Meta-modelling the climate of dry tide locked rocky planets
arXiv:2203.14929 · doi:10.1051/0004-6361/202243099
Abstract
Rocky planets hosted by close-in extrasolar systems are likely to be tidally locked in 1:1 spin-orbit resonance, a configuration where they exhibit permanent dayside and nightside. Because of the resulting day-night temperature gradient, the climate and large-scale circulation of these planets are strongly determined by their atmospheric stability against collapse, which designates the runaway condensation of greenhouse gases. To better constrain the surface conditions of rocky planets located in the habitable zone of their host star, it is therefore crucial to elucidate the mechanisms that govern the day-night heat redistribution. As a first attempt to bridge the gap between multiple modelling approaches ranging from idealised models to 3-D General Circulation Models (GCM), we developed a General Circulation Meta-Model (GCMM) able to reproduce both the closed-form solutions provided by analytical models and the numerical solutions obtained from GCM simulations. We used this approach to characterise the atmospheric stability of Earth-sized rocky planets with dry atmospheres containing CO2, and we benchmarked it against 3-D GCM simulations using THOR GCM. We observe that the collapse pressure below which collapse occurs can vary by ~40% around the value predicted by analytical scaling laws depending on the mechanisms taken into account among radiative transfer, atmospheric dynamics, and turbulent diffusion. Particularly, we find (i) that the turbulent diffusion taking place in the dayside planetary boundary layer (PBL) globally tends to warm up the nightside surface hemisphere except in the transition zone between optically thin and optically thick regimes, (ii) that the PBL also significantly affects the day-night advection timescale, and (iii) that the slow rotator approximation holds from the moment that the normalised equatorial Rossby deformation radius is greater than 2.
arXiv comment32 pages, 16 figures, accepted for publication in Astronomy & Astrophysics
References in corpus (49)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- Habitable Zones Around Main-Sequence Stars: New Estimates
- Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
- CODATA Recommended Values of the Fundamental Physical Constants: 2014
- Atmospheric Circulation and Tides of "51Peg b-like" Planets
- Equatorial superrotation on tidally locked exoplanets
- The nature of the TRAPPIST-1 exoplanets
- A Revised Exoplanet Yield from the Transiting Exoplanet Survey Satellite (TESS)
- Discovery and Characterization of Transiting SuperEarths Using an All-Sky Transit Survey and Follow-up by the James Webb Space Telescope
- 3D climate modeling of close-in land planets: Circulation patterns, climate moist bistability and habitability
- A decreased probability of habitable planet formation around low-mass stars
- Habitable Moist Atmospheres On Terrestrial Planets Near the Inner Edge Of the Habitable Zone Around M-dwarfs
- Modelling climate diversity, tidal dynamics and the fate of volatiles on TRAPPIST-1 planets
- Atmospheric Circulation of Hot Jupiters: Dayside-Nightside Temperature Differences
- Asynchronous rotation of Earth-mass planets in the habitable zone of lower-mass stars
- Atmospheric dynamics of Earth-like tidally locked aquaplanets
- Falling Transiting Extrasolar Giant Planets
- Is Gliese 581d habitable? Some constraints from radiative-convective climate modeling
- Demarcating circulation regimes of synchronously rotating terrestrial planets within the habitable zone
- Tides and the Evolution of Planetary Habitability
- The potential for Earth-mass planet formation around brown dwarfs
- An Analytic Radiative-Convective Model for Planetary Atmospheres
- 3D Structures of equatorial waves and the resulting superrotation in the atmosphere of a tidally locked hot Jupiter
- Deformation and tidal evolution of close-in planets and satellites using a Maxwell viscoelastic rheology
- Effects of Bulk Composition on The Atmospheric Dynamics on Close-in Exoplanets
- The rotational and divergent components of atmospheric circulation on tidally locked planets
- Three-Dimensional Circulation Driving Chemical Disequilibrium in WASP-43b
- Temperature Structure and Atmospheric Circulation of Dry, Tidally Locked Rocky Exoplanets
- Deciphering thermal phase curves of dry, tidally locked terrestrial planets
- Linking the Climate and Thermal Phase Curve of 55 Cancri e
- "Weather" Variability Of Close-in Extrasolar Giant Planets
- On the Stability of Super-Earth Atmospheres
- Atmospheric convection plays a key role in the climate of tidally-locked terrestrial exoplanets: insights from high-resolution simulations
- THOR: A New and Flexible Global Circulation Model to Explore Planetary Atmospheres
- Connecting the dots: A versatile model for the atmospheres of tidally locked Super-Earths
- Atmospheric Circulations of Hot Jupiters as Planetary Heat Engines
- A Scaling for Atmospheric Heat Redistribution on Tidally-Locked Rocky Planets
- A Low-order Model of Water Vapor, Clouds, and Thermal Emission for Tidally Locked Terrestrial Planets
- THOR 2.0: Major Improvements to the Open-Source General Circulation Model
- Extremely long convergence times in a 3D GCM simulation of the sub-Neptune Gliese 1214b
- Atmospheric Circulation of Terrestrial Exoplanets
- Final spin states of eccentric ocean planets
- Earths polar night boundary layer as an analogue for dark side inversions on synchronously rotating terrestrial exoplanets
- Atmospheric dynamics of temperate sub-Neptunes. Part I: dry dynamics
- Atmospheric stability and collapse on tidally locked rocky planets
- A generic frequency dependence for the atmospheric tidal torque of terrestrial planets
- Modelling the 3D Climate of Venus with OASIS
- The Phase-curve Signature of Condensible Water-rich Atmospheres on Slowly Rotating Tidally Locked Exoplanets