Add/Modify: Experiment: amip-m4K

[alejandrobodas]

Experiment ID

amip-m4K

Experiment Title

AMIP experiment with uniform 4K SST decrease

Description

The configuration of the amip-m4K experiment will be the same as the Fast Track amip-p4K experiment, except that the sea surface temperatures are uniformly reduced by 4K rather than increased. This cooling should be applied to sea-ice-free grid boxes only. Sea ice and SSTs in grid boxes containing sea ice should remain the same as in the amip DECK experiment. In models which employ a fixed lower threshold near freezing for the SST used in the calculation of the surface fluxes, this should ideally also be reduced by 4K. This will support the investigation of inconsistent responses of clouds to a cooling versus a warming climate in a controlled way through comparison with the amip-p4K (Ringer et al., 2023). This experiment also complements the abrupt-0p5xCO2 experiment in that one can identify asymmetries in the warming/cooling response with and without interactions with the ocean.

Reference: Webb et al., 2017

MIP / Activity ID (registered)

CFMIP

MIP / Activity ID (unregistered)

No response

Parent Experiment

no-parent

Custom Parent Experiment

No response

Sub-experiment

none

Priority Tier

2

Source type codes for required model components

AGCM

Source type codes for additional allowed model components

AER, BGC, CHEM

Start Date

1979-01-01

Branch Date

No response

(Minimum) Number of Years

44

Issue Type

experiment

Issue Kind

new

[alejandrobodas]

Note
Not a Fast Track experiment, but adding it now in case some centres want to produce it on FT timescales.