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 a true ensemble of opportunity, there is no protocol and the only condition to participate is a coupled model simulation of any stabilizing scenario simulating more than 1,000 years. As of December 2016, LongRunMIP contains thirty-eight scenario simulations of fourteen different models originating from nine modelling centers, each between 1,000 and 6,000 years long.

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

Contact

If you have any questions or comments, please reach out to the organizers:

We also wish to acknowledge the researchers who created these long runs, including:

Chao Li, Thorsten Mauritsen, Gokhan Danabasoglu, Alexandra Jonko, Maria Rugenstein, Long Cao, Jonathan Gregory, Timothy Andrews, Thomas Froelicher, David Paynter, Jean-Louis Dufresne, Gavin Schmidt, Ayako Abe-Ouchi, and Shuting Yang