AerChemMIP forcing fields

Forcing fields constituting tropospheric and stratospheric ozone as well as aerosols shall be prepared for CMIP6 models wishing to use such fields. Ideally such fields are produced from an ensemble of high quality chemical transport models, with latest emissions prepared for CMIP6. See also time line

This page summarises status wrt Contact person, contributing modellers, details of simulations (timeline, emissions, merging concept, output), timeline for simulations and availability

Stratospheric Ozone

Michaela Heggelin / Jean Francois Lamarque

Tropospheric Ozone

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Stratospheric Aerosol

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Tropospheric Aerosol

Because of the central role of aerosols in many of the AerChemMIP simulations and analysis, we suggest that climate models without prognostic aerosol schemes refrain from participating in AerChemMIP. It is important to note that the models participating in AerChemMIP must use for the corresponding, qualifying DECK and historical simulation emissions of aerosols and aerosol precursors provided by Smith et al. in the end of 2015. The CMIP6 aerosol forcing dataset shall not be used for DECK and historical simulations. However modeling groups are encouraged to participate with their AerChemMIP model version in the prescribed aerosol subset of RFMIP simulations, where the CMIP6 aerosol forcing dataset is required. In that case the aerosol radiative effects will have to be decoupled from the interactive aerosol scheme and prescribed optical properties from the RFMIP aerosol forcing dataset shall be used.

However - based on AerChemMIP simulations joint multi-model ensemble based aerosol climatologies (AOD and MMR) may be compiled during 2016/2017, which make use of the AerChemMIP simulations.

Contact. Gunnar Myhre / Michael Schulz