Research on internal gravity waves in the Martian atmosphere based on Tianwen-1 and Mars Global Surveyor occultation data  

作　　者：Luo Xiao CunYing Xiao Xiong Hu ZeWei Wang XiaoQi Wu 

机构地区：[1]Institute for Frontiers in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China [2]School of Physics and Astronomy,Beijing Normal University,Beijing 100875,China [3]State Key Laboratory of Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100045,China [4]Key Laboratory of Science and Technology on Environmental Space Situation Awareness,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Earth and Planetary Physics》2024年第6期890-898,共9页地球与行星物理（英文版）

基　　金：National Natural Science Foundation of China(Grant Nos.42174192,12241101,and 91952111).

摘　　要：Internal gravity waves(IGWs)are critical in driving Martian atmospheric motion and phenomena.This study investigates Martian IGWs by using high-resolution data from China’s Tianwen-1 mission and the National Aeronautics and Space Administration’s Mars Global Surveyor(MGS)by the radio occultation(RO)technique.Key IGW parameters,such as vertical and horizontal wavelengths,intrinsic frequency,and energy density,are extracted based on vertical temperature profiles from the Martian surface to~50 km altitude.Data reveal that the Martian IGWs are predominantly small-scale waves,with vertical wavelengths between 6 and 13 km and horizontal wavelengths extending to thousands of kilometers.These waves propagate almost vertically and exhibit low intrinsic frequencies close to the inertial frequency,with the characteristic of low-frequency inertial IGWs.Tianwen-1 data indicate stronger IGW activity,higher energy density,and less dissipation than MGS data in the northern hemisphere.Moreover,MGS data in the southern hemisphere show higher buoyancy frequencies and lower vertical wavelengths,suggesting more stable atmospheric conditions conducive to IGW propagation.These extracted IGW characteristics can enhance our understanding of the atmospheric dynamics on Mars and contribute valuable information for parameterization in global circulation models.

关 键 词：internal gravity waves MARS Tianwen-1 Mars Global Surveyor radio occultation 

分 类 号：V476.4[航空宇航科学与技术—飞行器设计] P185.3[天文地球—天文学]