大气负荷对兰新铁路线区域地壳形变及重力变化的影响

The Influence of Atmospheric Load on the Crust and Gravity Changes in the Lanxin Railway Area

使用兰新铁路线周边区域2012~2017年的全球大气模型和区域气象站气压数据,根据大气负荷理论,采用移去-恢复法计算该区域在6 a间大气负荷对地壳形变和重力变化的影响。结果显示,大气负荷对兰新线区域的垂直形变影响为1 cm左右,对水平形变影响小于2 mm,对垂线偏差影响约为6 ms,对地面重力影响大致为6μGal;大气负荷对地壳形变和地面重力的影响总体呈现出年周期性和季节性变化。

Using the removal-recovery method,the global atmospheric model and the pressure data of regional weather stations in the area around the Lanxin railway from 2012 to 2017,we calculate the influence of atmospheric load on the crustal deformation and gravity change in the 6 year period according to the atmospheric load theory.The results show that atmospheric load has an impact of about 1 cm on the vertical deformation of the Lanxin railway area,and less than 2 mm on the horizontal deformation.The impact on the vertical deviation is roughly 6 ms;on the ground gravity,the impact is roughly 6μGal.The influence of atmospheric load on crustal deformation and ground gravity shows annual periodic and seasonal changes.