A general climatology of categorized Martian ionospheric irregularities  

作　　者：Xin WAN Jiahao ZHONG Yongqiang HAO Chao XIONG Hui WANG Yutian CAO Jun CUI Yiwen LIU Qiaoling LI Jiawei KUAI 

机构地区：[1]Planetary Environmental and Astrobiological Research Laboratory(PEARL),School of Atmospheric Sciences,Sun Yat-sen University,Zhuhai 519082,China [2]Key Laboratory of Tropical Atmosphere-Ocean System,Ministry of Education,Zhuhai 519082,China [3]Department of Space Physics,College of Electronic Information,Luojia Laboratory,Wuhan University,Wuhan 430079,China [4]School of Physics and Electronic Information,Shangrao Normal University,Shangrao 334001,China [5]School of Petroleum,China University of Petroleum-Beijing at Karamay,Karamay 834000,China [6]College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Science China Earth Sciences》2024年第10期3302-3325,共24页中国科学（地球科学英文版）

基　　金：supported by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No.XDB41000000);the National Natural Science Foundation of China (Grant Nos.42374181,42374186,42104169,42104147,41804150,41804153);the Guangdong Basic and Applied Basic Research Foundation (Grant Nos.2021A1515011216,2022A1515011580,2020A1515110242);the Natural Science Foundation of Jiangsu Province (Grant No.BK20180445);the Joint Open Fund of Mengcheng National Geophysical Observatory (Grant No.MENGO-202217);the Science and Technology Project of Shangrao City (Grant No.2021F002);the Key Laboratory of Tropical Atmosphere-Ocean System (Sun Yat-sen University),Ministry of Education,the Fundamental Research Funds for the Central Universities;the Opening Funding of Chinese Academy of Sciences dedicated for the Chinese Meridian Project;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：A climatological survey of Martian ionospheric plasma density irregularities was conducted by exploring the in-situ measurements of the Mars Atmosphere and Volatile EvolutioN(MAVEN) spacecraft. The irregularities were first classified as enhancement, depletion, and oscillation. By checking the simultaneous magnetic field fluctuation, the irregularities have been classified into two types: with or without magnetic signatures. The classified irregularities exhibit diverse global occurrence patterns, as those with magnetic signatures tend to appear near the periphery of the crustal magnetic anomaly(MA), and those without magnetic signatures prefer to appear either inside of the MA or outside of the MA, depending on the type and solar zenith angle. Under most circumstances, the irregularities have a considerable occurrence rate at altitudes above the ionospheric dynamo height(above 200 km), and the magnetization state of the ions seems irrelevant to their occurrence. In addition, the irregularities do not show dependence on magnetic field geometry, except that the enhancement without magnetic signatures favors the vertical field line, implying its equivalence to the localized bulge. Other similarities and discrepancies exist in reference to previous studies. We believe this global survey complements previous research and provides crucial research clues for future efforts to clarify the nature of the Martian ionospheric irregularities.

关 键 词：MARS MAVEN IONOSPHERE Ionospheric irregularities Crustal magnetic anomaly PLASMA 

分 类 号：P185.3[天文地球—天文学]