This is an old revision of the document!
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
Otto-Bliesner et al, in prep
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