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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Electric properties of dust devils
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Electric properties of dust devils

机译：尘埃魔鬼的电气特性

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Dust devils are one of the most effective phenomena able to inject dust grains into the atmosphere. On Mars, they play an important role to maintain the haze and can significantly affect the global dust loading, especially outside the dust storm season. Despite dust devils having been studied for a century and a half, many open questions regarding their physics still exist. In particular, the nature of the dust lifting mechanisms inside the vortices, the development of the induced electric field and the exact contribution to the global atmospheric dust budget are still debated topics. In this paper, we analyze the dust devil activity observed in the Moroccan Sahara desert during a 2014 field campaign. We have acquired the most comprehensive field data set presently available for the dust devils: including meteorological, atmospheric electric field and lifted dust concentration measurements. We focus our attention on the electric field induced by vortices, using this as the principal detection parameter. We present, for the first time, the statistical distribution of dust devil electric field and its relationships with the pressure drop, the horizontal and vertical vortex velocity and the total dust mass lifted. We also compare the pressure drop distribution of our sample with the ones observed on the martian surface showing the similarity of the dust devils samples and the usefulness of this study for the next martian surface missions. (C) 2018 Published by Elsevier B.V.
机译：尘埃魔鬼是能够将尘埃颗粒注入大气中的最有效现象之一。在火星上，他们发挥着保持阴霾的重要作用，可以显着影响全球尘土荷载，特别是在防尘季节之外。尽管已经研究了一个世纪和半个世纪的尘埃魔鬼，但许多关于他们物理学的开放问题仍然存在。特别是，涡流内部的灰尘提升机构的性质，诱导电场的发展和对全球大气灰尘预算的确切贡献仍然是讨论的主题。在本文中，我们在2014年野外活动期间分析了摩洛哥撒哈拉沙漠中观察到的尘埃魔鬼活动。我们已经获得了目前可用于灰尘魔鬼的最全面的现场数据：包括气象，大气电场和提升的粉尘浓度测量。我们将注意力集中在涡流引起的电场上，使用这是主要的检测参数。我们首次出示灰尘魔鬼电场的统计分布及其与压降，水平和垂直涡流速度以及升降的总灰尘质量的关系。我们还将样品的压力降低了与在火星表面上观察到的样品的压力下降，显示尘埃魔鬼样品的相似性和本研究对下一个火星表面任务的有用性。 （c）2018由elestvier b.v出版。

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