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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >MAVEN ROSE Observations of the Response of the Martian Ionosphere to Dust Storms
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MAVEN ROSE Observations of the Response of the Martian Ionosphere to Dust Storms

机译：MAVEN玫瑰的观察的反应火星电离层沙尘暴

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摘要

During a Martian dust storm, the lower atmosphere is heated locally. Due to dynamical effects, the upper atmosphere and ionosphere can be lifted upward on a global scale by approximately 10 km. The connections between lower atmospheric dust events and associated ionospheric responses are poorly understood due to limited observations. Here, we present MAVEN Radio Occultation Science Experiment (ROSE) observations of ionospheric peak altitude during dust events in 2018 and 2016. In June 2018, a planet-encircling dust event arose from the Acidalia storm track in the northern hemisphere. Ionospheric peak altitudes at around 20?S were normal in ROSE egress observations on 19 June and 22 June and then 10–15 km higher on 26 June and thereafter. Ionospheric peak altitudes at around 50?N were also elevated in ROSE ingress observations, which began on 17 June. This suggests that the ionospheric peak altitude was affected by the dust event in the northern hemisphere before the southern hemisphere. We also observe evidence that smaller dust storms can trigger ionospheric responses: In July–October 2016, ionospheric peak altitudes at solar zenith angles of 54–70? and latitudes of 50–80?S were 20 km higher than expected. These observations were acquired during a modest “A storm” during a year without a global dust storm.
机译：在火星尘暴,低层大气在本地加热。高层大气和电离层可以解除在全球范围内上升了大约10公里。降低大气尘埃之间的连接事件和电离层响应有关知之甚少,由于有限的观测。下面,我们介绍MAVEN无线电掩星科学实验(玫瑰)电离层观测在2018年和峰值高度在尘埃事件2016. 事件起因于Acidalia风暴跟踪的北半球。在大约20吗?观察6月19日和6月22日6月26日和之后10 - 15公里。电离层峰值高度约50 ?玫瑰进入观察也升高,6月17日开始的。电离层峰值高度的影响沙尘事件之前在北半球南半球。较小的沙尘暴可以触发电离层回复:2016年July-October,电离层峰值海拔在太阳能天顶角度54 - 70 ?纬度的50 - 80 ?预期。适度的“暴风雨”没有一个全球一年沙尘暴。

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