基于TIMED-TIDI风场观测的周日迁移潮汐分析  

Investigation on the migrating diurnal tide based on TIMED-TIDI data

作　　者：王真贵 万卫星[1] 任志鹏[1] 熊建刚[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京空间环境国家野外科学观测研究站,北京100029 [2]中国科学院大学,北京100049

出　　处：《地球物理学进展》2013年第5期2213-2220,共8页Progress in Geophysics

基　　金：国家自然科学基金(40974090);国家重点基础研究计划(2011CB811405)联合资助

摘　　要：中高层大气中,周日迁移潮汐(DW1)是最重要的潮汐分量.基于TIMED-TIDI观测数据,我们提取出纬向风场和经向风场的DW1潮汐分量,并利用经典潮汐模分析方法对DW1进行了分析.结果显示,在中层和低热层(MLT)区域,DW1的对称波模比反对称波模重要,其主要成分是传播波模(1,1)和相对较小的耗散波模(1,-2).分析表明,这些波模具有显著的半年变化和年变化.利用经典潮汐理论对DW1观测值的拟合结果表明,用较少阶的潮汐波模就能很好描述观测数据,从而表明经典潮汐理论在中高层大气的观测分析和模式化研究中具有重要作用.The migrating diurnal tide DW1 is the most important tidal component of the atmosphere. Thus, study on DW1 can enrich our understanding of mesospheric and lower thermospheric sciences. Based on the TIDI measurements, we extract the DW1 components for both the zonal wind and the meridional wind and analyze the DW1 variations with latitude and time using the classical tidal modes. The results show that the symmetric wave modes of DW1 are more important than the anti-symmetric wave modes and the main components of DW1 are the propagation mode （1, 1） and a relatively weak evanescent mode （1, - 2）. The modes have significant semiannual and annual variations. Based on the tidal mode analysis, we can predict the DW1 meridional wind from the zonal wind measurement, or predict the DW1 zonal wind from the meridional wind, and the derived results are very consistent with the ts. The fitting results of DW1 show that we may use only a few lower class wave modes to characterize the measurement, which is very useful for the atmospheric data analysis and modeling work.

关 键 词：周日迁移潮 TIMED-TIDI 经典潮汐波模 中层和低热层 

分 类 号：P352[天文地球—空间物理学]