Design for the mid-Holocene run
You will find on this page information about the experiment design for the PMIP4 mid-Holocene 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:
| Pascale Braconnot | 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, B. L., Braconnot, P., Harrison, S. P., Lunt, D. J., Abe-Ouchi, A., Albani, S., Bartlein, P. J., Capron, E., Carlson, A. E., Dutton, A., Fischer, H., Goelzer, H., Govin, A., Haywood, A., Joos, F., LeGrande, A. N., Lipscomb, W. H., Lohmann, G., Mahowald, N., Nehrbass-Ahles, C., Pausata, F. S. R., Peterschmitt, J.-Y., Phipps, S. J., Renssen, H., and Zhang, Q., Geosci. Model Dev., 10, 3979-4003, doi:10.5194/gmd-10-3979-2017, 2017.
Supplement (Otto-Bliesner et al, GMD, 2017)
Specifications
| PMIP4-CMIP6 specifications | |
|---|---|
| PMIP4-CMIP6 name | midHolocene |
| Astronomical parameters | eccentricity = 0.018682 obliquity = 24.105° perihelion-180° = 0.87° Date of vernal equinox : March 21 at noon |
| Trace gases | CO2 = 264.4 ppm CH4 = 597 ppb N2O = 262 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 mid-Holocene 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 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