The 2018 Martian Global Dust Storm over the South Polar Region studied with MEx/VMC
| Autor: | Dmitrij Titov, Jorge Hernández-Bernal, A. de Burgos-Sierra, T. del Río-Gaztelurrutia, Agustín Sánchez-Lavega, Alejandro Cardesín-Moinelo, Eleni Ravanis, Simon Wood, R. Hueso |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
Martian 010504 meteorology & atmospheric sciences FOS: Physical sciences Context (language use) 010502 geochemistry & geophysics Tracking (particle physics) Atmospheric sciences Spatial distribution 01 natural sciences Aerosol Geophysics Dust storm General Earth and Planetary Sciences Polar Geology 0105 earth and related environmental sciences Visual monitoring Astrophysics - Earth and Planetary Astrophysics |
| Popis: | We study the 2018 Martian Global DustStorm (GDS 2018) over the Southern Polar Region using images obtained by the Visual Monitoring Camera (VMC) on board Mars Express during June and July 2018. Dust penetrated into the polar cap region but never covered the cap completely, and its spatial distribution was nonhomogeneous and rapidly changing. However, we detected long but narrow aerosol curved arcs with a length of 2,000-3,000 km traversing part of the cap and crossing the terminator into the night side. Tracking discrete dust clouds allowed measurements of their motions that were towards the terminator with velocities up to 100 m/s. The images of the dust projected into the Martian limb show maximum altitudes of around 70 km but with large spatial and temporal variations. We discuss these results in the context of the predictions of a numerical model for dust storm scenario. |
| Databáze: | OpenAIRE |
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