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Geophysical research letters, 2019-06, Vol.46 (11), p.6101-6108
2019

Details

Autor(en) / Beteiligte
Titel
The Onset and Growth of the 2018 Martian Global Dust Storm
Ist Teil von
  • Geophysical research letters, 2019-06, Vol.46 (11), p.6101-6108
Ort / Verlag
Washington: Blackwell Publishing Ltd
Erscheinungsjahr
2019
Link zum Volltext
Quelle
Wiley Online Library Journals Frontfile Complete
Beschreibungen/Notizen
  • We analyze the onset and initial expansion of the 2018 Martian Global Dust Storm (GDS 2018) using ground‐based images in the visual range. This is the first case of a confirmed GDS initiating in the Northern Hemisphere. A dusty area extending about 1.4×105 km2 and centered at latitude +31.7°±1.8° and west longitude 18°±5°W in Acidalia Planitia was captured on 30 and 31 May 2018 (Ls = 184.9°). From 1 to 8 June, daily image series showed the storm expanding southward along the Acidalia corridor with velocities of 5 m/s and simultaneously progressing eastward and westward with horizontal velocities ranging from 5 to 40 m/s. By 8 June the dust reached latitude ‐55° and later penetrated in the South polar region, whereas in the North the dust progression stopped at latitude approximately +46°. We compare the onset and expansion stage of this GDS with the previous confirmed storms. Key Points May‐June 2018 ground‐based images show the onset and early evolution of a Martian Global Dust Storm (GDS) The outbreak took place at location (North hemisphere) and time (solar longitude 184.9°) unusual for most GDSs The expansion involved horizontal velocities in all directions in the range 5‐40 m/s
Sprache
Englisch
Identifikatoren
ISSN: 0094-8276
eISSN: 1944-8007
DOI: 10.1029/2019GL083207
Titel-ID: cdi_crossref_primary_10_1029_2019GL083207

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