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pmip3:design:8k2:index [2010/03/30 09:16] renssen |
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<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>**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> | ||
- | ===== Boundary conditions for 8.5 ka ===== | + | ===== Boundary conditions ===== |
==== Summary of 8.2ka boundary conditions ==== | ==== Summary of 8.2ka boundary conditions ==== | ||
+ | Boundary conditions below are for 8.5 ka (i.e. before lake drainage) | ||
^ ^ PMIP3/CMIP5 ^ Minimum solution ^ | ^ ^ PMIP3/CMIP5 ^ Minimum solution ^ | ||
- | | Orbital parameters | [ **ecc** = 0.xxxxx ] - [ **obl** = xx.xxx° ] - [ **peri-180°** = 0.xx° ] | | | + | | Orbital parameters | [ **ecc** = 0.19199 ] - [ **obl** = 24.222° ] - [ **peri-180°** = 319.495° ] | | |
| Date of vernal equinox | March 21 at noon | | | | Date of vernal equinox | March 21 at noon | | | ||
- | | Trace gases | [ **CO<sub>2</sub>** = xxx ppm ] - [ **CH<sub>4</sub>** = xxx ppb ] - [ **N<sub>2</sub>O** = xxx ppb ] - [ **CFC** = xxx ] - [ **O<sub>3</sub>** = same as PI ] | | | + | | Trace gases | [ **CO<sub>2</sub>** = 260 ppm ] - [ **CH<sub>4</sub>** = 660 ppb ] - [ **N<sub>2</sub>O** = 260 ppb ] - [ **CFC** = xxx ] - [ **O<sub>3</sub>** = same as PI ] | | |
| Aerosols | Same as PI | | | | Aerosols | Same as PI | | | ||
| | | | | | | | | | ||
- | | Solar constant | xxxx W/m<sup>2</sup> | As in PI | | + | | Solar constant | As in PI | | |
| Vegetation | prescribed or interactive as in CMIP5 PI | | | | Vegetation | prescribed or interactive as in CMIP5 PI | | | ||
| Ice sheets | Remnant Laurentide ice-sheet (provided*) | Same as PI | | | Ice sheets | Remnant Laurentide ice-sheet (provided*) | Same as PI | | ||
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Please use the [[index#page_bottom_tag|discussion]] panel to **comment** this table! | Please use the [[index#page_bottom_tag|discussion]] panel to **comment** this table! | ||
+ | ==== Freshwater forcing ==== | ||
+ | |||
+ | Two different types of freshwater forcing: the background melt-flux from the Laurentide Icesheet, and the Lake Agassiz drainage. The former supposedly prevented Labrador Sea deep convection (see Hillaire-Marcel et al. 2006 GRL) | ||
+ | |||
+ | **Proposed Background Early Holocene melt-water forcing** (mandatory) | ||
+ | | Flux | 0.05 Sv over 500 years | | ||
+ | | Location | Either part or all of the Labrador Sea (up to the individual modeling groups, as long as it is not added outside the Labrador Sea)| | ||
+ | **Proposed Lake Agassiz drainage** (mandatory): | ||
+ | | Fux | 2.5 Sv over 1 year | | ||
+ | | Location | Either part or all of the Labrador Sea (up to the individual modeling groups, as long as it is not added outside the Labrador Sea)| | ||
+ | | Ensemble | this experiment should be completed at least three times, beginning at different years in the control simulation| | ||
+ | | Duration | experiment should be integrated until the AMOC recovers, except in the case of unrealistically long (i.e., multicentury) recoveries| | ||
==== Vegetation ==== | ==== Vegetation ==== | ||
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* Computed by the model (models with dynamic vegetation) | * Computed by the model (models with dynamic vegetation) | ||
- | There are still questions concerning the possibility to have a 6ka reconstructed vegetation from a combination of model output and data analyses that could be used for sensitivity experiments. Please tell if you are interested by such a map and what would be the best variables (pft?) that should be provided (see comment from B. Otto-Bliesner in the discussion pannel). | ||
==== For Earth System Models with interactive carbone cycle ==== | ==== For Earth System Models with interactive carbone cycle ==== |