MITM: A new Mars Ionosphere-Thermosphere Model  

作　　者：ZhiPeng Ren YunBo Liu WeiXing Wan Yong Wei XinAn Yue 

机构地区：[1]Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [2]Beijing National Observatory of Space Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [3]Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China [4]College of Earth and Planetary Sciences,University of the Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Earth and Planetary Physics》2025年第2期337-345,共9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 the Chinese Academy of Sciences (Grant No. XDB4100000);the pre-research Project on Civil Aerospace Technologies No. D020105 funded by CNSA;the Strategic Priority Research Program of Chinese Academy of Sciences (Grant XDA17010404, XDA17010201)。

摘　　要：In this study, we present an innovative Mars Ionosphere-Thermosphere Model(MITM), which is a time-dependent, threedimensional(3-D) model that comprehensively represents the self-consistently coupled thermosphere and ionosphere of Mars within the altitude range of 70-300 km. The model incorporates an extensive range of parameters, including neutral number densities of CO_(2), CO,O, O_(2), N_(2), NO, N(^(2)D), N(^(4)S), Ar, and He;ion number densities of CO_(2)^(+), CO^(+), O^(+), O_(2)^(+), N_(2)^(+), NO^(+), N^(+) ions, and electrons;neutral temperature;and neutral wind fields. The MITM code employs a high-resolution grid system in a spherical geographical coordinate system, with a horizontal resolution of 5° latitude by 7.5° longitude. This altitude-resolved grid system enables accurate depiction of spatial variations in the Martian thermosphere and ionosphere. To showcase the capabilities of the MITM, we present two simulation cases: one during the equinox and another during the solstice. Both simulations reproduce key features of the Martian thermosphere and ionosphere including the characteristics of horizontal circulation, diurnal variations in chemical composition, and distribution of electron density. The MITM offers a robust framework for understanding the intricate interactions and processes that shape the Mars thermosphere and ionosphere,which are crucial for enhancing our understanding of Martian upper atmosphere and ionosphere.

关 键 词：MARS THERMOSPHERE IONOSPHERE MODELING 

分 类 号：P185.3[天文地球—天文学]