pmip3:wg:degla:bc:core
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pmip3:wg:degla:bc:core [2015/10/21 08:17] ruza |
pmip3:wg:degla:bc:core [2015/10/21 13:26] (current) ruza |
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| To make sure we incorporate your comments in the final, published experiment design, please use GMD's [[http://www.geosci-model-dev-discuss.net/8/9045/2015/gmdd-8-9045-2015-discussion.html | discussion]] facility for the manuscript, which will stay open until 16th December 2015.\\ | To make sure we incorporate your comments in the final, published experiment design, please use GMD's [[http://www.geosci-model-dev-discuss.net/8/9045/2015/gmdd-8-9045-2015-discussion.html | discussion]] facility for the manuscript, which will stay open until 16th December 2015.\\ | ||
| - | The published version of the experiment design is/will be the definitive version and supersedes any differences on this wiki. | + | The published version of the experiment design is/will be the definitive version and supersedes any differences on this wiki. Data will be available to download from this wiki when the manuscript is accepted in its final state. |
| - | \\ | ||
| Please use the //Discussion// section below and our mailing list for __general__ discussion on the working group. | Please use the //Discussion// section below and our mailing list for __general__ discussion on the working group. | ||
| \\ | \\ | ||
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| - | ==== 21-9 ka ==== | + | ==== Transient simulation 21-9 ka ==== |
| - | All core simulations must span this time-period. Use: | + | All core simulations must span this time-period. Note that forcings provided will run 21-0 ka. \\ |
| + | Please use: | ||
| - | * A **spun-up LGM** climate simulation to initialise the simulation. OR a **transient 26-21 ka** simulation.\\ See below. | + | * An **equilibrium-type LGM** climate simulation to initialise the transient simulation, OR a **transient 26-21 ka LGM ** simulation. See below. |
| - | * **[[pmip3:wg:degla:bc:orb | Orbital parameters]]** as per [[http://www.sciencedirect.com/science/article/pii/027737919190033Q | Berger & Loutre (1991)]]<sup>[1]</sup>. | + | * **[[pmip3:wg:degla:bc:orb | Orbital parameters]]** as per [[http://journals.ametsoc.org/doi/abs/10.1175/1520-0469%281978%29035%3C2362%3ALTVODI%3E2.0.CO%3B2 | Berger (1978)]]<sup>[1]</sup>. |
| * **[[pmip3:wg:degla:bc:ghg | Greenhouse gases]]**: | * **[[pmip3:wg:degla:bc:ghg | Greenhouse gases]]**: | ||
| * **CO<sub>2</sub>** from EPICA Dome C [[http://www.nature.com/nature/journal/v453/n7193/full/nature06949.html | (Lüthi et al., 2008)]]<sup>[2]</sup> on the AICC2012 timescale [[http://www.clim-past.net/9/1733/2013/cp-9-1733-2013.html | (Veres et al., 2013)]]<sup>[3]</sup>. ((The high resolution [[http://www.nature.com/nature/journal/v514/n7524/full/nature13799.html | Marcott et al. (2014)]]<sup>[4]</sup> record could be used for an alternative simulation to the core, but not for the core.)) | * **CO<sub>2</sub>** from EPICA Dome C [[http://www.nature.com/nature/journal/v453/n7193/full/nature06949.html | (Lüthi et al., 2008)]]<sup>[2]</sup> on the AICC2012 timescale [[http://www.clim-past.net/9/1733/2013/cp-9-1733-2013.html | (Veres et al., 2013)]]<sup>[3]</sup>. ((The high resolution [[http://www.nature.com/nature/journal/v514/n7524/full/nature13799.html | Marcott et al. (2014)]]<sup>[4]</sup> record could be used for an alternative simulation to the core, but not for the core.)) | ||
| * **CH<sub>4</sub>** from EPICA Dome C [[http://www.nature.com/nature/journal/v453/n7193/full/nature06950.html | (Loulergue et al., 2008)]]<sup>[5]</sup> on the AICC2012 timescale [[http://www.clim-past.net/9/1733/2013/cp-9-1733-2013.html | (Veres et al., 2013)]]<sup>[3]</sup>. | * **CH<sub>4</sub>** from EPICA Dome C [[http://www.nature.com/nature/journal/v453/n7193/full/nature06950.html | (Loulergue et al., 2008)]]<sup>[5]</sup> on the AICC2012 timescale [[http://www.clim-past.net/9/1733/2013/cp-9-1733-2013.html | (Veres et al., 2013)]]<sup>[3]</sup>. | ||
| * **N<sub>2</sub>O** from TALDICE [[http://www.sciencedirect.com/science/article/pii/S0012821X10006023 | (Schilt et al., 2010)]]<sup>[6]</sup> on the AICC2012 timescale [[http://www.clim-past.net/9/1733/2013/cp-9-1733-2013.html | (Veres et al., 2013)]]<sup>[3]</sup>. | * **N<sub>2</sub>O** from TALDICE [[http://www.sciencedirect.com/science/article/pii/S0012821X10006023 | (Schilt et al., 2010)]]<sup>[6]</sup> on the AICC2012 timescale [[http://www.clim-past.net/9/1733/2013/cp-9-1733-2013.html | (Veres et al., 2013)]]<sup>[3]</sup>. | ||
| - | * **[[pmip3:wg:degla:bc:ice | Ice sheets]]**: Choice of either the [[pmip3:wg:degla:bc:ice#ice-6g_c_reconstruction | ICE-6G_C]]<sup>[7-8]</sup> or [[pmip3:wg:degla:bc:ice#lev_tarasov_s_reconstruction | Lev Tarasov's]]<sup>[9-12]</sup> global reconstruction of ice sheet evolution. \\ Whichever is chosen for the LGM should be kept for the whole simulation. \\ [See the [[pmip3:wg:degla:bc:ice | last deglaciation ice sheets]] page for more information on the ice sheets.] | + | * **[[pmip3:wg:degla:bc:ice | Ice sheets]]**: Choice of either the [[pmip3:wg:degla:bc:ice#ice-6g_c_reconstruction | ICE-6G_C]]<sup>[7-8]</sup> or [[pmip3:wg:degla:bc:ice#glac-1d | GLAC-1D]]<sup>[9-12]</sup> global reconstruction of ice sheet evolution. \\ Whichever is chosen for the LGM should be kept for the whole simulation. \\ [See the [[pmip3:wg:degla:bc:ice | last deglaciation ice sheets]] page for more information on the ice sheets.] |
| * **[[pmip3:wg:degla:bc:melt | Ice meltwater fluxes]]**: __no meltwater__ in the core. ((Global meltwater fluxes that are consistent with the ice sheet reconstructions will be provided for alternative simulations to the core, but must not be used for the core.)) | * **[[pmip3:wg:degla:bc:melt | Ice meltwater fluxes]]**: __no meltwater__ in the core. ((Global meltwater fluxes that are consistent with the ice sheet reconstructions will be provided for alternative simulations to the core, but must not be used for the core.)) | ||
| * Other boundary conditions: keep as per the LGM. For example : | * Other boundary conditions: keep as per the LGM. For example : | ||
| Line 51: | Line 51: | ||
| * Dust can be fixed (to pre-industrial) or prognostic \\ \\ | * Dust can be fixed (to pre-industrial) or prognostic \\ \\ | ||
| - | ==== 26-21 ka ==== | + | ==== Equilibrium-type LGM 21 ka ==== |
| - | For those who wish to begin their simulation from before the PMIP LGM, use: | + | In some cases, the following constraints may differ from other PMIP 21 ka experiments. If possible, please make sure you use the setup described here: |
| - | * Orbit as per [[http://www.sciencedirect.com/science/article/pii/027737919190033Q | Berger & Loutre (1991)]]<sup>[1]</sup> for this time period. | + | * Orbital parameters: |
| - | * All other boundary conditions as per the PMIP LGM Working Group. \\ \\ | + | * eccentricity: 0.018994 |
| + | * obliquity: 22.949° | ||
| + | * perihelion–180°: 114.42° | ||
| + | * vernal equinox: 21st March at noon | ||
| + | * Solar constant: same as for the preindustrial (e.g. 1365 W/m2) | ||
| + | * Trace gases: | ||
| + | * CO2: 188 ppm | ||
| + | * CH4: 375 ppb | ||
| + | * N2O: 200 ppb | ||
| + | * CFCs: 0 | ||
| + | * O3: same as PMIP3/CMIP5 preindustrial (e.g. 10 DU) | ||
| + | * Ice sheets: [[pmip3:wg:degla:bc:ice#ice-6g_c_reconstruction | ICE-6G_C]] or [[pmip3:wg:degla:bc:ice#glac-1d | GLAC-1D]] - use whichever you will use for the ensuing transient simulation | ||
| + | * Topography and coastlines: as per the chosen ice sheet. Please ensure that rivers reach the ocean. | ||
| + | * Bathymetry: Optional. If possible, as per the chosen ice sheet. Otherwise, up to the user to decide. | ||
| + | * Global ocean salinity: +1 psu | ||
| + | * Freshwater budget: Please note the PMIP LGM advice to try to avoid unnecessary ocean salinity drifts. You may need to route excess snow to the ocean. | ||
| + | * Other boundary conditions: consistent with the Core\\ \\ | ||
| + | |||
| + | ==== 26-21 ka LGM ==== | ||
| + | |||
| + | For those who wish to begin their simulation from before the PMIP LGM, use the following transient data: | ||
| + | * Orbit as per [[http://journals.ametsoc.org/doi/abs/10.1175/1520-0469%281978%29035%3C2362%3ALTVODI%3E2.0.CO%3B2 | Berger (1978)]]<sup>[1]</sup> for this time period. | ||
| + | * Greenhouse gases as per [[http://www.nature.com/nature/journal/v453/n7193/full/nature06949.html | Lüthi et al. (2008)]]<sup>[2]</sup>, [[http://www.nature.com/nature/journal/v453/n7193/full/nature06950.html | Loulergue et al. (2008)]]<sup>[5]</sup> and [[http://www.sciencedirect.com/science/article/pii/S0012821X10006023 | Schilt et al. (2010)]]<sup>[6]</sup>, respectively, on the AICC2012 chronology [[http://www.clim-past.net/9/1733/2013/cp-9-1733-2013.html | (Veres et al., 2013)]]<sup>[3]</sup>. | ||
| + | * All other boundary conditions as per the //Equilibrium-type LGM 21 ka//.\\ \\ | ||
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| ---- | ---- | ||
| ===== References ===== | ===== References ===== | ||
| - | - Berger, A. & Loutre, M. F. Insolation values for the climate of the last 10 million years. Quat. Sci. Rev. 10, 297–317 (1991). | + | - Berger, A. Long-Term Variations of Daily Insolation and Quaternary Climatic Changes. J. Atmospheric Sci. 35(12), 2362–2367 (1978). |
| - Lüthi, D. et al. High-resolution carbon dioxide concentration record 650,000–800,000 years before present. Nature 453, 379–382 (2008). | - Lüthi, D. et al. High-resolution carbon dioxide concentration record 650,000–800,000 years before present. Nature 453, 379–382 (2008). | ||
| - Veres, D. et al. The Antarctic ice core chronology (AICC2012): an optimized multi-parameter and multi-site dating approach for the last 120 thousand years. Clim Past 9, 1733–1748 (2013). | - Veres, D. et al. The Antarctic ice core chronology (AICC2012): an optimized multi-parameter and multi-site dating approach for the last 120 thousand years. Clim Past 9, 1733–1748 (2013). | ||
pmip3/wg/degla/bc/core.1445415477.txt.gz · Last modified: 2015/10/21 08:17 by ruza
