Modelling the climate of rocky planets in 2D and 3D: EOS+ESTM, PLASIM and THOR

May 29 – June 2, 2023

This program is dedicated to systematic comparisons, modifications and validation of the 2D climate model EOS+ESTM vs the 3D climate models PLASIM and THOR. Climate models of different complexities are necessary tools not only in the study of Earth current and past climate, but also for exploring climates and habitability of any rocky planet – in the Solar System and beyond. A hierarchy of model complexities is required to (i) disentangle the role of the different physical and feedback processes acting and interacting to determine the surface temperature; (ii) extract and validate simpler but computationally faster physical parametrizations to be used in lower- complexity and lower-dimension climate models (allowing multi-parametric studies); (iii) study definitely non-Earth-like conditions (e.g. tidally-locked planets; different atmospheric pressures and compositions). The main aims of the program are: to modify the PLASIM code, whose public version has modern Earth properties hard-wired, for a general use for exoplanets and in particular for tidally-locked planets; to evaluate if and how to improve its radiative transfer part; to compare standard fluid- dynamics tests between PLASIM and THOR; to perform sensitivity tests to all models and compare/adjust the relevant EOS+ESTM parametrizations according to the results.

Project proponent:

  • Laura Silva (INAF – Osservatorio Astronomico di Trieste)

List of participants:

  • Jost von Hardenberg (Politecnico di Torino)
  • Giuseppe Murante (INAF – Osservatorio Astronomico di Trieste)
  • Antonello Provenzale (CNR-IGG Pisa)
  • Laura Silva (INAF – Osservatorio Astronomico di Trieste)
  • Paolo Simonetti (INAF – Osservatorio Astronomico di Trieste)