Impact of vegetation changes on climate during the Last Interglacial
Data files
Oct 23, 2025 version files 435.46 MB
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ESSENTIAL_OUTPUT.tar.gz
435.45 MB
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README.md
3.48 KB
Abstract
This dataset contains the climatology of ocean, atmospheric, and sea-ice outputs of the lig127k-GlbVeg experiment integrated using the ACCESS-ESM1.5, averaged from 200 model years of simulation. The lig127k-GlbVeg experiment is similar to the PMIP4 lig127k. Both are equilibrium experiments of the Last Interglacial (127,000 years ago) and follow the CMIP6-PMIP4 protocol. While lig127k has a global vegetation cover corresponding to the pre-industrial climate conditions, lig127k-GlbVeg uses vegetation maps generated by a vegetation model, LPJ-GUESS, based on the ACCESS-ESM1.5 Last Interglacial conditions.
Dataset DOI: 10.5061/dryad.bzkh189q4
Description of the data and file structure
The results presented in this study are based on simulations with the Australian Community Climate and Earth System Simulator (ACCESS-ESM1.5, Ziehn et al., 2020), which is a fully coupled atmosphere-land-ocean-sea-ice-carbon-cycle model.
The model was first integrated under Last Interglacial (LIG, 127,000 years ago, lig127k) boundary conditions following the PMIP4 protocol (Otto-Bliesner et al., 2017). The model is forced by appropriate orbital parameters and atmospheric greenhouse gas concentrations (Yeung et al., 2021). In this experiment, the vegetation cover is fixed to its pre-industrial distribution
The results of this experiment are then used to force the vegetation model, LPJ-GUESS, to obtain a vegetation distribution consistent with the simulated LIG climate.
An additional experiment (lig127k-GlbVeg) is integrated with the ACCESS-ESM1.5 forced with appropriate orbital parameters and atmospheric greenhouse gas concentrations, similar to the lig127k, but with the modified vegetation distribution.
This dataset includes outputs of the pre-industrial run (PI), the standard PMIP4 LIG 127k run (lig127k) and the LIG run with LIG vegetation distribution (lig127k-GlbVeg).
Files and variables
File: ESSENTIAL_OUTPUT.tar.gz
Description:
Experiments:
piControl: pre-industrial control
lig127k: Last interglacial 127ka PMIP4 equilibrium experiment with vegetation fixed at its pre-industrial (see Yeung et al., 2021)
lig127k-GlbVeg: Last interglacial 127ka equilibrium experiment with vegetation estimated by forcing the LPJ-GUESS with LIG climate (described in Yeung et al., 2025).
We here provide a subset of the outputs (ESSENTIAL), that include all necessary data to redo the analysis presented in the manuscript.
Sea-ice output: iceh.1474-1673ymonmean_ESSENTIAL.nc,
AICE: ice area (aggregate), fraction (1 = full sea-ice cover, 0=no sea-ice)
Atmospheric output: ligveg4.2.pa-1474-1673ymonmean_ESSENTIAL.nc
FLD_S00I024: SURFACE TEMPERATURE, degK
FLD_S00I031: FRAC OF SEA ICE IN SEA, fraction (1=sea-ice, 0=no sea-ice)
FLD_S01I201: NET DOWN SURFACE SW FLUX, W/m2
FLD_S01I210: CLEAR-SKY (II) DOWN SURFACE SW, W/m2
FLD_S01I211: CLEAR-SKY (II) UP SURFACE SW FL, W/m2
FLD_S02I201: NET DOWN SURFACE LW RAD FLUX, W/m2
FLD_S02I204: TOTAL CLOUD AMOUNT IN LW RADIAT, W/m2
FLD_S03I217: SURFACE SENSIBLE HEAT FLUX, W/m2
FLD_S03I225: 10 METRE WIND U-COMP, m/s
FLD_S03I226: 10 METRE WIND V-COMP, m/s
FLD_S03I227:10 METRE WIND SPEED ON B GRID , m/s
FLD_S03I234: SURFACE LATENT HEAT FLUX, W/m2
FLD_S03I317: SURFACE TILE FRACTIONS
FLD_S05I216: TOTAL PRECIPITATION RATE, kg/m2/s
FLD_S30I207 GEOPOTENTIAL HEIGHT ON P Levels, m
Ocean output: ocean_month_1474-1673ymonmeanESSENTIAL.nc,
SST: Sea surface temperature, degree Celsius
Code/software
Included files are netcdf that can be read with a multitude of softwares (Python, NOAA Ferret, Matlab...).
Access information
Other publicly accessible locations of the data:
- ACCESS-ESM1.5, pre-industrial run: https://doi.org/10.22033/ESGF/CMIP6.4248
- ACCESS-ESM1.5, lig127k run: https://doi.org/10.22033/ESGF/CMIP6.13703