LongRunMIP is an ongoing model intercomparison to study century and millennia time scales of atmosphere-ocean general circulation model (AOGCM) equilibration and the linearity assumptions around feedback analysis. As an ensemble of opportunity, there is no previously agreed upon protocol and the only condition to participate is a coupled model simulation of any stabilizing scenario simulating more than 1,000 years. LongRunMIP currently contains fifty simulations of fifteen different models originating from ten modelling centers, each between 1,000 and 6,000 years long.

Temperature response to CO2 in the atmosphere and ocean for two representative models. Visualization by Tarun Chadha of SIS/C2SM, ETH Zurich. More animations can be found here.

Simulations

Model Simulation Length Atm. resolution Ocean resolution Control sim. (years)
CCSM3abrupt2x300048x96100x116x251530
abrupt4x2120
abrupt8x1450
CCSM3IIabrupt2.4x370148x96100x116x253805
abrupt4.8x3132
lin2.4x3990
CESM 1.0.4abrupt2x250096x144384x20x601320
abrupt4x5000
abrupt8x2300
CNRM-CM6-1abrupt4x1000128x256180x360x75500
EC-EARTH-PISMhist+RCP8.5+1270160x320292x362x42508
ECHAM5/MPI-OMabrupt4x100048x96101x120x40100
1pct4x6080
FAMOUSabrupt2x300037x4873x96x203000
abrupt4x3000
GFDL-CM31pct2x500090x144200x360x505200
GFDL-ESM2M1pct2x450090x144200x360x501340
GISS-E2-Rabrupt4x500090x144180x288x325225
1pct4x5000
HadCM3Labrupt2x100073x9673x96x201000
abrupt4x1000
abrupt8x1000
abrupt16x1000
HadGEM2-ESabrupt4x1299145x192216x360x40239
IPSL-CM5A-LRabrupt4x100096x96149x82x311000
MIROC3.21pct2x200064x128192x256x44681
1pct4x2000
MPIESM-1.1abrupt4x445996x192220x256x402000
MPIESM-1.2abrupt2x100096x192220x256x401237
abrupt4x1000
abrupt8x1000
abrupt16x1000

Variables

Atmosphere

hflsSurface upward latent heat flux
hfssSurface upward sensible heat flux
prPrecipitation (on atmospheric grid)
pslSea level pressure
rldsSurface downwelling longwave radiation
rlusSurface upwelling longwave radiation
rlutTOA outgoing longwave radiation
rlutcsTOA outgoing clear-sky longwave radiation
rsdsSurface downwelling shortwave radiation
rsdtTOA incident shortwave radiation
rsusSurface upwelling shortwave radiation
rsutTOA outgoing shortwave radiation
rsutcsTOA outgoing clear-sky shortwave radiation
tasNear-surface air temperature
tsAtmospheric surface temperature
netTOANet TOA flux
netSURFNet surface flux

Ocean

sicSea ice area fraction, monthly
moc/msftmyzMeridional overturning circulation
surfNet ocean heat uptake, annual
tosSea surface temperature, annual
sosSea surface salinity, annual
wfoNet water flux into sea water
evsWater evaporation
pr_ocnPrecipitation (on ocean grid)
tauuoSurface downward wind stress in x dirction
tauvoSurface downward wind stress in y dirction
soSea water salinity, 3D full time series, annual
thetaoSea water potential temperature, 3D full time series, annual
agesscIdeal age, time since surface contact 3D full time series, annual
thetaoFebSea water potential temperature, 3D full time series, February
thetaoSepSea water potential temperature, 3D full time series, September
soFebSea water salinity, 3D full time series, February
soSepSea water salinity, 3D full time series, September

Access

Early access to data is currently available to LongRunMIP contributors at https://data.iac.ethz.ch/longrunmip.

Contact & Access

LongRunMIP is organized by

and has contributions from Ayako Abe-Ouchi (MIROC), Timothy Andrews (HadGEM2), Long Cao (HadCM3L), Gokhan Danabasoglu (CCSM3), Jean-Louis Dufresne (IPSL), Thomas Frölicher (GFDL-ESM2M), Olivier Geoffroy (CNRM),Jonathan Gregory (FAMOUS), Chao Li (ECHAM5/MPIOM, MPI-ESM-1.1), Thorsten Mauritsen (MPI-ESM-1.2), Elisabeth Moyer (CCSM3), David Paynter (GFDL-CM3), Maria Rugenstein (CESM104), Gavin A. Schmidt (GISSE2R), and Shuting Yang (EC-EARTH-PISM).

We are still accepting contributions, so please get in contact if you want to participate.