Climatology of global gravity wave activity and dissipation revealed by SABER/TIMED temperature observations

作     者：SHUAI Jing ZHANG ShaoDong HUANG ChunMing YI Fan HUANG KaiMing GAN Quan GONG Yun 

作者机构：Electronic Information School Wuhan University Key Laboratory of Geospace Environment and GeodesyMinistry of Education State Observatory for Atmospheric Remote Sensing 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2014年第57卷第5期

页      面：998-1009页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 07[理学] 070601[理学-气象学] 08[工学] 0706[理学-大气科学] 

基　　金：supported by the National Basic Research Program of China(Grant No.2012CB825605) the National Natural Science Foundation of China(Grants Nos.41174126 40825013 41221003 and 40974082) the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20100141110020) the Ocean Public Welfare Scientific Research Project of the State Oceanic Administration of the People’s Republic of China(Grant No.201005017) a China Meteorological Administration(Grant No.GYHY201106011) the Open Programs of State Key Laboratory of Space Weather the Fundamental Research Funds for the Central Universities 

主　　题：gravity wave dissipation climatology middle and high atmosphere TIMED/SABER 

摘      要：Gravity wave activity and dissipation in the height range from the low stratosphere to the low thermosphere(25–115 km)covering latitudes between 50°S and 50°N are statistically studied by using 9-year(January 22,2002–December 31,2010)SABER/TIMED temperature *** propose a method to extract realistic gravity wave fluctuations from the temperature profiles and treat square temperature fluctuations as GW ***,the gravity wave activity generally increases with *** the equator(0°–10°),the gravity wave activity shows a quasi-biennial variation in the stratosphere(below 40 km)while from 20°to 30°,it exhibits an annual variation below 40 km;in low latitudes(0°–30°)between the upper stratosphere and the low thermosphere(40–115 km),the gravity wave activity shows a semi-annual *** middle latitudes(40°–50°),the gravity wave activity has a clear annual variation below 85 *** addition,we observe a four-monthly variation with peaks occurring usually in April,August,December in the northern hemisphere and in February,June,October in the southern hemisphere,respectively,above 85 km in middle latitudes,which has been seldom reported in gravity wave *** order to study the dissipation of gravity wave propagation,we calculate the gravity wave dissipation ratio,which is defined as the ratio of the gravity wave growth scale height to the atmosphere density scale *** height variation of the dissipation ratio indicates that strong gravity wave dissipation mainly concentrates in the three height regions:the stratosphere(30–60 km),the mesopause(around 85 km)and the low thermosphere(above 100 km).Besides,gravity wave energy enhancement can be also observed in the background atmosphere.