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pmip3:cmip6:design:6k:index [2015/03/24 22:17]
masa
pmip3:cmip6:design:6k:index [2016/06/20 17:34] (current)
jypeter Added link to experimental design on PMIP4 web site
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 ====== PMIP-CMIP6 Experimental Design Discussion: Mid-Holocene ====== ====== PMIP-CMIP6 Experimental Design Discussion: Mid-Holocene ======
 +
 +
 +<note warning>​The PMIP4 experimental design available on the PMIP3 wiki has been **superseded** by the experimental design detailed on the [[https://​pmip4.lsce.ipsl.fr/​doku.php/​exp_design|PMIP4 web site]]</​note>​
  
 <note tip>\\ Please submit your comments in the Discussion section at the end of this page</​note>​ <note tip>\\ Please submit your comments in the Discussion section at the end of this page</​note>​
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 The reference experiment to which the mid-Holocene is compared to is the pre-industrial control, which is part of the DECK. The reference experiment to which the mid-Holocene is compared to is the pre-industrial control, which is part of the DECK.
  
-For the mid-Holocene,​ our proposed experimental set-up for PMIP-CMIP6 is unchanged compared to the PMIP3-CMIP5 set-up:+For the **mid-Holocene**, our proposed experimental set-up for PMIP-CMIP6 is unchanged compared to the [[pmip3:​design:​6k:​final|PMIP3-CMIP5 set-up]]: 
 + 
 +===== Orbital parameters ===== 
 + 
 +The main forcing is the ** insolation **, and the astronomical parameters must be set to:
  
-The main forcing is the insolation, and the astronomical parameters must be set to: 
 **eccentricity** = 0.018682 ​ **eccentricity** = 0.018682 ​
 +
 **obliquity** = 24.105° ​ **obliquity** = 24.105° ​
 +
 **perihelion-180°** = 0.87° **perihelion-180°** = 0.87°
  
-**Concentration of atmospheric trace gases:** +**Date of vernal equinox** = March 21 at noon  
-CO2 = 280 ppm + 
-CH4 = 650 ppb +**solar constant** = same as in pre-industrial 
-N2O = 270 ppb + 
-CFC = 0 +===== Concentration of atmospheric trace gases ===== 
-O3 = same as in CMIP5 PI + 
 +**CO<​sub>​2</​sub>​** = 280 ppm 
 + 
 +**CH<​sub>​4</​sub>​** ​= 650 ppb 
 + 
 +**N<​sub>​2</​sub>​O** ​= 270 ppb 
 + 
 +**CFC** = 0 
 + 
 +**O<​sub>​3</​sub>​** ​= same as in CMIP5 PI  
 + 
 + 
 +===== Topography/​bathymetry/​coastlines ===== 
 + 
 +Unchanged compared to pre-industrial 
 + 
 +===== Vegetation and land surface ===== 
 + 
 +  * Computed using a dynamical vegetation module, 
 +  * or prescribed as in PI, with phenology computed for models with active carbon cycle 
 +  * or prescribed from data 
 + 
 +No change in ice sheet extent
  
  
 +===== Carbon cycle =====
  
 +Interactive,​ with atmospheric concentration prescribed and ocean and land carbon fluxes diagnosed as recommended in CMIP5
  
 +===== Dust cycle =====
  
 +We invite the modelling groups planning to run simulations with an interactive dust cycle to comment on the most appropriate methodology for their model, in particular as to their ability to use an interactive vegetation description.
  
  
pmip3/cmip6/design/6k/index.1427231866.txt.gz · Last modified: 2015/03/24 22:17 by masa