Responsible activity: CFMIP

Abrupt halving of atmospheric carbon dioxide levels. All other conditions are kept the same as piControl.

Experiment set up¶

The abrupt CO₂ halving simulation is a simple branch from the piControl simulation. After branching, the atmospheric CO₂ concentrations should be set to half the concentrations used in the piControl simulation.

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). However, it is easier for analysts if the start-time is consistent with the branching time in the parent experiment (e.g., if the the simulation branches from year 200 in the parent experiment, then the start time in the child experiment would be set to year 200). Simulations should be at least 300 years in length. Only one ensemble member is required.

Parent experiment¶

abrupt-0p5xCO2 branches from the piControl simulation (part of CMIP).

Branch from piControl at a time of your choosing.

Forcings¶

General headlines¶

See general headlines for the abrupt-4xCO2 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.

Getting the data¶

See instructions for the piControl simulation. You have to halve the atmospheric CO₂ concentrations yourself.