平流层爆发性增温期间赤道电集流中太阴潮汐的经度变化统计学研究  

Statistical study of the longitudinal variation of the lunar tide in the equatorial electrojet during the sudden stratospheric warming

作　　者：郑志超 王慧[1] 张科灯 何杨帆 高洁[1] 孙璐媛 仲云芳 ZHENG ZhiChao;WANG Hui;ZHANG KeDeng;HE YangFan;GAO Jie;SUN LuYuan;ZHONG YunFang(Department of Space Physics,School of Electronic Information,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学电信学院空间物理系,武汉430072

出　　处：《地球物理学报》2021年第11期3882-3892,共11页Chinese Journal of Geophysics

基　　金：国家自然科学基金(41974182);中央高校基本科研业务费专项资金(2042021kf0208)资助.

摘　　要：本文利用地磁台站和卫星磁场数据,对平流层爆发性增温(Sudden Stratospheric Warming,SSW)期间赤道电集流(Equatorial Electrojet,EEJ)中太阴半日潮汐的经度变化进行了统计学分析.结果显示,SSW期间秘鲁和印度扇区的EEJ中太阴半日潮汐明显增强,且存在显著的经度差异.秘鲁扇区的EEJ中太阴半日潮汐达到峰值的时间要早于印度扇区,进一步分析发现峰值时间的经度差异与太阳活动和准两年振荡相位有关.此外,SSW期间秘鲁扇区EEJ的太阴半日潮汐峰值强度比印度扇区高.对比不同经度带背景磁场的强度与太阴半日潮汐的峰值幅度的关系,可以看出SSW期间EEJ太阴半日潮汐峰值幅度的经度差异与背景磁场强度有关,但也存在其他物理过程的影响.In the present study,based on the magnetic field measurements from ground-based magnetometers and satellite,we have performed a statistical analysis of the longitudinal variation of the lunar semi-diurnal tide(M2)in the equatorial electrojet(EEJ)during the sudden stratospheric warming(SSW)period.It shows that the M2 of EEJ at Peruvian and Indian sectors are significantly enhanced during SSW period,but showing an obvious longitudinal difference.In the Peruvian sector,the peak M2 occurs earlier than that of Indian sector.Further analysis shows that the longitudinal difference of the occurrence time of peak M2 is related to both the solar activity and Quasi Biennial Oscillation phase.In addition,the intensity of the peak M2 of EEJ in the Peruvian sector is higher than that in the Indian sector during SSW period.This longitudinal difference of the peak amplitude of M2 is related to the intensity of the background magnetic field,and other physical processes.

关 键 词：赤道电集流 太阴潮汐 平流层爆发性增温 经度变化 

分 类 号：P352[天文地球—空间物理学]