Add/Modify: Experiment: <10 PgC/yr constant CO2 emissions experiment>

[ChrisJones-MOHC]

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

0001-01-01

Branch Date

at least 100 years into esm-piControl

(Minimum) Number of Years

150 (but C4MIP strongly suggest and request at least 300)

Issue Type

experiment

Issue Kind

new