Experiment Setup and Forcings Guidance: hist-piAQ

Used to diagnose climate and air quality responses to the regionally heterogeneous evolution of anthropogenic non-CH4 SLCF emissions. Anthropogenic non-CH4 tropospheric O3 precursor emissions (NMVOCs, CO, NOx), aerosols, and aerosol precursor emissions (BC, OC, NH3, SO2) evolve as in piControl. All other forcings evolve as in historical. Requires interactive chemistry. Models without interactive chemistry should run hist-piAer instead. (Renamed from hist-piNTCF in AerChemMIP phase 1.)

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:

Paired experiments

  • hist-piAer is the corresponding non-interactive-chemistry experiment for models that do not include interactive chemistry.

Experiment set up

Parent experiment and branching

The hist-piAQ 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 historical.

Output time axis

Your output time axis must start on 1850-01-01 and must end on 2021-12-31. You must perform the full simulation i.e. 172 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 hist-piAQ experiment is a transient forcings experiment.

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 land use, greenhouse gas concentrations, stratospheric aerosol forcing, ozone, nitrogen deposition, solar, aerosol optical properties, population density

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

For the following forcings, please use data from the specified experiments with the specified modifications.

  • for anthropogenic emissions, use the forcings from historical but aerosol (BC, OC, NH3, SO2) and tropospheric non-methane ozone precursor emissions (NMVOCs, CO, NOx) should be fixed to piControl simulation values
  • for biomass burning emissions, use the forcings from historical but aerosol (BC, OC, NH3, SO2) and tropospheric non-methane ozone precursor emissions (NMVOCs, CO, NOx) should be fixed to piControl simulation values

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.