DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Redox state and interior structure control on the long-term habitability of stagnant-lid planets

Baumeister, Philipp and Tosi, Nicola and Brachmann, Caroline and Grenfell, John Lee and Noack, Lena (2023) Redox state and interior structure control on the long-term habitability of stagnant-lid planets. Astronomy & Astrophysics. EDP Sciences. doi: 10.1051/0004-6361/202245791. ISSN 0004-6361. (In Press)

Full text not available from this repository.

Official URL: https://dx.doi.org/10.1051/0004-6361/202245791


Context. A major goal in the search for extraterrestrial life is the detection of liquid water on the surface of exoplanets. On terrestrial planets, volcanic outgassing is a significant source of atmospheric and surface water and a major contributor to the long-term evolution of the atmosphere. The rate of volcanism depends on the interior evolution and on numerous feedback processes between the atmosphere and interior, which continuously shape atmospheric composition, pressure, and temperature. Aims. We explore how key planetary parameters, such as planet mass, interior structure, mantle water content, and redox state, shape the formation of atmospheres that permit liquid water on the surface of planets. Methods. We present the results of a comprehensive 1D model of the coupled evolution of the interior and atmosphere of rocky exoplanets that combines central feedback processes between these two reservoirs. We carried out more than 280000 simulations over a wide range of mantle redox states and volatile content, planetary masses, interior structures, and orbital distances in order to robustly assess the emergence, accumulation, and preservation of surface water on rocky planets. To establish a conservative baseline of which types of planets can outgas and sustain water on their surface, we focus here on stagnant-lid planets. Results. We find that only a narrow range of the mantle redox state around the iron-wüstite buffer allows the formation of atmospheres that lead to long-term habitable conditions. At oxidizing conditions similar to those of the Earth's mantle, most stagnant-lid planets end up in a hothouse regime akin to Venus due to strong CO2 outgassing. At more reducing conditions, the amount of outgassed greenhouse gases is often too low to keep surface water from freezing. In addition, Mercury-like planets with large metallic cores are able to sustain habitable conditions at an extended range of orbital distances as a result of lower volcanic activity.

Item URL in elib:https://elib.dlr.de/195684/
Document Type:Article
Additional Information:Bisher nur online erschienen.
Title:Redox state and interior structure control on the long-term habitability of stagnant-lid planets
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Baumeister, PhilippUNSPECIFIEDhttps://orcid.org/0000-0001-9284-0143UNSPECIFIED
Tosi, NicolaUNSPECIFIEDhttps://orcid.org/0000-0002-4912-2848UNSPECIFIED
Brachmann, CarolineUNSPECIFIEDhttps://orcid.org/0009-0006-4753-7536UNSPECIFIED
Noack, LenaFreie Universität Berlin, Department of Earth Sciences, Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Date:7 June 2023
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:EDP Sciences
Status:In Press
Keywords:terrestrial planets, planet evolution, planet interiors, atmospheres, oceans, numerical methods, outgassing, Venus, exoplanets, habitability
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Robotics
DLR - Research area:Raumfahrt
DLR - Program:R RO - Robotics
DLR - Research theme (Project):R - Planetary Exploration, R - Planetary Evolution and Life
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Baumeister, Philipp
Deposited On:27 Jun 2023 13:24
Last Modified:26 Mar 2024 14:33

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.