Changes in Thermospheric Neutral and Ionic Species Densities during Global (2018) and Regional (2016) Scale Martian Dust Storms

IF 2.2 4区地球科学 Q3 ENVIRONMENTAL SCIENCES

Journal of the Indian Society of Remote Sensing Pub Date : 2024-08-12 DOI:10.1007/s12524-024-01964-5

Manu Mehta, Harsh Yadav, Raghavendra Pratap Singh

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Abstract

The effects of Martian dust storms are not only limited to lower atmospheric regime, but the increased dust storm activity could also affect the vertical structure of the constituents in the thermosphere. To this end, this paper investigates the changes in the vertical mixing of neutral and ionic species densities in the thermosphere before and during a regional (2016) and a global (2018) dust storm event; using Neutral Gas and Ion Mass Spectrometer (NGIMS)/ Mars Atmosphere and Volatile Evolution (MAVEN) observations. Care has been taken to keep a restricted solar zenith angle variation (25º) to avoid the effects of changes in solar illumination on the distribution of thermospheric species densities. Contrasting differences in the vertical distribution of neutral (CO₂, CO, O, N₂, Ar, He) and ionic (CO₂⁺, O⁺, O₂⁺, N₂⁺, CO⁺, Ar⁺) atmospheric species before and during the regional and global dust storm events are noticed.

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全球（2018 年）和区域（2016 年）尺度火星尘暴期间热层中性和离子物种密度的变化

火星沙尘暴的影响不仅限于低层大气，沙尘暴活动的增加还可能影响热层中成分的垂直结构。为此，本文利用中性气体和离子质谱仪（NGIMS）/火星大气与挥发物演化（MAVEN）观测数据，研究了区域性（2016年）和全球性（2018年）沙尘暴事件发生之前和期间热大气层中中性和离子物种密度的垂直混合变化。为避免太阳光照变化对热层物种密度分布的影响，我们注意保持有限的太阳天顶角变化（25º）。注意到在区域和全球沙尘暴事件之前和期间，中性（CO2、CO、O、N2、Ar、He）和离子（CO2+、O+、O2+、N2+、CO+、Ar+）大气物种的垂直分布存在对比差异。

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来源期刊

Journal of the Indian Society of Remote Sensing ENVIRONMENTAL SCIENCES-REMOTE SENSING

CiteScore

4.80

自引率

8.00%

发文量

163

审稿时长

7 months

期刊介绍： The aims and scope of the Journal of the Indian Society of Remote Sensing are to help towards advancement, dissemination and application of the knowledge of Remote Sensing technology, which is deemed to include photo interpretation, photogrammetry, aerial photography, image processing, and other related technologies in the field of survey, planning and management of natural resources and other areas of application where the technology is considered to be appropriate, to promote interaction among all persons, bodies, institutions (private and/or state-owned) and industries interested in achieving advancement, dissemination and application of the technology, to encourage and undertake research in remote sensing and related technologies and to undertake and execute all acts which shall promote all or any of the aims and objectives of the Indian Society of Remote Sensing.