大气环境变化对地壳形变观测的影响研究*

(1.中国地震局地震研究所(地震大地测量重点实验室),湖北 武汉 430071; 2.湖北省地震局,湖北 武汉 430071; 3.华中科技大学 网络与计算中心,湖北 武汉 430074)

大气环境变化; 地壳形变; 潮汐异常; 小波分析; 响应频段

Research on Influence of Atmospheric Environmental Change on Crustal Deformation Observation
SUN Ling-li1,2,LI Ming1,2,LONG Tao3

(1. Key Laboratory of Geodesy,Institute of Seismology,CEA,Wuhan 430071,Hubei,China)(2. Earthquake Administration of Hubei Province,Wuhan 430071,Hubei,China)(3. Network and Computing Center,Huazhong University of Science and Technology,Wuhan 430074,Hubei,C

atmospheric environmental change; crustal deformation; tidal anomalies; wavelet analysis; response spectrum

备注

采用2003~2013年湖北省数字化地壳形变潮汐分钟值资料,利用小波分析方法,对地壳形变观测数据对大气环境变化各影响因素(大气压强、温度、降雨、台风及日食活动)的响应规律进行了研究。结果 表明:近地表大气环境因素对形变观测数据的影响频段各不相同。大气压强和温度对形变观测的影响频段主要集中在较低频段(64~128 min); 降雨的影响主要集中在0~全日波(0~32 min)范围内,且存在高频、非潮汐成份。而台风在形变观测较高频段上有明显影响,频段分布在1~4 s和2~4 min之间。黄梅台应变观测对2009年日食事件在128~256 min低频段上有响应。

Tidal minute value data of digital crustal deformation in Hubei province from 2003 to 2013 are applied to analyze the response rule of observational crustal deformation on influence factor of atmospheric environmental change(atmospheric pressure,rainfall,typhoon and solar activity)by wavelet transform analyze method. The research results show that the influence of near surface atmospheric environmental factors on deformation observation data has the different characteristic in different frequency. The influence frequency of atmospheric pressure and temperature on deformation observation data mainly concentrates in low frequency range(64~128 min). The tidal data respond to rainfall mainly concentrates in frequency spectrum from 0 to diurnal wave(0~32 min)along with high frequency noise and non-tidal components. The influence of typhoon on tidal data is significant in high frequency spectrum of 1~4 s and 2~4 min. The strain observation data responds to the eclipse in low frequency(128~256 min)at Huangmei station in 2009.