Responsible activity: CMIP

Baseline for effective radiative forcing (ERF) calculations. piControl with prescribed sea-surface temperatures and sea-ice concentrations.

Experiment set up¶

The piClim-control simulation uses the same forcings as piControl, with the extra specification that sea-surface temperatures and sea-ice concentrations are prescribed. The prescribed sea-surface temperatures and sea-ice concentrations must come from a (monthly varying, annually repeating) climatology taken from at least 30 years of your pre-industrial control simulation (i.e. these forcings are derived from your model output from one of your own simulations, they are not provided by a forcings provider).

The start-time of the simulation is not tied to a particular year but, rather, can be chosen arbitrarily (e.g., year 200 or year 1850 or year 1). If you have no other strong feeling, then it may be clearest to set the start-time to be equal to the middle of the period over which the climatology was taken from the pre-industrial control experiment. For example, if your climatology is taken over the years 120-150 in the pre-industrial control experiment, then you could start the time axis of your piClim-control at 135. Simulations should be at least 30 years in length. Only one ensemble member is required.

Parent experiment¶

piClim-control does not branch from another simulation.

Forcings¶

General headlines¶

The piClim-control experiment is a fixed forcings experiment. For further general headlines, please see the general headlines for the piControl simulation.

Notes¶

See notes for the piControl simulation.

Versions to use¶

The forcings relevant for this simulation are the same as for the piControl simulation.

As noted above, the prescribed sea-surface temperatures and sea-ice concentrations must come from model output from one of your own simulations, they are not provided by a forcings provider. We recommend including information in your piClim-control output that identifies the piControl simulation and time period used to generate the prescribed sea-surface temperatures and sea-ice concentrations.

Getting the data¶

See instructions for the piControl simulation. As noted above, the prescribed sea-surface temperatures and sea-ice concentrations must come from model output from one of your own simulations, they are not provided by a forcings provider.