Data from the CESM v1.0.4 model for evaluation of quasi-equilibrium criteria in coupled climate model simulations

Srinath Krishnan, Agatha M. de Boer, Natalie Burls

This dataset contains simulation output run with CESM v1.0.4 for 5000+ year simulations run with 2x, 4x, 8x, and 16xCO₂. The data contains several output variables; meridional overturning circulation, surface atmospheric temperature, sea-surface temperature, deep water temperature, ideal age, top of the atmosphere radiative fluxes, and precipitation variables to calculate the ITCZ.

This supports the investigation of how the commonly used criteria performs for validating that a coupled climate model is in quasi-equilibrium. The dataset consists of model output for five different simulations that span a range of CO₂ levels, thus providing different pathways to quasi-equilibrium.

The criteria include both ocean and atmospheric variables (and so does the dataset) and global and regional values. Annual means are calculated for the length of the simulation (5000+ year simulations). Most variables are 3-D variables set on a time, latitude, and longitude axis. The meridional overturning circulation (MOC) variable has additional dimensions of the MOC region, MOC component (and no longitude).

AtmosphereModel simulationsCoupled climate modelsOceansQuasi-equilibrium criteria

Name

Version

Citation

References

Shields CA, Bailey DA, Danabasoglu G, Jochum M, Kiehl JT, Levis S, Park S (2012) The Low-Resolution CCSM4. Journal of Climate 25:3993–4014. https://doi.org/10.1175/jcli-d-11-00260.1

Data description

The dataset has output variables from five different simulations with CESM v1.0.4 (Shields et al. 2012) (provided in five folders) with the variables of interest being plotted for 5000+ years (the exact number of years vary slightly between the simulations).

Data are provided as NetCDF files. Total size: 7.5 GB.

Variables

• MOC (meridional ocean circulation)
• SAT (surface temperature)
• SST (sea-surface temperature)
• DEEP T (deep water temperature)
• IAGE (ideal age of the water)
• TOA (top-of-the-atmosphere radiative fluxes)
• E/P (evaporation/precipitation variables)

Files

The folder and file names are as follows

• abrupt2xCO2

  • MOC abrupt2xCO2_T31_gx3v7_cheyenne.pop.h.0001-5027.anmn.MOC.nc
  • SAT abrupt2xCO2_T31_gx3v7_cheyenne.cam2.h0.0001-5027.anmn.VARS.GlobMean.nc
  • SST, DEEP T, IAGE abrupt2xCO2_T31_gx3v7_cheyenne.pop.h.0001-5027.anmn.VARS.remap.mean.nc
  • TOA abrupt2xCO2_T31_gx3v7.cam2.h0.0001-5027.TOAFlux_FSNTFLNT.anmn.nc
  • E/P abrupt2xCO2_T31_gx3v7_cheyenne.cam2.h0.0001-5027.anmn.VARS.nc

• abrupt4xCO2

  • MOC abrupt4xCO2_T31_gx3v7_cheyenne.pop.h.0001-5490.anmn.MOC.nc
  • SAT abrupt4xCO2_T31_gx3v7_cheyenne.cam2.h0.0001-5490.anmn.TS.GlobMean.nc
  • SST, DEEP T, IAGE abrupt4xCO2_T31_gx3v7_cheyenne.pop.h.0001-5490.anmn.Vars.remap.mean.nc
  • TOA abrupt4xCO2_T31_gx3v7.cam2.h0.0001-5407.TOAflux_FSNTFLNT.anmn.nc
  • E/P abrupt4xCO2_T31_gx3v7_cheyenne.cam2.h0.0001-5490.anmn.EP.nc

• abrupt8xCO2

  • MOC abrupt8xCO2_T31_gx3v7_cheyenne.pop.h.0001-5470.anmn.MOC.nc
  • SAT abrupt8xCO2_T31_gx3v7_cheyenne.cam2.h0.0001-5490.anmn.TS.GlobMean.nc
  • SST, DEEP T, IAGE abrupt8xCO2_T31_gx3v7_cheyenne.pop.h.0001-5470.anmn.Vars.remap.mean.nc
  • TOA abrupt8xCO2_T31_gx3v7.cam2.h0.0001-5470.TOAFlux_FSNTFLNT.anmn.nc
  • E/P abrupt8xCO2_T31_gx3v7_cheyenne.cam2.h0.0001-5470.anmn.EP.nc

• abrupt16xCO2

  • MOC abrupt16xCO2_T31_gx3v7.pop.h.0001-5440.anmn.MOC.nc
  • SAT abrupt16xCO2_T31_gx3v7.cam2.h0.0001-5374.anmn.TS.GlobMean.nc
  • SST, DEEP T, IAGE abrupt16xCO2_T31_gx3v7.pop.h.0001-5440.anmn.Vars.remap.mean.nc
  • TOA abrupt16xCO2_T31_gx3v7.cam2.h0.0001-5374.TOAflux_FSNTFLNT.anmn.nc
  • E/P abrupt16xCO2_T31_gx3v7.cam2.h0.0001-5374.anmn.EP.nc

• Preind

  • SAT PreInd_T31_gx3v7.cam2.h0.0001-3000.anmn.TS.mean.nc
  • TOA PreInd_T31_gx3v7.cam2.h0.0001-3000.TOAFlux_FSNTFLNT.anmn.nc
  • MOC PreInd_T31_gx3v7.pop.h.0001-3800.anmn.MOC.AUG25.nc
  • SST, DEEP T, IAGE PreInd_T31_gx3v7.pop.h.0001-3800.anmn.Vars.remap.mean.nc

Comments

The dataset was developed in support of a GRL submission (Evaluation of Quasi-equilibrium Criteria for Coupled Climate Model Simulations, [Paper # 2025GL117040]).

Project

Agatha de Boer - VR 2020-04791 Natalie Burls - NSF AGS-1844380; NSF OCN-2402414 David K Hutchinson - Australian Research Council grant DE220100279 Data storage and computation: NAISS partially funded by Swedish Research Council Grant Agreement no. 2022-06725

Publisher

Bolin Centre Database

License

Open Data Commons Attribution License (ODC-By) v1.0

First name

Srinath

Last name or organisation

Krishnan

Email address

srinath.krishnan@cicero.oslo.no

Address

CICERO; Gaustadalléen 21

Postal code

0349

City

Oslo

Country

Norway

GCMD science keyword

Earth science services > Models > Coupled climate models

GCMD location

Geographic Region > Global

DOI

Time