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Di Paolo, Maria 
ORCID: https://orcid.org/0000-0002-0735-2557, Stevens, David P. ORCID: https://orcid.org/0000-0002-7283-4405 and Joshi, Manoj ORCID: https://orcid.org/0000-0002-2948-2811
(2026)
Climate Patterns of Spin-Orbit Resonant Exoplanets Around Low-Mass Stars.
The Astrophysical Journal, 1005 (2).
ISSN 0004-637X
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Abstract
M dwarfs are the most promising candidates for finding habitable worlds through atmospheric characterization. Planets in the habitable zone of low-mass stars experience intense tidal forcings and often become tidally locked. Despite the majority of research being centered on the climate dynamics of synchronously rotating planets in this scenario, synchronous rotation is not an inevitable outcome of tidal locking. Several different circumstances can result in an asynchronous rotation and, in some instances, can lead to spin–orbit resonances (SORs). We explore the climates of two different SOR scenarios with a coupled atmosphere–ocean general circulation climate model. Given the crucial role played by the oceans in shaping planetary climate, we adopt two different ocean tidal forcing parameterizations for each SOR scenario. Each of these cases is simulated with both a dynamic ocean and a thermodynamic ocean. Our findings reveal striking differences between the analyzed resonant case and the commonly studied synchronous rotation case. Periodic climate patterns are observed, with climatic features such as clouds and rainfall exhibiting a 60 ∘ longitudinal shift relative to the substellar point. The evolution of quantities such as thermal emission and reflected light during a stellar period is noteworthy from the observational point of view, showing appreciable differences compared to the synchronous rotation scenario.
| Item Type: | Article |
|---|---|
| Additional Information: | Code and Data Availability: The FORTE2.0 Blaker et al. (2021) code, compilation instructions and example run scripts, together with all necessary ancillary files, are accessible at doi.org/10.5281/zenodo.4108373. The data that support the findings of this study are accessible at doi.org/10.5281/zenodo.17885048. |
| Uncontrolled Keywords: | astrobiology (74),atmospheric circulation (112),atmospheric dynamics (2300),exoplanets (498),habitable planets (695),m stars (985),ocean tides (1152),ocean-atmosphere interactions (1150),planetary atmospheres (1244),planetary climates (2184),spin-orbit resonances (2296),astronomy and astrophysics,space and planetary science ,/dk/atira/pure/subjectarea/asjc/3100/3103 |
| Faculty \ School: | Faculty of Science > School of Engineering, Mathematics and Physics University of East Anglia Research Groups/Centres > Theme - ClimateUEA Faculty of Science > School of Environmental Sciences Faculty of Science > Tyndall Centre for Climate Change Research University of East Anglia Research Groups/Centres > Faculty of Science > Research Centres > Tyndall Centre for Climate Change Research |
| UEA Research Groups: | Faculty of Science > Research Groups > Fluids & Structures Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences Faculty of Science > Research Groups > Climatic Research Unit |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 28 May 2026 14:09 |
| Last Modified: | 07 Jul 2026 15:55 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/103193 |
| DOI: | 10.3847/1538-4357/ae733d |
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