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A general climatology of categorized Martian ionospheric irregularities.

Authors :
Wan, Xin
Zhong, Jiahao
Hao, Yongqiang
Xiong, Chao
Wang, Hui
Cao, Yutian
Cui, Jun
Liu, Yiwen
Li, Qiaoling
Kuai, Jiawei
Source :
SCIENCE CHINA Earth Sciences. Oct2024, Vol. 67 Issue 10, p3302-3325. 24p.
Publication Year :
2024

Abstract

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
16747313
Volume :
67
Issue :
10
Database :
Academic Search Index
Journal :
SCIENCE CHINA Earth Sciences
Publication Type :
Academic Journal
Accession number :
180036701
Full Text :
https://doi.org/10.1007/s11430-024-1388-x