Design for the last Interglacial (at 127 ky BP) run

You will find on this page information about the experiment design for the PMIP4 last Interglacial (at 127 ky BP) experiment.

Please make sure to read the Associated publication before setting up your experiments or using the output data, and read any how-to sections associated with specific boundary conditions.

Get in touch with the following people if you have questions:

Bette Otto-Bliesner Scientific questions
Jean-Yves Peterschmitt Technical questions or missing data

Associated publication

The PMIP4 contribution to CMIP6 – Part 2: Two Interglacials, Scientific Objective and Experimental Design for Holocene and Last Interglacial Simulations, Otto-Bliesner et al, GMD, under review doi:10.5194/gmd-2016-279

Specifications

PMIP4-CMIP6 specifications
PMIP4-CMIP6 name lig127k
Astronomical parameters eccentricity = 0.039378
obliquity = 24.04°
perihelion-180° = 275.41°
Date of vernal equinox : March 21 at noon
Trace gases CO2 = 275 ppm
CH4 = 685 ppb
N2O = 255 ppb
CFC = 0
O3 = same as in CMIP6 piControl
Solar activity Same as in CMIP6 piControl (TSI = 1360.747 W.m-2)
Ice sheets Same as in CMIP6 piControl
Topography and coastlines Same as in CMIP6 piControl
Volcanic activity Same as in CMIP6 piControl
Aerosols Modified sources, atmospheric concentrations or radiative forcing, depending on model complexity and model configuration used for DECK and historical experiments
cf. documenting papers: Otto-Bliesner et al, in prep and Kageyama et al, subm.
Access to data
Vegetation Depending on model complexity and model configuration used for DECK and historical experiments:
Interactive vegetation or Interactive carbon cycle (LAI) or Prescribed to present-day values or lig127k values computed from off-line vegetation model
The methodology to represent vegetation should be the same as for the CMIP6 piControl simulation
cf. documenting papers: Otto-Bliesner et al, in prep and Kageyama et al, subm.

Collaboration

  • The PMIP4-CMIP6 lig127k simulation is being coordinated with ISMIP6. The output from the lig127k simulation will be used by ISMIP6 to force standalone ice sheet experiments (lastInterglacialforcedism). This will increase our understanding of the sensitivity of the ice sheets, complementing the suite of standalone ISMIP6 ice sheet experiments.
  • The PMIP4-CMIP6 midHolocene and lig127k simulations are also expected to be relevant to analyses in SIMIP’s assessment of the role of sea-ice changes in climate changes and AerChemMIP’s assessment of the role of dust

Sensitivity experiments

Sensitivity to Prescribed Vegetation

Sensitivity to Prescribed Ice Sheets

Simulation to explore the effects of the H11 event