Responsible activity: CMIP

In combination with piClim-control, quantifies present-day total anthropogenic effective radiative forcing (ERF). Same as piClim-control, except all anthropogenic forcings use present-day values (in CMIP defined as the last year of the historical simulation within the same CMIP era i.e. 2021 values for CMIP7).

Experiment set up¶

The piClim-anthro simulation uses the same forcings as piClim-control, except all anthropogenic forcings use 2021 values. The 2021 values should be prescribed on repeat throughout the simulation. Here, all anthropogenic forcings means all forcings included in the historical simulation except for solar and stratospheric aerosol forcing (these two forcings should remain as in piClim-control).

It is recommended that you use the same time axis as you use for your piClim-control output to make life easy for analysts of your output (although this is not enforced so you are technically free to start the time axis of your outputs at whatever year you like). Simulations should be at least 30 years in length. Only one ensemble member is required.

Parent experiment¶

piClim-anthro does not branch from another simulation.

Forcings¶

General headlines¶

See general headlines for the piClim-control simulation.

Notes¶

See notes for the piClim-control simulation.

Versions to use¶

For natural forcings i.e. solar and stratospheric aerosol forcing, and the prescribed sea-surface temperatures and sea-ice concentrations the relevant forcing is the same as for the piClim-control simulation. For all other forcings i.e. anthropogenic forcings, the forcing versions relevant for this simulation are the same as for the historical simulation.

Getting the data¶

See instructions for thepiClim-control simulation and historical simulation.