scen7-vl Experiment Setup and Forcings Guidance

PLACEHOLDER TBC. CMIP7 ScenarioMIP very low emissions future. Run with prescribed carbon dioxide concentrations (for prescribed carbon dioxide emissions, see esm-scen7-vl).

Experiment set up

The CMIP7 very low scenario 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 2022-01-01 and end on 2100-12-31. Only one ensemble member is required.

Parent experiment

scen7-vl branches from the historical simulation (part of CMIP).

Branch from historical at 2022-01-01.

Forcings

Versions to use

The forcings relevant for this simulation are listed below. For each forcing, we provide the version(s), in the form of "source ID(s)", which should be used when running this simulation.

{
    "anthropogenic-emissions": ["IIASA-IAMC-vl-1-0-0"],
    "biomass-burning-emissions": ["IIASA-IAMC-vl-1-0-0"],
    "land-use": "not-available-yet",
    "greenhouse-gas-concentrations": ["CR-vl-1-0-0"],
    "stratospheric-aerosol-forcing ": ["UOEXETER-ScenarioMIP-2-2-2"],
    "ozone": "not-available-yet",
    "nitrogen-deposition": "not-available-yet",
    "solar": ["SOLARIS-HEPPA-ScenarioMIP-4-6"],
    "aerosol-optical-properties": null,
    "population-density": ["PIK-vl-1-0-0"]
}

Notes

The following pages give further information on each forcing:

Beyond the information on these pages, please also note the following:

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.

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.

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="scen7-vl"

esgpull add --track --tag ${EXPERIMENT_NAME} source_id:IIASA-IAMC-vl-1-0-0,IIASA-IAMC-vl-1-0-0,CR-vl-1-0-0,UOEXETER-ScenarioMIP-2-2-2,SOLARIS-HEPPA-ScenarioMIP-4-6,PIK-vl-1-0-0
esgpull update --tag ${EXPERIMENT_NAME} --yes
esgpull download --tag ${EXPERIMENT_NAME}