In combination with piClim-control, quantifies transient aerosol effective radiative forcing (ERF) over the historical period and the scen7-m or esm-scen7-m experiment (whichever is relevant to your model setup). This can be compared with piClim-aer which provides a more precise quantification of present-day aerosol ERF.

• Responsible activity: RFMIP
• Tier: 1
• MIP co-chair review: In progress see https://github.com/WCRP-CMIP/cmip7-guidance/issues/192

This page is intended to help with implementation. If you notice something that is unclear, please raise an issue.

For the full background of the experiment, please see the following URLs:

• https://doi.org/10.5194/acp-20-9591-2020
• https://doi.org/10.5194/gmd-9-3447-2016

Experiment set up¶

piClim-histaer is the same setup as piClim-control, except aerosol emissions follow the historical simulation experiment then the scen7-m experiment.

Parent experiment and branching¶

The piClim-histaer experiment branches from the piControl experiment (part of CMIP). The parent experiment's MIP era is CMIP7.

Branch from piControl at the same time as piClim-control.

Output time axis¶

Your output time axis must start on 1850-01-01 and must end on 2100-12-31. You must perform the full simulation i.e. 251 simulation years.

Minimum ensemble size¶

Only one ensemble member is required.

Forcings¶

The following information will help you identify the forcings to use. However, we can't define every single detail because there can be lots of subjective steps between the raw forcings data and model inputs (e.g. interpolation, re-aggregation, supplementation with other information). If further guidance would be helpful, please raise an issue.

General headlines¶

The piClim-histaer experiment uses a mix of fixed and transient forcings. The fixed forcings are: aerosol optical properties, greenhouse gas concentrations, land use, nitrogen deposition, ozone, population density, sea-surface temperature forcing, solar and stratospheric aerosol forcing. The transient forcings are: anthropogenic emissions and biomass burning emissions.

Data¶

Here we make a distinction between data that is described on other experiment pages, data that is described on other experiment pages with modifications you have to make yourself, data available via ESGF's input4MIPs project and data distributed via other channels.

Data described on other experiment pages¶

For the following data, please see these other experiment pages:

• historical for anthropogenic emissions, biomass burning emissions
• scen7-m for anthropogenic emissions, biomass burning emissions
• piControl for land use, greenhouse gas concentrations, stratospheric aerosol forcing, solar, aerosol optical properties, population density, ozone, nitrogen deposition
• piClim-control for sea-surface temperature forcing

Data described on other experiment pages with modifications you have to make¶

No data described on other experiment pages requires modifications by you. Please see the other data sub-sections for details of the forcings data to use for this experiment.

Data available via input4MIPs¶

No input4MIPs-based data is described specifically on this page. Please see the other data sub-sections for details of the forcings data to use for this experiment.

Data not available via input4MIPs¶

No data that is not input4MIPs-based is described specifically on this page. Please see the other data sub-sections for details of the forcings data to use for this experiment.