pmip3:wg:degla:bc:core
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pmip3:wg:degla:bc:core [2015/02/17 10:55] ruza |
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| More info here: http://wiki.splitbrain.org/plugin:discussion */ | More info here: http://wiki.splitbrain.org/plugin:discussion */ | ||
| - | /* ~~DISCUSSION|Discussion on core experiment design~~ * | + | ~~DISCUSSION|General discussion on core experiment design~~ |
| ====== Last Deglaciation Core Experiment Design ====== | ====== Last Deglaciation Core Experiment Design ====== | ||
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| [[pmip3:wg:degla:index|Go back]] to the main working group page. \\ | [[pmip3:wg:degla:index|Go back]] to the main working group page. \\ | ||
| - | Please note this page is a work in progress and is not ready for discussion yet. | ||
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| ===== Proposal ===== | ===== Proposal ===== | ||
| - | Following wide consultation over the past year, this is our first-draft proposal for the last deglaciation core simulation. Please use the 'Discussion' section below to comment on the proposal and make suggestions for ammendments. \\ \\ | + | Following wide consultation over the past year, this is our first-draft proposal for the last deglaciation core simulation. \\ |
| + | Please use the //Discussion// section below to comment on __general__ aspects of the proposal and make suggestions for amendments. \\ | ||
| + | \\ | ||
| + | For comments on specific boundary conditions, please use the //Discussion// sections on their dedicated pages: | ||
| + | * [[pmip3:wg:degla:bc:orb | orbital parameters]] page | ||
| + | * [[pmip3:wg:degla:bc:ghg | greenhouse gases]] page | ||
| + | * [[pmip3:wg:degla:bc:ice | ice sheets]] page | ||
| + | * [[pmip3:wg:degla:bc:melt | ice meltwater fluxes]] [to the ocean] page \\ \\ | ||
| + | |||
| ==== 21-9 ka ==== | ==== 21-9 ka ==== | ||
| Line 25: | Line 33: | ||
| * A **spun-up LGM** climate simulation to initialise the simulation.\\ This should have been set up as per the Last Glacial Maximum (LGM) working group requirements and recommendations. | * A **spun-up LGM** climate simulation to initialise the simulation.\\ This should have been set up as per the Last Glacial Maximum (LGM) working group requirements and recommendations. | ||
| - | * **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://www.sciencedirect.com/science/article/pii/027737919190033Q | Berger & Loutre (1991)]]<sup>[1]</sup>. |
| - | * **Greenhouse gases** from [[http://www.nature.com/nature/journal/v453/n7193/full/nature06949.html | Lüthi et al. (2008)]]<sup>[2]</sup> and [[http://www.nature.com/nature/journal/v453/n7193/full/nature06950.html | Loulergue et al. (2008)]]<sup>[3]</sup> on the timescale of [[http://www.clim-past.net/9/1733/2013/cp-9-1733-2013.html | Veres et al. (2013)]]<sup>[4]</sup>. ((The high resolution [[http://www.nature.com/nature/journal/v514/n7524/full/nature13799.html | Marcott et al. (2014)]]<sup>[5]</sup> record could be used for an alternative simulation to the core, but not for the core.)) | + | * **[[pmip3:wg:degla:bc:ghg | Greenhouse gases]]**: |
| - | * Choice of either ICE6G_C<sup>[6-7]</sup> or Lev Tarasov's global reconstruction of **ice sheet** evolution. \\ Whichever is chosen for the LGM should be kept for the whole simulation. \\ [See the [[last deglaciation ice sheets]] page for more information on the reconstructions.] | + | * **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.)) |
| - | * Meltwater: **__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.)) \\ \\ | + | * **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>. | ||
| + | * **[[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: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 : | ||
| + | * Vegetation can be fixed (to pre-industrial) or interactive | ||
| + | * Dust can be fixed (to pre-industrial) or prognostic \\ \\ | ||
| ==== 26-21 ka ==== | ==== 26-21 ka ==== | ||
| Line 37: | Line 51: | ||
| ---- | ---- | ||
| - | ===== Some points to discuss ===== | + | ===== Points to discuss ===== |
| Please think about the following points and add any comments on these or any other aspects of the experiment design to the discussion section below: [Topics will be added here as they are raised below or by email.] | Please think about the following points and add any comments on these or any other aspects of the experiment design to the discussion section below: [Topics will be added here as they are raised below or by email.] | ||
| - | * Should the core experiment use the [[http://www.nature.com/nature/journal/v514/n7524/full/nature13799.html | Marcott et al. (2014)]]<sup>[5]</sup> CO<sub>2</sub> and CH<sub>4</sub> records? \\ For example, these newer data are higher resolution than [[http://www.nature.com/nature/journal/v453/n7193/full/nature06949.html | Lüthi et al. (2008)]]<sup>[2]</sup> and [[http://www.nature.com/nature/journal/v453/n7193/full/nature06950.html | Loulergue et al. (2008)]]<sup>[3]</sup>, but do not include N<sub>2</sub>O and are restricted to 23-9 ka. Therefore more consistency may be be gained from using the older [[http://www.nature.com/nature/journal/v453/n7193/full/nature06949.html | Lüthi et al. (2008)]]<sup>[2]</sup> and [[http://www.nature.com/nature/journal/v453/n7193/full/nature06950.html | Loulergue et al. (2008)]]<sup>[3]</sup> greenhouse gas records. \\ \\ | + | * No specific points yet. \\ \\ |
| ---- | ---- | ||
| - | ====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. & Loutre, M. F. Insolation values for the climate of the last 10 million years. Quat. Sci. Rev. 10, 297–317 (1991). | ||
| - 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). | ||
| - | - Loulergue, L. et al. Orbital and millennial-scale features of atmospheric CH4 over the past 800,000 years. Nature 453, 383–386 (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). | ||
| - Marcott, S. A. et al. Centennial-scale changes in the global carbon cycle during the last deglaciation. Nature 514, 616–619 (2014). | - Marcott, S. A. et al. Centennial-scale changes in the global carbon cycle during the last deglaciation. Nature 514, 616–619 (2014). | ||
| + | - Loulergue, L. et al. Orbital and millennial-scale features of atmospheric CH4 over the past 800,000 years. Nature 453, 383–386 (2008). | ||
| + | - Schilt, A. et al. Atmospheric nitrous oxide during the last 140,000 years. Earth Planet. Sci. Lett. 300, 33–43 (2010). | ||
| - Argus, D. F., Peltier, W. R., Drummond, R. & Moore, A. W. The Antarctica component of postglacial rebound model ICE-6G_C (VM5a) based on GPS positioning, exposure age dating of ice thicknesses, and relative sea level histories. Geophys. J. Int. ggu140 (2014). | - Argus, D. F., Peltier, W. R., Drummond, R. & Moore, A. W. The Antarctica component of postglacial rebound model ICE-6G_C (VM5a) based on GPS positioning, exposure age dating of ice thicknesses, and relative sea level histories. Geophys. J. Int. ggu140 (2014). | ||
| - | - Peltier, W. R., Argus, D. F. & Drummond, R. Space geodesy constrains ice age terminal deglaciation: The global ICE-6G_C (VM5a) model. J. Geophys. Res. Solid Earth 2014JB011176 (2015). \\ \\ | + | - Peltier, W. R., Argus, D. F. & Drummond, R. Space geodesy constrains ice age terminal deglaciation: The global ICE-6G_C (VM5a) model. J. Geophys. Res. Solid Earth 2014JB011176 (2015). |
| + | - Tarasov, L. & Peltier, W. R. Greenland glacial history and local geodynamic consequences. Geophys. J. Int. 150, 198–229 (2002). | ||
| + | - Tarasov, L., Dyke, A. S., Neal, R. M. & Peltier, W. R. A data-calibrated distribution of deglacial chronologies for the North American ice complex from glaciological modeling. Earth Planet. Sci. Lett. 315–316, 30–40 (2012) | ||
| + | - Briggs, R. D., Pollard, D. & Tarasov, L. A data-constrained large ensemble analysis of Antarctic evolution since the Eemian. Quat. Sci. Rev. 103, 91–115 (2014). | ||
| + | - Tarasov et al. Eurasian ice sheet evolution (in prep.).\\ \\ | ||
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pmip3/wg/degla/bc/core.txt · Last modified: 2015/10/21 13:26 by ruza
