DOI: 10.5061/dryad.bzkh189q4
title: Impact of vegetation changes on climate during the Last Interglacial

description: 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.
description: # Impact of vegetation changes on climate during the Last Interglacial
 Dataset DOI:
 [10.5061/dryad.bzkh189q4](https://doi.org/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.1474-1673*ymonmean*_ESSENTIAL.nc, AICE: ice area (aggregate),
 fraction (1 = full sea-ice cover, 0=no sea-ice) **Atmospheric output:**
 lig*veg4.2.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_1474-1673*ymonmean*ESSENTIAL.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](https://doi.org/10.22033/ESGF/CMIP6.4248) * ACCESS-ESM1.5, lig127k run: [https://doi.org/10.22033/ESGF/CMIP6.13703](https://doi.org/10.22033/ESGF/CMIP6.13703)