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Terrestrial magma ocean evolution: Building an atmosphere under the young Sun.

Nikolaou, Athanasia and Katyal, N and Tosi, Nicola and Godolt, M and Grenfell, J L and Rauer, H (2018) Terrestrial magma ocean evolution: Building an atmosphere under the young Sun. Environments of Terrestrial Planets Under the Young Sun: Seeds of Biomolecules Symposium, 09-13 April 2018, Greenbelt, MD, USA.

Full text not available from this repository.

Abstract

The magma ocean is an early stage in the terrestrial planet evolution attributed to energy delivery by protoplanetary impacts and early radioactive elements’ decay. Its duration sets a period of particularly high temperatures at the surface (>1500 K), enough to melt the silicate mantle. Simultaneously, it enables massive volatile degassing from the interior. As such, the magma ocean thermal evolution controls the build up of the secondary atmosphere and the conditions at the surface. It is thus crucial to constrain its lifetime as it governs the mass and composition of the atmosphere which receives the early stellar XUV activity. We look at degassing of H2O and CO2, a volatile choice compatible with an oxidized mantle. A grey and a line-by-line atmosphere are alternatively used to resolve the coupled interior-atmosphere thermal evolution. In addition to other factors we find that the water vapour can decelerate substantially the magma ocean solidification. On the contrary, the lack of atmosphere or rapid escape thereof restricts its duration by two orders of magnitude. Since the degassing of H2O and CO2 from the interior does not occur simultaneously, qualitative switches of atmospheric composition from CO2 to H2O-dominated are expected, that could affect atmospheric escape processes.

Item URL in elib:https://elib.dlr.de/119489/
Document Type:Conference or Workshop Item (Poster)
Title:Terrestrial magma ocean evolution: Building an atmosphere under the young Sun.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nikolaou, AthanasiaAthanasia.Nikolaou (at) dlr.deUNSPECIFIED
Katyal, NNisha.Katyal (at) dlr.deUNSPECIFIED
Tosi, Nicolanicola.tosi (at) dlr.deUNSPECIFIED
Godolt, MTU BerlinUNSPECIFIED
Grenfell, J LLee.Grenfell (at) dlr.deUNSPECIFIED
Rauer, Hheike.rauer (at) dlr.deUNSPECIFIED
Date:2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:magma ocean, accretion, secondary atmosphere, Earth, terrestrial planets, early evolution, modeling, simulation
Event Title:Environments of Terrestrial Planets Under the Young Sun: Seeds of Biomolecules Symposium
Event Location:Greenbelt, MD, USA
Event Type:international Conference
Event Dates:09-13 April 2018
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):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Nikolaou, Athanasia
Deposited On:19 Apr 2018 12:02
Last Modified:01 Dec 2018 19:53

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