pmip3:cmip6:design:21k:index
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pmip3:cmip6:design:21k:index [2015/03/24 21:51] masa |
pmip3:cmip6:design:21k:index [2015/03/27 11:19] jypeter Started cosmetic changes |
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| - | ~~DISCUSSION~~ | ||
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| - | ====== PMIP-CMIP6 Experimental Design Discussion: Last Glacial Maximum ====== | ||
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| - | <note tip>\\ Please submit your comments in the Discussion section at the end of this page</note> | ||
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| ~~DISCUSSION~~ | ~~DISCUSSION~~ | ||
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| The reference experiment to which the lgm is compared to is the pre-industrial control, which is part of the DECK. | The reference experiment to which the lgm is compared to is the pre-industrial control, which is part of the DECK. | ||
| - | The lgm experimental set-up foreseen for PMIP-CMIP5 is as follows (cf. PMIP3 web site, with some modifications): | + | For the **LGM**, our proposed experimental set-up for PMIP-CMIP6 is based on the [[pmip3:design:21k:final|PMIP3-CMIP5 set-up]]: |
| - | **Insolation** (quite similar to pre-industrial) | + | ===== Orbital parameters ===== |
| - | eccentricity = 0.018994 | + | **eccentricity** = 0.018994 |
| - | obliquity = 22.949° | + | **obliquity** = 22.949° |
| - | perihelion-180° = 114.42° | + | **perihelion-180°** = 114.42° |
| - | solar constant: same as PI | + | **Date of vernal equinox** = March 21 at noon |
| - | **Concentration of atmospheric trace gases:** | + | **solar constant** = same as PI |
| - | CO2 = 185 ppm | + | **Concentration of atmospheric trace gases** |
| - | CH4 = 350 ppb | + | **CO<sub>2</sub>** = 185 ppm |
| - | N2O = 200 ppb | + | **CH<sub>4</sub>** = 350 ppb |
| - | CFC = 0 | + | **N<sub>2</sub>O** = 200 ppb |
| - | O3 = same as in CMIP5 PI | + | **CFC** = 0 |
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| + | O<sub>3</sub> = same as in CMIP5 PI | ||
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| 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 a interactive vegetation description. | 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 a interactive vegetation description. | ||
| - | ** A note | + | ** A note on the fresh water budget ** |
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| + | Modelling groups are advised to carefully check the fresh water budget in their lgm experiments in order to avoid unnecessary drifts of the ocean salinity. It can be necessary to route the snow which has fallen in excess on the ice sheets to the ocean. Given the change in coastlines, it is also sometimes necessary relocate the large rivers' estuaries on the coast. | ||
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| + | ** Glocal ocean salinity ** | ||
| + | Add 1PSU | ||
pmip3/cmip6/design/21k/index.txt · Last modified: 2016/06/20 15:34 by jypeter
