Journal of Advances in Modeling Earth Systems (Apr 2020)

Implementation of the CMIP6 Forcing Data in the IPSL‐CM6A‐LR Model

  • Thibaut Lurton,
  • Yves Balkanski,
  • Vladislav Bastrikov,
  • Slimane Bekki,
  • Laurent Bopp,
  • Pascale Braconnot,
  • Patrick Brockmann,
  • Patricia Cadule,
  • Camille Contoux,
  • Anne Cozic,
  • David Cugnet,
  • Jean‐Louis Dufresne,
  • Christian Éthé,
  • Marie‐Alice Foujols,
  • Josefine Ghattas,
  • Didier Hauglustaine,
  • Rong‐Ming Hu,
  • Masa Kageyama,
  • Myriam Khodri,
  • Nicolas Lebas,
  • Guillaume Levavasseur,
  • Marion Marchand,
  • Catherine Ottlé,
  • Philippe Peylin,
  • Adriana Sima,
  • Sophie Szopa,
  • Rémi Thiéblemont,
  • Nicolas Vuichard,
  • Olivier Boucher

DOI
https://doi.org/10.1029/2019MS001940
Journal volume & issue
Vol. 12, no. 4
pp. n/a – n/a

Abstract

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Abstract The implementation of boundary conditions is a key aspect of climate simulations. We describe here how the Climate Model Intercomparison Project Phase 6 (CMIP6) forcing data sets have been processed and implemented in Version 6 of the Institut Pierre‐Simon Laplace (IPSL) climate model (IPSL‐CM6A‐LR) as used for CMIP6. Details peculiar to some of the Model Intercomparison Projects are also described. IPSL‐CM6A‐LR is run without interactive chemistry; thus, tropospheric and stratospheric aerosols as well as ozone have to be prescribed. We improved the aerosol interpolation procedure and highlight a new methodology to adjust the ozone vertical profile in a way that is consistent with the model dynamical state at the time step level. The corresponding instantaneous and effective radiative forcings have been estimated and are being presented where possible.