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pmip3:design:li:index [2010/07/20 08:50] lunt |
pmip3:design:li:index [2010/09/16 12:33] jypeter Added link to final BC page in the top warning |
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~~ODT~~ | ~~ODT~~ | ||
- | ~~DISCUSSION~~ | + | ~~DISCUSSION:closed~~ |
<html><a name="page_top_tag"> </a></html> | <html><a name="page_top_tag"> </a></html> | ||
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====== Last Interglacial Experimental Design ====== | ====== Last Interglacial Experimental Design ====== | ||
- | <note warning>**Page in progress**: this is not the final version!\\ \\ Use the [[index#page_bottom_tag|discussion]] panel at the end of the page for comments </note> | + | <note warning>This was a BC //development page// (see [[index#page_bottom_tag|discussion]] panel at the end of the page)\\ \\ Make sure you use the [[pmip3:design:li:final|final version of the LI BC]]!</note> |
===== Goal ===== | ===== Goal ===== | ||
- | Run **early Eemian**, **mid-Eemian** and **glacial inception** snap shots. This will allow us to model the response to obliquity maximum (//130ka//) and minimum (//115ka//), and near precession optimum for ITCZ shift, ENSO and tropical monsoons (//125ka//) | + | Run **early Eemian**, **mid-Eemian** and **glacial inception** snap shots. This will allow us to model the high latitude response to obliquity maximum (//130ka//) and minimum (//115ka//), and near precession optimum for ITCZ shift, ENSO and tropical monsoons (//125ka//) |
==== Core experiments ==== | ==== Core experiments ==== | ||
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* transient interglacial simulations: 130-125ka (or 130-115ka). Either low resolution model or GCM with accelerated boundary conditions, using transient orbit and trace gases (contact Dan Lunt if interested). | * transient interglacial simulations: 130-125ka (or 130-115ka). Either low resolution model or GCM with accelerated boundary conditions, using transient orbit and trace gases (contact Dan Lunt if interested). | ||
* transient holocene simulations: 8-2ka (or 8-0ka). Either low resolution model or GCM with accelerated boundary conditions, using transient orbit and trace gases (contact Dan Lunt if interested). | * transient holocene simulations: 8-2ka (or 8-0ka). Either low resolution model or GCM with accelerated boundary conditions, using transient orbit and trace gases (contact Dan Lunt if interested). | ||
+ | * transient and snapshot simulations with variable solar forcing (contact Hans Renssen and/or Steven Phipps if interested) | ||
===== Boundary conditions ===== | ===== Boundary conditions ===== | ||
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^ ^ PMIP3 ^ Alternative solution ^ | ^ ^ PMIP3 ^ Alternative solution ^ | ||
- | | Orbital parameters | varying, model interpolates values given on a 1k resolution. See values here: http://www.paleo.bris.ac.uk/~ggdjl/pmip/orbit_pmip.out | | | + | | Orbital parameters | varying, model interpolates values given on a 1k resolution. See values here: http://www.paleo.bris.ac.uk/~ggdjl/pmip/orbit_pmip.out Values are given for 132-115ka. | | |
| Date of vernal equinox | March 21 at noon | | | | Date of vernal equinox | March 21 at noon | | | ||
- | | Trace gases | varying, model interpolates values given on a 0.1k resolution. See values here: http://www.paleo.bris.ac.uk/~ggdjl/pmip/pmip_hol_lig_gases.txt | | | + | | Trace gases | varying, model interpolates values given on a 0.1k resolution. See values here: http://www.paleo.bris.ac.uk/~ggdjl/pmip/pmip_hol_lig_gases.txt Values are given for 132-115ka. | | |
| Aerosols | Same as PI | | | | Aerosols | Same as PI | | | ||
| | | | | | | | | | ||
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^ ^ PMIP3 ^ Alternative solution ^ | ^ ^ PMIP3 ^ Alternative solution ^ | ||
- | | Orbital parameters | varying, model interpolates values given on a 1k resolution. See values here: http://www.paleo.bris.ac.uk/~ggdjl/pmip/orbit_pmip.out | | | + | | Orbital parameters | varying, model interpolates values given on a 1k resolution. See values here: http://www.paleo.bris.ac.uk/~ggdjl/pmip/orbit_pmip.out Values are given for 10-0ka. | | |
| Date of vernal equinox | March 21 at noon | | | | Date of vernal equinox | March 21 at noon | | | ||
- | | Trace gases | varying, model interpolates values given on a 0.1k resolution. See values here: http://www.paleo.bris.ac.uk/~ggdjl/pmip/pmip_hol_lig_gases.txt | | | + | | Trace gases | varying, model interpolates values given on a 0.1k resolution. See values here: http://www.paleo.bris.ac.uk/~ggdjl/pmip/pmip_hol_lig_gases.txt Values are given for 10-0ka. | | |
| Aerosols | Same as PI | | | | Aerosols | Same as PI | | | ||
| | | | | | | | | | ||
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===== Initial conditions ===== | ===== Initial conditions ===== | ||
+ | |||
+ | For snapshots: | ||
^ ^ PMIP3 ^ Alternative solution ^ | ^ ^ PMIP3 ^ Alternative solution ^ | ||
- | | Initial conditions | Branch off PI after adjustement | Same as in PI | | + | | Initial conditions | Branch off PI after adjustment | Same as in PI | |
| Model spin up | Same as in PI | | | | Model spin up | Same as in PI | | | ||
+ | |||
+ | For transients: | ||
+ | |||
+ | ^ ^ PMIP3 ^ Alternative solution ^ | ||
+ | | Initial conditions | Branch off PI after adjustment | Same as in PI | | ||
+ | | Model spin up | 2kyr or less before transient starts | Same as in PI | | ||
+ | |||
+ | For initial conditions, and especially spinup, the key thing is to document what you do! | ||
+ | |||
+ | For the transient simulations, orbits and trace gas values are given for up to 2ky before the start date of the simulation. | ||
===== Participating groups ===== | ===== Participating groups ===== |