摘要
以2012年"泰利"和"苏拉"台风期间的福州台和漳州台秒采样的重力固体潮为研究对象,首先通过巴特沃斯高通滤波,提取出重力固体潮中高频的台风扰动;其次采用傅里叶变换分析福州台和漳州台重力的功率谱特征。分析结果表明:台风中心距台站越近、风速越大、气压越低,重力固体潮的扰动也越明显。"泰利"和"苏拉"台风引起的重力扰动主要频率范围为0.16～0.28 Hz,而福州台和漳州台无台风影响时的正常重力地脉动脉动频率为0.25～0.35 Hz。
The gravity tides of Fuzhou and Zhangzhou stations at seconds sampling rate are studied during the Talim and Saola periods in 2012. Firstly, the Butterworth high-pass filter is applied to extract the high frequency gravity tide related to the typhoon disturbance. Secondly, the data is transformed by FFT algorithm to analysis the frequency and amplitude of the typhoon-disturbance gravity tide. The results show good correlation between the dis- tance,the typhoon center and gravity tides. The frequencies of typhoons Talim and Saola range from 0.16 to 0.28 Hz, and the frequency range of Fuzhou and Zhangzhou gravity station is usually 0.25 to 0.35 Hz.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第A01期28-31,35,共5页
Journal of Geodesy and Geodynamics
基金
福建省地震局科研基金(SF201203)
关键词
台风
重力固体潮
滤波
傅里叶变换
地脉动
typhoon
gravity tide
filtering
Fourier transform
microseism
