| 1 | Solar forcing dataset from CMIP6 |
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| 2 | See http://www.wcrp-climate.org/wgcm-cmip/wgcm-cmip6 |
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| 3 | and http://solarisheppa.geomar.de/cmip6 |
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| 4 | |
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| 5 | Version 3.1 |
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| 6 | Not distributed through ESGF yet |
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| 7 | The data is available on ciclad in /prodigfs/project/input4MIPs/SOLAR/ |
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| 8 | |
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| 9 | Data was processed by Rong-Ming in June 2016 and reprocessed in October 2016 by Olivier Boucher. |
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| 10 | The final versions of the script are CMIP6_historical.m and CMIP6_piControl.m |
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| 11 | it can be run in matlab on ciclad only on a line command |
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| 12 | > run CMIP6_historical.m |
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| 13 | A script process.sh runs all scripts and post-processes the files for use in IPSL-CM6. |
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| 14 | |
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| 15 | The data are used to prescribe the solar constant (tsi) and its distribution (ssi_frac) in the new |
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| 16 | (RRTM) SW scheme of the LMDz model. This is activated with the ok_suntime_rrtm=y flag. |
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| 17 | The solar constant and RSUN are output in the paramphy netcdf output file. |
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| 18 | |
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| 19 | Daily data are used. The number of timesteps in the nc file has to match the number of days |
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| 20 | of the year in the model (ie 360, 365 or 366 days). Otherwise the model stops. |
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| 21 | A tolerance was added so that a 366-day file can be used in a 365-day model year. |
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| 22 | |
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| 23 | Files are prepared for two bands (NSW=2) or 6 bands (NSW=6) option. Default NSW=6 is used ! |
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| 24 | |
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| 25 | For piControl and pdControl, a single value (repeated over the number of days) is used: |
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| 26 | solarforcing_v3.1_XXControl_ave_Ybands_ZZZdays.nc |
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| 27 | XX=pi or pd for pre-industrial or present-day control |
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| 28 | Y=2 or 6 depending on whether NSW=2 or 6 |
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| 29 | ZZZ=360, 365 or 366 days according to which calendar (and number of days in the year) is chosen. |
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| 30 | |
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| 31 | The average for piControl consists of the first two solar cycles after 1850 (as per CMIP6 protocol) |
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| 32 | The average for pdControl consists of a 1991-2010 average (not an official CMIP6 run). |
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| 33 | |
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| 34 | Annual files are available for the historical and future period: |
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| 35 | solarforcing_v3.1_daily_6bands_XXXX.nc |
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| 36 | where XXXX is the year. The files are for a Gregorian calendar (365 and 366 days according to the year). |
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| 37 | |
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| 38 | There is also a scenario with a lower solar constant in 21st century for sensitivity study. |
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| 39 | This is not an official CMIP6 scenario though. |
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| 40 | |
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| 41 | The solar forcing file is to be renamed solarforcing.nc in the running directory. |
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| 42 | |
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| 43 | Olivier Boucher |
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| 44 | 11/10/2016 |
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| 45 | revised 27/09/2017 |
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