AMIP Experiment Setup and Forcings Guidance

Responsible activity: CMIP

Atmosphere-only simulation with prescribed sea surface temperatures (SSTs) and sea-ice concentrations.

Experiment set up

The amip simulation uses a specific set of forcings (see forcings). These should be applied as transient (i.e. time-changing) forcings over the length of the simulation.

The simulation output should start on 1979-01-01 and end on 2021-12-31. Only one ensemble member is required.

Parent experiment

amip has no parent experiment.

Forcings

General headlines

The amip experiment is a time-varying forcings experiment.

Notes

See notes for the piControl simulation.

The following pages give further information on each forcing beyond the ones used in the historical simulation:

Versions to use

The forcings relevant for this simulation are the same as for the historical simulation with the addition of the SST and sea-ice forcing. For this additional forcing, we provide the version(s), in the form of "source ID(s)", which should be used when running this simulation. For all other forcings, please see the information on the historical simulation page.

{
    "amip-sea-surface-temperature-and-sea-ice-boundary-forcing": ["PCMDI-AMIP-1-1-10"]
}

Getting the data

The data is available on ESGF and searchable via metagrid, although this method of finding and downloading the data can involve a lot of clicking. Having said this, please also note: the aerosol optical properties based on the MACv2-SP parameterisation are not distrubuted via the ESGF.

Please see their specific guidance section for data access information.

If you install esgpull, you can download all the data associated with the source IDs above with the script shown below. Note that this will download all the data associated with these source IDs, which is likely to be much more data than you actually need to run your model.

#!/bin/bash

EXPERIMENT_NAME="historical"

esgpull add --track --tag ${EXPERIMENT_NAME} source_id:PCMDI-AMIP-1-1-10,CEDS-CMIP-2025-04-18,CEDS-CMIP-2025-04-18-supplemental,DRES-CMIP-BB4CMIP7-2-0,UofMD-landState-3-1-1,CR-CMIP-1-0-0,UOEXETER-CMIP-2-2-1,FZJ-CMIP-ozone-2-0,FZJ-CMIP-nitrogen-1-2,SOLARIS-HEPPA-CMIP-4-6,PIK-CMIP-1-0-1
esgpull update --tag ${EXPERIMENT_NAME} --yes
esgpull download --tag ${EXPERIMENT_NAME}