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Search for ongoing volcanic activity on Venus: Case study of Maat Mons, Sapas Mons and Ozza Mons volcanoes

Shalygin, E. V. und Basilevsky, A. T. und Markiewicz, W. J. und Titovv, D. V. und Kreslavsky, M. A. und Roatsch, Thomas (2012) Search for ongoing volcanic activity on Venus: Case study of Maat Mons, Sapas Mons and Ozza Mons volcanoes. Planetary and Space Science, 73 (1), Seiten 294-301. Elsevier. doi: 10.1016/j.pss.2012.08.018. ISSN 0032-0633.

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Offizielle URL: http://dx.doi.org/10.1016/j.pss.2012.08.018

Kurzfassung

We report on attempts to find the ongoing volcanic activity from nearinfrared night-time observations with the Venus Monitoring Camera (VMC) onboard of Venus Express. Here we consider VMC images of the areas of Maat Mons volcano and its vicinities, which, as it follows from analysis of the Magellan data, show evidence of geologically very recent volcanism. Analysis of VMC images taken in 12 observation sessions during the time period from 31 Oct 2007 to 15 Jun 2009 did not reveal any suspicious high-emission spots which could be signatures of the presently ongoing volcanic eruptions.We compare this time sequence of observations with the history of eruptions of volcano Mauna Loa, Hawaii, in the 20th century. This comparison shows that if Maat Mons volcano had the eruption history similar to that of Mauna Loa, the probability to observe an eruption in this VMC observation sequence would be about 8%, meaning that the absence of detection does not mean that Maat is not active in the present epoch. These estimates do not consider the effect of absorption and blurring of the thermal radiation coming from Venus surface by the planet atmosphere and clouds, which decreases detectability of thermal signature of fresh lavas. To assess the role of this effect we simulated near-infrared images of the study area with artificially added circular and rectangular (with different aspect ratios) lava flows having surface temperature 1000K and various areas. These simulations showed that 1 km² lava flows should be marginally seen by VMC. An increase of the lava surface area to 2 – 3km² makes them visible on the plains and increase of the area to 4 – 5km² makes them visible even in deep rift zones. Typical individual lava flows on Mauna Loa are a few km², however, they often have been formed during weeks to months and the instantaneous size of the hot flow surface was usually much smaller. Thus the detection probability is significantly lower than 8%, but it is far from negligible. Our consideration suggests that further search of Maat Mons area and other areas including young rift zones makes sense and should be continued. More effective search could be done if observations simultaneously cover most part of the night side of Venus for relatively long (years) time of continuous observations.

elib-URL des Eintrags:https://elib.dlr.de/77243/
Dokumentart:Zeitschriftenbeitrag
Titel:Search for ongoing volcanic activity on Venus: Case study of Maat Mons, Sapas Mons and Ozza Mons volcanoes
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Shalygin, E. V.MPS LindauNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Basilevsky, A. T.Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS, Kosygin Str. 19, 119991 Moscow, RussiaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Markiewicz, W. J.MPS LindauNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Titovv, D. V.ESTECNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Kreslavsky, M. A.University of California | Santa Cruz, 1156 High St., 95064, Santa Cruz, CA, USANICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Roatsch, Thomasthomas.roatsch (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2012
Erschienen in:Planetary and Space Science
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:73
DOI:10.1016/j.pss.2012.08.018
Seitenbereich:Seiten 294-301
Verlag:Elsevier
ISSN:0032-0633
Status:veröffentlicht
Stichwörter:Venus, Venus Express, Volcanos
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Venus Express Kamera (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Planetengeologie
Hinterlegt von: Roatsch, Dr.rer.nat. Thomas
Hinterlegt am:19 Sep 2012 09:12
Letzte Änderung:11 Dez 2017 10:43

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