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The unstable CO2 feedback cycle on ocean planets

hal.structure.identifierCenter for Space and Habitability [CSH]
dc.contributor.authorKITZMANN, D.,
hal.structure.identifierCenter for Space and Habitability [CSH]
dc.contributor.authorALIBERT, Y.,
hal.structure.identifierDLR Institut für Planetenforschung
dc.contributor.authorGODOLT, M.,
hal.structure.identifierDLR Institut für Planetenforschung
dc.contributor.authorGRENFELL, J. L.,
hal.structure.identifierCenter for Space and Habitability [CSH]
dc.contributor.authorHENG, K.,
hal.structure.identifierZentrum für Astronomie und Astrophysik [Berlin] [ZAA]
dc.contributor.authorPATZER, A. B. C.,
hal.structure.identifierDLR Institut für Planetenforschung
dc.contributor.authorRAUER, H.,
hal.structure.identifierDLR Institut für Planetenforschung
dc.contributor.authorSTRACKE, B.,
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorVON PARIS, P.
dc.date.issued2015-10
dc.identifier.issn0035-8711
dc.description.abstractEnOcean planets are volatile-rich planets, not present in our Solar system, which are thought to be dominated by deep, global oceans. This results in the formation of high-pressure water ice, separating the planetary crust from the liquid ocean and, thus, also from the atmosphere. Therefore, instead of a carbonate-silicate cycle like on the Earth, the atmospheric carbon dioxide concentration is governed by the capability of the ocean to dissolve carbon dioxide (CO2). In our study, we focus on the CO2 cycle between the atmosphere and the ocean which determines the atmospheric CO2 content. The atmospheric amount of CO2 is a fundamental quantity for assessing the potential habitability of the planet's surface because of its strong greenhouse effect, which determines the planetary surface temperature to a large degree. In contrast to the stabilizing carbonate-silicate cycle regulating the long-term CO2 inventory of the Earth atmosphere, we find that the CO2 cycle feedback on ocean planets is negative and has strong destabilizing effects on the planetary climate. By using a chemistry model for oceanic CO2 dissolution and an atmospheric model for exoplanets, we show that the CO2 feedback cycle can severely limit the extension of the habitable zone for ocean planets.
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.subject.enAstrophysics - Earth and Planetary Astrophysics
dc.subject.enastrobiology, planets and satellites: atmospheres, planets and satellites: oceans, planets and satellites: terrestrial planets
dc.title.enThe unstable CO2 feedback cycle on ocean planets
dc.typeArticle de revue
dc.identifier.doi10.1093/mnras/stv1487
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.identifier.arxiv1507.01727
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page3752 - 3758
bordeaux.volume452
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-01174412
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01174412v1
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