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Search for active lava flows with VIRTIS on Venus Express

Müller, N. and Smrekar, S.E. and Helbert, Jörn and Stofan, E. R. and Piccioni, G. and Drossart, P. (2017) Search for active lava flows with VIRTIS on Venus Express. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 122 (5), pp. 1021-1045. Wiley. ISSN 2169-9097

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1002/2016JE005211

Abstract

The Visible Infrared Thermal Imaging Spectrometer (VIRTIS) instrument on Venus Express observed thermal emission from the surface of Venus at 1 μm wavelength and thus would have detected sufficiently bright incandescent lava flows. No eruptions were detected in the observations between April 2006 and October 2008, covering an area equivalent to 7 times the planets surface on separate days. Models of the cooling of lava flows on Earth are adapted to Venus ambient conditions to predict thermal emission based on effusion rate. Taking into account the blurring of surface thermal emission by the atmosphere, the VIRTIS images would detect eruptions with effusion rates above 500 to 1000 m3/s. On Earth such eruptions occur but are rare. Based on an eruption rate and duration distribution fitted to historical data of three terrestrial volcanos, we estimate that only a few percent of all eruptions are detectable. With these assumptions the VIRTIS data can constrain the rate of effusive volcanism on Venus to be less than about 300 km3/yr, at least an order of magnitude higher than existing constraints. There remains a large uncertainty because of unknown properties of lava flows on Venus. Resolving flows in radar imaging and their thickness in altimetry might help to better constrain these properties. While VIRTIS data do not represent a significant constraint on volcanism, an optimized instrument with a 20 times better signal-to-noise ratio would likely be able to detect effusion rates on the order of 50 m3/s.

Item URL in elib:https://elib.dlr.de/116122/
Document Type:Article
Title:Search for active lava flows with VIRTIS on Venus Express
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Müller, N.jet propulsion laboratory, california institute of technology, 4800 oak grove dr., pasadena ca, 91109UNSPECIFIED
Smrekar, S.E.jet propulsion laboratory, california institute of technology, pasadena, usaUNSPECIFIED
Helbert, Jörnjoern.helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Stofan, E. R.proxemy research, 20528 farcroft lane, laytonsville, md 20882, usaUNSPECIFIED
Piccioni, G.inaf-iasfUNSPECIFIED
Drossart, P.observatoire de paris, meudon, franceUNSPECIFIED
Date:10 May 2017
Journal or Publication Title:JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:122
Page Range:pp. 1021-1045
Publisher:Wiley
ISSN:2169-9097
Status:Published
Keywords:Venus volcanism lava venus express
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):Venus Emissivity Mapper
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Leitungsbereich PF
Deposited By: Helbert, Dr.rer.nat. Jörn
Deposited On:30 Nov 2017 13:58
Last Modified:01 Dec 2018 19:53

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