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地球与行星物理

ISSN  2096-3955

CN  10-1502/P

Citation: ChunHua Jiang, Rong Tian, LeHui Wei, GuoBin Yang, ZhengYu Zhao, 2022: Modeling of Kilometer-Scale Ionospheric Irregularities at Mars, Earth and Planetary Physics. http://doi.org/10.26464/epp2022011

doi: 10.26464/epp2022011

Modeling of Kilometer-Scale Ionospheric Irregularities at Mars

School of Electronic Information, Wuhan University, Wuhan 430072, China

Corresponding author: ChunHua Jiang, chuajiang@whu.edu.cn

Fund Project: This work was supported by the National Natural Science Foundation of China (NSFC NO.42074184 and NO.41727804). The numerical code used for this study is not prepared for publicly accessible servers. The data used in this study are available from Zenodo: https://zenodo.org/record/5052664 (DOI: 10.5281/zenodo.5052664, the section: Numerical Simulation of Small-Scale Ionospheric Irregularities at Mars).

Recently, kilometer-scale Martian ionospheric irregularities have been measured by the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission (Fowler et al., 2020). In this study, we carried out a simulation of kilometer-scale ionospheric irregularities at Mars. A uniform zonal neutral wind was adopted in this model, and the seeding source is the cosinusoidal perturbation of the plasma density. Results show that the vertical electric field shear could be induced when the plasma density perturbation occurred. The vertical electric field shear causes the velocity shear of the plasma between the topside and bottomside ionosphere. Then, the velocity shear of the plasma between the topside and bottomside ionosphere could produce smaller-scale (kilometer-scale) ionospheric irregularities than the previous simulation (Jiang et al., 2021). The kilometer-scale variations in the plasma density and magnetic field profiles (along the altitude) are comparable with observations.

Key words: Martian ionosphere, ionospheric irregularities, numerical simulation

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Modeling of Kilometer-Scale Ionospheric Irregularities at Mars

ChunHua Jiang, Rong Tian, LeHui Wei, GuoBin Yang, ZhengYu Zhao