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  • Sergeev, Denis E.Univ Exeter, Coll Engn Math & Phys Sci, Dept Math, Exeter EX4 4QF, England. (author)

The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI). II. Moist Cases-The Two Waterworlds

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • IOP Publishing Ltd,2022
  • printrdacarrier

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  • LIBRIS-ID:oai:DiVA.org:uu-496706
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-496706URI
  • https://doi.org/10.3847/PSJ/ac6cf2DOI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

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  • To identify promising exoplanets for atmospheric characterization and to make the best use of observational data, a thorough understanding of their atmospheres is needed. Three-dimensional general circulation models (GCMs) are one of the most comprehensive tools available for this task and will be used to interpret observations of temperate rocky exoplanets. Due to parameterization choices made in GCMs, they can produce different results, even for the same planet. Employing four widely used exoplanetary GCMs-ExoCAM, LMD-G, ROCKE-3D, and the UM-we continue the TRAPPIST-1 Habitable Atmosphere Intercomparison by modeling aquaplanet climates of TRAPPIST-1e with a moist atmosphere dominated by either nitrogen or carbon dioxide. Although the GCMs disagree on the details of the simulated regimes, they all predict a temperate climate with neither of the two cases pushed out of the habitable state. Nevertheless, the intermodel spread in the global mean surface temperature is nonnegligible: 14 K and 24 K in the nitrogen- and carbon dioxide-dominated case, respectively. We find substantial intermodel differences in moist variables, with the smallest amount of clouds in LMD-Generic and the largest in ROCKE-3D. ExoCAM predicts the warmest climate for both cases and thus has the highest water vapor content and the largest amount and variability of cloud condensate. The UM tends to produce colder conditions, especially in the nitrogen-dominated case due to a strong negative cloud radiative effect on the day side of TRAPPIST-1e. Our study highlights various biases of GCMs and emphasizes the importance of not relying solely on one model to understand exoplanet climates.

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  • Fauchez, Thomas J.NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.;Univ Space Res Assoc USRA, Goddard Earth Sci Technol & Res GESTAR, Columbia, MD USA.;NASA, GSFC Sellers Exoplanet Environm Collaborat, Greenbelt, MD USA. (author)
  • Turbet, MartinUniv Geneva, Observ Astron, Chemin Maillettes 51, CH-1290 Versoix, Switzerland.;Sorbonne Univ, PSL Res Univ, Ecole Normale Super, Ecole Polytech,Lab Meteorol Dynam,IPSL,CNRS, F-75005 Paris, France. (author)
  • Boutle, Ian A.Met Off, FitzRoy Rd, Exeter EX1 3PB, England.;Univ Exeter, Coll Engn Math & Phys Sci, Dept Astrophys, Exeter EX4 4QL, England. (author)
  • Tsigaridis, KostasColumbia Univ, Ctr Climate Syst Res, New York, NY USA.;NASA, Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA. (author)
  • Way, Michael J.Uppsala universitet,Observationell astrofysik,Teoretisk astrofysik,NASA, GSFC Sellers Exoplanet Environm Collaborat, Greenbelt, MD USA.;NASA, Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA.;Uppsala Univ, Dept Phys & Astron, Theoret Astrophys, Uppsala, Sweden.(Swepub:uu)micwa958 (author)
  • Wolf, Eric T.NASA, GSFC Sellers Exoplanet Environm Collaborat, Greenbelt, MD USA.;Univ Colorado Boulder, Lab Atmospher & Space Phys, Boulder, CO USA.;NASA, NExSS Virtual Planetary Lab, Seattle, WA 98195 USA. (author)
  • Domagal-Goldman, Shawn D.NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.;NASA, GSFC Sellers Exoplanet Environm Collaborat, Greenbelt, MD USA.;NASA, NExSS Virtual Planetary Lab, Seattle, WA 98195 USA. (author)
  • Forget, FrancoisSorbonne Univ, PSL Res Univ, Ecole Normale Super, Ecole Polytech,Lab Meteorol Dynam,IPSL,CNRS, F-75005 Paris, France. (author)
  • Haqq-Misra, JacobNASA, NExSS Virtual Planetary Lab, Seattle, WA 98195 USA.;Blue Marble Space Inst Sci, Seattle, WA USA. (author)
  • Kopparapu, Ravi K.NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.;NASA, GSFC Sellers Exoplanet Environm Collaborat, Greenbelt, MD USA.;NASA, NExSS Virtual Planetary Lab, Seattle, WA 98195 USA. (author)
  • Lambert, F. HugoUniv Exeter, Coll Engn Math & Phys Sci, Dept Math, Exeter EX4 4QF, England. (author)
  • Manners, JamesMet Off, FitzRoy Rd, Exeter EX1 3PB, England. (author)
  • Mayne, Nathan J.Univ Exeter, Coll Engn Math & Phys Sci, Dept Astrophys, Exeter EX4 4QL, England. (author)
  • Univ Exeter, Coll Engn Math & Phys Sci, Dept Math, Exeter EX4 4QF, England.NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.;Univ Space Res Assoc USRA, Goddard Earth Sci Technol & Res GESTAR, Columbia, MD USA.;NASA, GSFC Sellers Exoplanet Environm Collaborat, Greenbelt, MD USA. (creator_code:org_t)

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  • In:The Planetary Science Journal: IOP Publishing Ltd3:92632-3338

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