Changes between Version 18 and Version 19 of Documentation/UserGuide/PresentDay

Timestamp:

2015-01-14T22:53:47+01:00 (9 years ago)

Author:

luyssaert

Comment:

--

Documentation/UserGuide/PresentDay

@@ -7 +7 @@
 We want a 30-year equilibrium run but if we really use the boundary conditions from 1980 to 2010 we won't get anything near equilibrium given that this is the period in which climate change became very obvious. So we tried to limit the variation by copying the boundary conditions from 2008 to 2012 and cycling over these files to obtain a pseudo-chronology for 1981 to 2010. This approach enables us to run an experiment from 1981 to 2010 which makes LibIGCM happy and at the same time account for the inter-annual variability around 2010 which makes the coupled simulation more realistic. The pseudo-chronologies were aligned for 2010 (2010->2010, 2009->2009, 2008->2008, 2012->2007, 2011->2006, 2010->2005, etc). The original source files are the same as those used in the pre-industrial experiment and are stored at /ccc/work/cont003/dsm/p86ipsl/IGCM/INIT/ATM/LMDZOR/ATM/AMIP/. The cyclic boundary conditions for ocean surface temperature and sea ice extent are stored at /ccc/work/cont003/dofoco/dofoco/INPUT_FILES/OCEAN_COMP/. The same adjustments were made for the boundary condition files for ozone. The original source files are the same as those used in the pre-industrial experiment and are stored at /ccc/work/cont003/dsm/p86ipsl/IGCM/INIT/ATM/LMDZOR/Ozone/HYBRIDE/v2.clim/*.new.nc. These cyclic files to be used in this set-up can be found at /ccc/work/cont003/dofoco/dofoco/INPUT_FILES/ATM_COMP/OZON/.  
 
-LMDZOR was installed twice to avoid any conflicts between the boundary files of the pre-industrial and the present day simulations. Hence, one installation will be used for the pre-industrial runs (and will thus use the pre-industrial boundary conditions), the other installation is to be used for present day simulations. For both sets of simulations an AMIP set-up was chosen. This set-up comes with acceptable BC between 1870 and 2100 which allows us to focus on the climate and reduce issues with sea surface temperature, sea ice and aerosol concentrations. So copy the amip config.card to define the job that will create the BC
+LMDZOR was installed twice to avoid any conflicts between the boundary files of the pre-industrial and the present day simulations. Hence, one installation will be used for the pre-industrial runs (and will thus use the pre-industrial boundary conditions), the other installation is to be used for present day simulations. For both sets of simulations an AMIP set-up was chosen. Note that we use ERAI wind fields for nudging but AMIP for the other boundary conditions. It would be better to use ERAI for all boundary conditions but that is only possible for more recent simulations. This set-up comes with acceptable BC between 1870 and 2100 which allows us to focus on the climate and reduce issues with sea surface temperature, sea ice and aerosol concentrations. So copy the amip config.card to define the job that will create the BC
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 cd config/LMDZOR_v5.2/