气温、降雨对巴里坤水平摆观测的影响分析

摘要

选取2011～2016年巴里坤水平摆观测资料及降雨、气温数据,采用形态法、年变曲线、相关和回归分析方法,研究了气温、降雨对巴里坤水平摆的干扰特征及机理.结果表明:(1)持续降雨可造成巴里坤水平摆月频段和日频段曲线形态的变化,表现为NS分量加速南倾,EW分量西倾,NS分量较EW 分量更易受降雨干扰的影响;(2)通过一般多项式曲线拟合去趋势后,气温和水平摆两分量观测值的相关系数明显变大.与NS分量相关性的显著提高说明巴里坤水平摆NS分量的趋势性异常并非由气温引起;与EW分量相关性的提高说明EW分量的整体西倾与气温无关. (3)通过曲线回归拟合可知,气温是巴里坤水平摆年变频段信息的重要影响因素,EW分量与气温的回归拟合结果优于NS分量.%Based on the horizontal pendulum data of Barkol seismic station from 2011 to 2016, with the methods of morphology , annual variation curve and correlation and regression analysis ,explore the characteristics and mechanism of the influence of air temperature and rainfall on the Barkol hori -zontal pendulum.The results show that :(1) The continuous rainfall can cause the daily and monthly frequency variation curve of the horizontal pendulum at Barkol seismic station , NS component tilted southward rapidly , and EW component tilted westward , the NS component are more susceptible to the rainfall disturbance.(2)After remove trend, correlation coefficient between temperature and ob-served data obviously increases , the feature is notable to the NS component ,which shows that the trend change of the NS component is not related to the change of air temperature.And the improve-ment of the correlation with the EW component indicates that the overall west dump of the EW com-ponent is independent of the temperature.(3) The results of curve regression fitting show that the temperature is the important factor of the frequency information of the Barkol horizontal pendulum , and the fitting result of EW component and air temperature is better than NS component .