8) m/s^(2)。大气负荷的动力学效应具有明显的周期性和季节性,这种变化规律与周边地区表现出较高的一致性。At present,domestic researches on changes in surface characteristics of atmospheric loading effects was mainly concentrated in the southeastern coastal areas,while the study’s researches in northwest plateau were poor.So this paper presented an improvement method:the global atmospheric model and regional atmospheric pressure data were used to improve the accuracy of local atmospheric load,calculated the impact of atmospheric pressure loading on crustal deformation and gravity changes in the southern piedmont of Qilian Mountains.Statistical analysis results showed that:the impact of atmospheric loading is mainly reflected in vertical deformation and ground gravity changes,and the impact of maximum annual magnitude is 8.4 mm and 6.4×10^(-8) m/s^(2),while horizontal deformation is less than 1.0 mm.The atmospheric loading has obvious annual periodicity and seasonality,at the same time,this change law is consistent with the surrounding areas.However this method needs to consider calculation of the tidal harmonic constant if the method is applied to waterrich areas.

关 键 词：球谐分析 移去恢复 负荷格林函数 大气导纳 

分 类 号：P228[天文地球—大地测量学与测量工程]