[A-CG35] Projection and detection of global environmental change

[ACG35-07] Tracking improvement in simulated marine biogeochemistry between CMIP5 and CMIP6

★Invited Papers

*Roland Seferian¹, Sarah Berthet¹, Andrew Yool², Julien Palmiéri², Laurent Bopp³, Alessandro Tagliabue⁴, Lester Kwiatkowski⁵, Olivier Aumont⁵, James Christian⁶, John Dunne⁷, Marion Gehlen⁸, Tatiana Ilyina⁹, Jasmin G. John⁷, Hongmei Li⁹, Matt Long¹⁰, Jessica Y. Luo⁷, Hideyuki Nakano¹¹, Anastasia Romanou¹², Jörg Schwinger¹³, Charles Stock⁷, Yeray Santana-Falcón¹, Yohei Takano⁹, Jerry Tjiputra¹³, Hiroyuki Tsujino¹¹, Michio Watanabe¹⁴, Tongwen Wu¹⁵, Fanghua Wu¹⁵, Akitomo Yamamoto¹⁴ (1.CNRM, Universite de Toulouse, Meteo-France, CNRS, Toulouse, France , 2.National Oceanography Centre, European Way, Southampton, SO14 3ZH, UK, 3.LMD-IPSL, CNRS, Ecole Normale Supérieure / PSL Res. Univ, Ecole Polytechnique, Sorbonne Université, Paris, France , 4.School of Environmental Sciences, University of Liverpool, Liverpool, UK , 5.LOCEAN Laboratory, Sorbonne Université-CNRS-IRD-MNHN, Paris, France, 6.Canadian Centre for Climate Modelling and Analysis, Victoria, BC, Canada, 7.NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA, 8.LSCE-IPSL, Université Paris Saclay, Gif-sur-Yvette, France, 9.Max Planck Institute for Meteorology, Hamburg, Germany, 10.National Center for Atmospheric Research, Boulder, Colorado, USA, 11.JMA Meteorological Research Institute, Tsukuba, Japan, 12.NASA Goddard Institute for Space Studies, New York, USA, 13.NORCE Climate, Bjerknes Centre for Climate Research, Bergen, Norway, 14.Research Center for Environmental Modeling and Application, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan, 15.Beijing Climate Center, China Meteorological Administration, Beijing, China)

Keywords:Marine biogeochemistry, Earth system modelling, CMIP6

Increasing availability of ocean biogeochemical data, as well as an improved understanding of the underlying processes, allow advances in the marine biogeochemical components of the current generation of Earth system models (ESMs). The present study scrutinizes the extent to which marine biogeochemistry components of ESMs have progressed between the 5th and the 6th phases of the Coupled Model Intercomparison Project (CMIP).
The changes or updates in ocean biogeochemistry component have been mapped between CMIP5 and CMIP6 model versions across several axes, including model resolution, complexity and the interactions of marine biogeochemistry with climate or ocean physics.
Closely related to the review of the changes or updates in ocean biogeochemistry component within CMIP5 and CMIP6 ESMs, an skill assessment have been made to determine how far these changes have led to improvements in the simulated mean-state of marine biogeochemical models within the current generation of ESMs.
This work shows that the representation of marine biogeochemistry has progressed within the current generation of Earth system models. However, it remains difficult to identify which model updates are responsible for a given improvement. In addition, the full potential of marine biogeochemistry in terms of Earth system interactions and climate feedback remains poorly examined in the current generation of Earth system models.