pmip3:design:lm:index
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pmip3:design:lm:index [2009/07/09 22:35] – ammann | pmip3:design:lm:index [2010/02/12 15:55] – Added link to 8k2 jypeter | ||
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~~ODT~~ | ~~ODT~~ | ||
- | ~~DISCUSSION~~ | + | ~~DISCUSSION:closed~~ |
< | < | ||
- | //Go to =>// [ [[pmip3: | + | //Go to =>// [ [[pmip3: |
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===== Boundary conditions ===== | ===== Boundary conditions ===== | ||
- | |||
==== Summary of Last Millennium boundary conditions ==== | ==== Summary of Last Millennium boundary conditions ==== | ||
^ ^ | ^ ^ | ||
- | | Orbital parameters | + | | Orbital parameters |
- | | | Table provided | + | | Date of vernal equinox |
- | | Date of vernal equinox | + | | Trace gases | Annually varying (850-1850) |
- | | Trace gases | Annually varying (850-1850) | constant at CMIP5 control levels | + | | |
- | | | + | | Solar irradiance |
- | | Aerosols | + | | Ozone | solar related variations (parameterised as function of change in solar irradiance - Drew Shindell) |
- | | | | | | + | | |
- | | | + | | Vegetation |
- | | Vegetation | + | | Ice sheets |
- | | Ice sheets | + | | Topography and coastlines |
- | | Topography and coastlines | + | |
Please use the [[index# | Please use the [[index# | ||
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Millennium simulations (black curve), a 11 year cycle was added for consistency over the | Millennium simulations (black curve), a 11 year cycle was added for consistency over the | ||
entire period. | entire period. | ||
+ | |||
+ | Notes: We will impose an 11 year cycle on pre-sunspot reconstructions for consistency of the spectrum of natural variability. Additionally, | ||
+ | |||
+ | Candidate reconstructions: | ||
+ | |||
+ | ==== Volcanic Forcings ==== | ||
+ | |||
+ | Issues: compatability of eff. rad, zonality, height distribution with modern satellite (Sato) data. | ||
+ | |||
+ | Candidate datasets: Crowley, Ammann - differences in thresholds for significant eruptions, peak forcing etc. Need merged/ | ||
+ | |||
+ | ==== Reconstructed evolution of trace gases ==== | ||
+ | |||
+ | The evolution of CO< | ||
+ | |||
+ | |||
+ | ==== Orbital forcing ==== | ||
+ | |||
+ | The following orbital parameters parameters should be used, if they are not internally calculated. | ||
+ | |||
+ | Note: calculation from Berger (1978), annually varying. | ||
+ | |||
+ | === Precomputed table === | ||
+ | |||
+ | The {{: | ||
+ | [[gschmidt@giss.nasa.gov|Gavin Schmidt]] (GISS). | ||
+ | |||
+ | === Linear regressions === | ||
+ | |||
+ | Over the period 0-2100 CE, the parameters are well approximated by the following linear regressions: | ||
+ | |||
+ | ^ Parameter | ||
+ | | ECC | 0.017475 - 0.000000382 * Year | | ||
+ | | OBL | 23.697 | ||
+ | | PERI-180 | ||
+ | |||
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pmip3/design/lm/index.txt · Last modified: 2010/09/16 14:38 by jypeter