Is Solar Wind electron precipitation a source of neutral heating in the nightside Martian upper atmosphere?

作     者：LongKang Dai Jun Cui DanDan Niu Hao Gu YuTian Cao XiaoShu Wu HaiRong Lai LongKang Dai;Jun Cui;DanDan Niu;Hao Gu;YuTian Cao;XiaoShu Wu;HaiRong Lai

作者机构：Planetary Environmental and Astrobiological Research Laboratory(PEARL)School of Atmospheric SciencesSun Yat-sen UniversityZhuhai Guangdong 519082China Key Laboratory of Lunar and Deep Space ExplorationNational Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Center for Excellence in Comparative PlanetologyChinese Academy of SciencesHefei 230031China Institute of Space Science and Applied TechnologyHarbin Institute of TechnologyShenzhen Guangdong 518055China 

出 版 物：《Earth and Planetary Physics》 (地球与行星物理（英文版）)

年 卷 期：2021年第5卷第1期

页      面：1-10页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：the B-type Strategic Priority Program No.XDB41000000 funded by the Chinese Academy of Sciences the pre-research project on Civil Aerospace Technologies No.D020105 funded by China’s National Space Administration the National Natural Science Foundation of China through grants 41525015,41774186,41904154,and 42030201 

主　　题：Mars Solar Wind upper atmosphere MAVEN 

摘      要：Solar Wind(SW)electron precipitation is able to deposit a substantial amount of energy in the nightside Martian upper atmosphere,potentially exerting an influence on its thermal *** study serves as the first investigation of such an issue,with the aid of the simultaneous measurements of both neutral density and energetic electron intensity made on board the recent Mars Atmosphere and Volatile Evolution(MAVEN)*** report that,from a statistical point of view,the existing measurements do not support a scenario of noticeable neutral heating via SW electron ***,during 3%−4%of the MAVEN orbits for which data are available,strong correlation between nightside temperature and electron intensity is observed,manifested as collocated enhancements in both parameters,as compared to the surrounding *** addition,our analysis also indicates that neutral heating via SW electron precipitation tends to be more effective at altitudes below 160 km for integrated electron intensities above 0.01 ergs·cm^−2·s^−1 over the energy range of 3−450 *** results reported here highlight the necessity of incorporating SW electron precipitation as a heat source in the nightside Martian upper atmosphere under extreme circumstances such as during interplanetary coronal mass ejections.