Experiment ID

esm-flat10

Experiment Title

10 PgC/yr constant CO2 emissions experiment

Description

esm-flat10 is newly introduced for CMIP7 as an emissions-driven idealised experiment to quantify sensitivity of the earth system to CO2 emissions.
It requires fully-coupled AOGCM and BGC models with carbon cycle “emissions-driven”

The esm-flat10 experiment branches from a stable esm-piControl simulation, with a constant annual prescribed anthropogenic flux of carbon of 10PgC/year into the atmosphere, with globally homogenous emissions for initial (minimum) period, 0-150 years. Longer runs - 300 years – are recommended.

It serves as an emissions-driven experiment to diagnose the Transient Climate Response to cumulative Emissions (TCRE), which is the warming from pre-industrial levels observed after the emission of 1000PgC in a transient scenario.

Used with the partner experiments esm-flat10-zec and esm-flat10-cdr it forms a vital part of assessment of TCRE, ZEC and reversibility. In particular these experiments make assessment of ZEC easier than CMIP6 because: the experiment is emissions-driven from the outset and does not require a change in configuration at the branch point and the branch point is common across all models.

more details and analysis can be found here:
https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2127/
https://egusphere.copernicus.org/preprints/2024/egusphere-2024-3356/

MIP / Activity ID (registered)

C4MIP

MIP / Activity ID (unregistered)

No response

Parent Experiment

esm-piControl

Custom Parent Experiment

No response

Sub-experiment

none

Priority Tier

1

Source type codes for required model components

AOGCM, BGC

Source type codes for additional allowed model components

AER, CHEM, ISM

Start Date

none

Branch Date

at least 100 years into esm-piControl

(Minimum) Number of Years

150

Issue Type

experiment

Issue Kind

new