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SUMMARY:Coupling Planetary and Ecosystem Modeling to Asses Habitability an
 d Inhabitation in the Solar System and beyond - Stephane Mazevet\, Observa
 toire de la Cote d'Azur\, Nice (France)
DTSTART:20241127T160000Z
DTEND:20241127T170000Z
UID:TALK224512@talks.cam.ac.uk
CONTACT:Selen Etingü
DESCRIPTION:With thousands of exoplanets now identified\, the characteriza
 tion of habitable planets and the potential identification of inhabited on
 es is a major challenge for the coming decades. To address this challenge\
 , we developed an innovative approach to assess habitability and inhabitat
 ion by coupling for the first time the atmosphere and the interior modelin
 g with the biological activity based on ecosystem modeling. We applied the
  approach to various situations where habitability and inhabitation are in
  question: the possibility of methanogenic activity at the Enceladus ocean
  floor [1]\, the impact of methanogenic activity on the composition of the
  early Earth and early Mars atmospheres and its influence on the long term
  climate[2\,3]. During this talk\, we will focus on the evolution of earth
 -like planets around G-type stars and strategies that can be elaborated to
  validate the concept of habitable planets so as to inform the design of f
 uture space missions[4\,5].\n\n[1] A. Affholder\, F. Guyot\, B. Sauterey\,
  R. Ferrière\, S. Mazevet\, “Bayesian analysis of Enceladus’s plume d
 ata to assess\nmethanogenesis”\, Nature Astronomy 5 (2021)\, p. 805-814.
 \n[2] B. Sauterey\, B. Charnay\, A. Affholder\, S. Mazevet\, R.F errière\
 ,“Co-evolution of primitive methane-cycling ecosystems and early Earth
 ’s atmosphere and climate”\, Nature Communications 11 (2020).\n[3] B. 
 Sauterey\, B. Charnay\, A. Affholder\, S. Mazevet\, R. Ferrière\,“Early
  Mars habitability and global cooling by H2-based\nmethanogens”\, Nature
  Astronomy (2022).\n[4] S. Mazevet\, A. Affholder\, B. Sauterey\, A. Bixel
 \, D. Apai and R. Ferriere « Prospects for the characterization of habita
 ble planets »\, Comptes rendus de l’académie des sciences\, physique\,
  pp. 1-16. doi : 10.5802/crphys.154. (2023).\n[5] A. Affholder\, B. Sauter
 ey\, D. Apai\, R. Ferrière\, S. Mazevet  « Interior convection regime de
 termination of atmospheric CO2 abundance and habitability of terrestrial e
 xoplanets » Under review\n\n
LOCATION:West Hub\, West Cambridge Campus\,  EAST Room 1-First Floor
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