Last Deglaciation Core Experiment Design

Contacts: Ruža Ivanović, Lauren Gregoire, Didier Roche

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Please note this page is a work in progress and not ready for discussion yet.

Proposal

Following wide consultation over the past year, the following 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.

21-9 ka

All core simulations must span this time-period. Use:

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 Berger & Loutre (1991).

Greenhouse gases from Lüthi et al. (2008) and Loulergue et al. (2008) on the timescale of Veres et al. (2013). 1) The high resolution Marcott et al. (2014) record could be used for an alternative simulation to the core, but not for the core.

Choice of either ICE6G_C and or Lev Tarasov's global reconstruction of ice sheet evolution.
Whichever is chosen for the LGM should be kept for the whole simulation.

Meltwater: no meltwater in the core. 2) 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.

26-21 ka

For those who wish to begin their simulation from before the PMIP LGM, use:

Orbit as per Berger & Loutre (1991) for this time period.

Boundary conditions as per the PMIP LGM Working Group.

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