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Dynamics of the extremely elongated cloud on Mars Arsia Mons volcano

Hernández-Bernal, J. and Sanchez-Lavega, A. and del Río-Gaztelurrutia, Teresa and Hueso, R. and Ordonez-Etxeberria, I. and Cardesin-Moinelo, Alejandro and Ravanis, E.M. and Wood, S. and Titov, D. and Connour, K. and Schneider, N. and Tirsch, Daniela and Jaumann, Ralf and Hauber, Ernst and Gondet, B. (2020) Dynamics of the extremely elongated cloud on Mars Arsia Mons volcano. EGU General Assembly 2020, 04.-08. Mai 2020, virtual conference.

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Abstract

Starting in September 2018, a daily repeating extremely elongated cloud was observed extending from the Mars Arsia Mons volcano. We study this Arsia Mons Elongated Cloud (AMEC) using images from VMC, HRSC, and OMEGA on board Mars Express, IUVS on MAVEN, and MARCI on MRO. We study the daily cycle of this cloud, showing how the morphology and other parameters of the cloud evolved with local time. The cloud expands every morning from the western slope of the volcano, at a westward velocity of around 150m/s, and an altitude of around 30-40km over the local surface. Starting around 2.5 hours after sunrise (8.2 Local True Solar Time, LTST), the formation of the cloud resumes, and the existing cloud keeps moving westward, so it detaches from the volcano, until it evaporates in the following hours. At this time, the cloud has expanded to a length of around 1500km. Short time later, a new local cloud appears on the western slope of the volcano, starting around 9.5 LTST, and grows during the morning. This daily cycle repeated regularly for at least 90 sols in 2018, around Southern Solstice (Ls 240-300) in Martian Year (MY) 34. According with these and previous MEx/VMC observations, this elongated cloud is a seasonal phenomenon occurring around Southern Solstice every Martian Year. We study the interannual variability of this cloud, the influence of the Global Dust Storms in 2018 on the cloud’s properties (Sánchez-Lavega et al., Geophys. Res. Lett. 46, 2019), and its validity as a proxy for the global state of the Martian atmosphere (Sánchez-Lavega et al., J. Geophys. Res., 123, 3020, 2018). We discuss the physical mechanisms behind the formation of this peculiar cloud in Mars.

Item URL in elib:https://elib.dlr.de/138183/
Document Type:Conference or Workshop Item (Poster)
Title:Dynamics of the extremely elongated cloud on Mars Arsia Mons volcano
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hernández-Bernal, J.Dpto. Fisica Aplicada I, Escuela de Ingeniería de Bilbao, UPV/EHUUNSPECIFIED
Sanchez-Lavega, A.Dpto. Física Aplicada, Universidad de Pais Vasco, Bilbao, SpainUNSPECIFIED
del Río-Gaztelurrutia, TeresaDpto. Fisica Aplicada I, Escuela de Ingeniería de Bilbao, UPV/EHUUNSPECIFIED
Hueso, R.Física Aplicada I, Escuela de Ingeniería de Bilbao, Universidad del País Vasco, Bilbao, SpainUNSPECIFIED
Ordonez-Etxeberria, I.Dpto. Física Aplicada, Universidad de Pais Vasco, Bilbao, SpainUNSPECIFIED
Cardesin-Moinelo, AlejandroEuropean Space Agency, ESAC, Villanueva de la Canada, SpanienUNSPECIFIED
Ravanis, E.M.European Space Agency, ESACUNSPECIFIED
Wood, S.European Space Agency, ESOC, Darmstadt, GermanyUNSPECIFIED
Titov, D.ESA/ESTECUNSPECIFIED
Connour, K.Laboratory for Atmospheric and Space Physics, University of ColoradoUNSPECIFIED
Schneider, N.Laboratory for Atmospheric and Space Physics, University of ColoradoUNSPECIFIED
Tirsch, DanielaDaniela.Tirsch (at) dlr.dehttps://orcid.org/0000-0001-5905-5426
Jaumann, RalfFreue Universität Berlinhttps://orcid.org/0000-0002-9759-6597
Hauber, ErnstErnst.Hauber (at) dlr.dehttps://orcid.org/0000-0002-1375-304X
Gondet, B.Institut d'Astrophysique Spatiale, CNRS, Orsay, FrankreichUNSPECIFIED
Date:2020
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 433
Status:Published
Keywords:Mars, atmosphere, clouds, Mars Express
Event Title:EGU General Assembly 2020
Event Location:virtual conference
Event Type:international Conference
Event Dates:04.-08. Mai 2020
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project Mars Express HRSC
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Tirsch, Daniela
Deposited On:26 Nov 2020 07:41
Last Modified:26 Nov 2020 07:41

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