Quasi-6-day waves in the mesosphere and lower thermosphere region and their possible coupling with the QBO and solar 27-day rotation  

作　　者：JianYuan Wang Wen Yi TingDi Chen XiangHui Xue 

机构地区：[1]Chinese Academy of Sciences Key Laboratory of Geospace Environment,Department of Geophysics and Planetary Sciences,University of Science and Technology of China,Hefei 230026,China [2]Mengcheng National Geophysical Observatory,School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China [3]Chinese Academy of Sciences Center for Excellence in Comparative Planetology,Hefei 230026,China [4]Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China

出　　处：《Earth and Planetary Physics》2020年第3期285-295,共11页地球与行星物理（英文版）

基　　金：the National Natural Science Foundation of China(41774158,41974174,41674150,41831071 and 41904135);the Open Research Project of Large Research Infrastructures of CAS—“Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project”.

摘　　要：By using atmospheric wind data in the mesopause and lower thermosphere(MLT)region,features of seasonal variations in the quasi-6-day wave(6DW)at different latitudes are analyzed,and modulation of the 6DW by the diurnal tide and solar 27-day period is discussed.The data used in the analysis are extracted from a wind dataset collected by a meteor radar chain from December 2008 to November 2017.The meteor radar chain includes four stations,in Mohe,Beijing,Wuhan,and Sanya.Features of seasonal variations in the 6DW indicate that in summer the 6DW is usually strongest during July and August,followed by stronger variations in January and April.At certain altitudes over Wuhan and Sanya,the 6DW is slightly different in different years and altitudes.In our analysis of seasonal variations in the 6DW,we find that it is generally affected by annual oscillations and semiannual oscillations.The annual oscillations of the 6DW in the mid-low latitudes are modulated by the quasibiennial oscillation in the diurnal tide,resulting in seasonal features that are different from those at other latitudes.In addition,the 6DW amplitude at mid-high latitudes has a significant 27-day solar rotation variation,which was prominent in 2016.

关 键 词：quasi-6-day wave meteor radar winds seasonal variations quasibiennial oscillation TIDES 27-day variation 

分 类 号：P412.25[天文地球—大气科学及气象学]