Inertial gravity waves observed by a Doppler wind LiDAR and their possible sources  

作　　者：XiangHui Xue DongSong Sun HaiYun Xia XianKang Dou 

机构地区：[1]Chinese Academy of Sciences Key Laboratory of Geospace Environment,University of Science and Technology of China,Hefei 230026,China [2]Chinese Academy of Sciences Center for Excellence in Comparative Planetology,Hefei 230026,China [3]Anhui Mengcheng Geophysics National Observation and Research Station University of Science and Technology of China,Hefei 230026,China [4]Synergetic Innovation Center of Quantum Information&Quantum Physics,University of Science and Technology of China,Hefei 230026,China [5]Hefei National Laboratory for the Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China

出　　处：《Earth and Planetary Physics》2020年第5期461-471,共11页地球与行星物理（英文版）

基　　金：This work is supported by the B-type Strategic Priority Program of Chinese Academy of Sciences Grant No.XDB41000000;the National Natural Science Foundation of China(41774158,41974174,41831071,and 41904135);the China National Space Administration pre-research Project on Civil Aerospace Technologies No.D020105,and 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：In this paper,we use wind observations by a Doppler wind LiDAR near Delingha(37.4°N,97.4°E),Qinghai,Northwestern China to study the characteristics of inertial gravity waves in the stratosphere.We focus on 10–12 December 2013,a particularly interesting case study.Most of the time,the inertial gravity waves extracted from the LiDAR measurements were stationary with vertical wavelengths of about 9–11 km and horizontal wavelengths of about 800–1000 km.However,for parts of the observational period in this case study,a hodograph analysis indicates that different inertial gravity wave propagation features were present at lower and upper altitudes.In the middle and upper stratosphere(~30–50 km),the waves propagated downward,especially during a period of stronger winds,and to the northwest–southeast.In the lower stratosphere and upper troposphere(~10–20 km),however,waves with upward propagation and northeast–southwest orientation were dominant.By taking into account reanalysis data and satellite observations,we have confirmed the presence of different wave patterns in the lower and upper stratosphere during this part of the observational period.The combined data sets suggest that the different wave patterns at lower and upper height levels are likely to have been associated with the presence of lower and upper stratospheric jet streams.

关 键 词：gravity waves LIDAR wind observations 

分 类 号：P433[天文地球—大气科学及气象学]