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pmip3:cmip6:design:6k:index [2015/03/24 21:17] masa |
pmip3:cmip6:design:6k:index [2015/03/24 21:21] masa |
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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: | ||
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**eccentricity** = 0.018682 | **eccentricity** = 0.018682 | ||
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**obliquity** = 24.105° | **obliquity** = 24.105° | ||
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**perihelion-180°** = 0.87° | **perihelion-180°** = 0.87° | ||
**Concentration of atmospheric trace gases:** | **Concentration of atmospheric trace gases:** | ||
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CO2 = 280 ppm | CO2 = 280 ppm | ||
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CH4 = 650 ppb | CH4 = 650 ppb | ||
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N2O = 270 ppb | N2O = 270 ppb | ||
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CFC = 0 | CFC = 0 | ||
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O3 = same as in CMIP5 PI | O3 = same as in CMIP5 PI | ||
+ | ** Topography/bathymetry/coastlines **: unchanged compared to pre-industrial | ||
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+ | ** Vegetation and land surface:** | ||
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+ | Computed using a dynamical vegetation module, | ||
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+ | Or prescribed as in PI, with phenology computed for models with active carbon cycle or prescribed from data | ||
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+ | No change in ice sheet extent | ||
+ | ** Carbon cycle ** | ||
+ | Interactive, with atmospheric concentration prescribed and ocean and land carbon fluxes diagnosed as recommended in CMIP5 | ||