Changes between Version 9 and Version 10 of Documentation/UserGuide/FutureTime

Timestamp:

2016-10-21T20:12:53+02:00 (8 years ago)

Author:

luyssaert

Comment:

--

Documentation/UserGuide/FutureTime

@@ -17 +17 @@
 }}}
 
-We want a 30-year equilibrium run but if we really use the boundary conditions from 2071 to 2100 we won't get anything near equilibrium given that under the rcp 4.5 scenario there is climate change. We tried to limit the variation by copying the boundary conditions from 2091 to 2100 and cycling over these files to obtain a pseudo-chronology for 2101 to 2130. This approach enables us to get closer to equilibrium while accounting for inter-annual variability around 2100 which makes the coupled simulation more realistic. The pseudo-chronologies were aligned for 2010 (2101->2100, 2102->2099, 2103->2098, ..., 2110->2091, 2111->2092, 2112->2093, etc). The original source files are stored at /ccc/work/cont003/dofoco/dofoco/INPUT_FILES/OCEAN_COMP/IPSL_CM_45/ORIGINAL/, the cyclic boundary conditions for ocean surface temperature and sea ice extent are stored at /ccc/work/cont003/dofoco/dofoco/INPUT_FILES/OCEAN_COMP/IPSL_CM_45/CYCLIC/. The same adjustments were made for the boundary condition files for ozone. The original source files are stored at /ccc/work/cont003/dsm/p86ipsl/IGCM/INIT/ATM/LMDZOR/Ozone/HYBRIDE/v2.clim/*.new.nc. The 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 once more to avoid any conflicts between the boundary files of the pre-industrial, present day, and future 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 and the third installation is used for the future simulations. For all simulations an AMIP set-up was chosen. 
-
-
-CHECK +++ 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 +++
+We want a 30-year equilibrium run but if we really use the boundary conditions from 2071 to 2100 we won't get anything near equilibrium given that under the rcp 4.5 scenario there is climate change. We tried to limit the variation by copying the boundary conditions from 2091 to 2100 and cycling over these files to obtain a pseudo-chronology for 2101 to 2130. This approach enables us to get closer to equilibrium while accounting for inter-annual variability around 2100 which makes the coupled simulation more realistic. The pseudo-chronologies were aligned for 2010 (2101->2100, 2102->2099, 2103->2098, ..., 2110->2091, 2111->2092, 2112->2093, etc). The original source files are stored at /ccc/work/cont003/dofoco/dofoco/INPUT_FILES/OCEAN_COMP/IPSL_CM_RCP45/ORIGINAL/, the cyclic boundary conditions for ocean surface temperature and sea ice extent are stored at /ccc/work/cont003/dofoco/dofoco/INPUT_FILES/OCEAN_COMP/IPSL_CM_RCP45/CYCLIC/. The same adjustments were made for the boundary condition files for ozone. The original source files are stored at /ccc/work/cont003/dsm/p86ipsl/IGCM/INIT/ATM/LMDZOR/Ozone/HYBRIDE/v2.clim/*.new.nc. The cyclic files to be used in this set-up can be found at /ccc/work/cont003/dofoco/dofoco/INPUT_FILES/ATM_COMP/OZON/IPSL_CM_RCP45/CYCLIC/.  
+
+LMDZOR was installed once more to avoid any conflicts between the boundary files of the pre-industrial, present day, and future 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 and the third installation is used for the future simulations (both RCP 4.5 and 8.5). For all simulations an AMIP set-up was chosen. 
+
+Copy the amip config.card to define the job that will create the BC
 {{{
 cd config/LMDZOR_v5.2/
 cp EXPERIMENTS/LMDZ/CREATE_amip/config.card ./
 }}}
+
 The following changes were made to the config.card:
- (1) Add a suffix, i.e., -2100 (but keep the grid dimensions 128x118x39) to the job name so that the pre-industrial, present day and future boundary files will not interfere with each other on the store directory
-{{{
-JobName= ELI-128x118x39-2100
+ (1) Add a suffix, i.e., -2100-RCP45 (but keep the grid dimensions 128x118x39) to the job name so that the pre-industrial, present day and future boundary files will not interfere with each other on the store directory
+{{{
+JobName= ELI-128x118x39-2100-RCP45
 }}}
  (2) Set the begin date to the earliest year available. We are planning 20 year long equilibrium simulations but we are not sure whether it will take 20 or 30 years so we simulate the BC for 30 years to be on the safe side.
@@ -40 +40 @@
 
 The following, further, changes were made to the COMP/lmdz.card:
-
-
-+++WORKING ON THIS SECTION+++
-
-
-
-3) run CREATE_amip using these files to produce the limit.nc files. The tsol and pourc_sic files should be renamed as histmth_sst.nc and histmth_sic.nc dans lmdz.card, see section 3.2.3
-
-
 
  (1) Specify in the list of parameter files that the BC should be based on the predefined present day settings. These settings contain the TOA solar incoming radiation, atmospheric CO2, CH4 and N2O among other settings. Have a look in PARAM/config.def_preind to get a better idea of these settings.
@@ -54 +45 @@
 (${SUBMIT_DIR}/PARAM/config.def_actuel     ,  config.def),    \
 }}}
- (2) In the DRIVER/lmdz.driver it is specified that in the absence of the Oasis coupler, which is the case for LMDZOR, the ocean is forced. Hence the need of SST and sea ice files for all years in the experiment. These newly defined years now have to be used in COMP/lmdz.card. Therefore, change the boundary files as follows (With help from Josefine http://forge.ipsl.jussieu.fr/igcmg_doc/wiki/DocImodelBlmdz) :
-{{{
-List=   (/ccc/work/cont003/dofoco/dofoco/MAPS/FUTURE_CLIM/IPSL_CM_45/v3.rcp45.1_tsol_oce_${year}.nc, histmth_sst.nc), \
-        (/ccc/work/cont003/dofoco/dofoco/MAPS/FUTURE_CLIM/IPSL_CM_45/v3.rcp45.1_pourc_sic_${year}.nc, histmth_sic.nc), \
-        (/ccc/work/cont003/igcmg/igcmg/IGCM/ATM/LMD9695/AR5/RCP45/climoz_LMDZ_2100_v2.nc, climoz.nc)
-
+ (2) In the DRIVER/lmdz.driver it is specified that in the absence of the Oasis coupler, which is the case for LMDZOR, the ocean is forced. Hence the need of SST and sea ice files for all years in the experiment. These cyclic files created above have now to be used in COMP/lmdz.card. Therefore, change the boundary files as follows and note that the tsol and pourc_sic files should be renamed as histmth_sst.nc and histmth_sic.nc (for more options see http://forge.ipsl.jussieu.fr/igcmg_doc/wiki/DocImodelBlmdz):
+{{{
+List=   (/ccc/work/cont003/dofoco/dofoco/INPUT_FILES/OCEAN_COMP/IPSL_CM_RCP45/CYCLIC/v3.rcp45.4_tsol_oce_${year}.nc, histmth_sst.nc), \
+        (/ccc/work/cont003/dofoco/dofoco/INPUT_FILES/OCEAN_COMP/IPSL_CM_RCP45/CYCLIC/v3.rcp45.4_pourc_sic_${year}.nc, histmth_sic.nc), \
+        (/ccc/work/cont003/dofoco/dofoco/INPUT_FILES/ATM_COMP/OZON/IPSL_CM_RCP45/CYCLIC/tro3_${year}.nc, climoz.nc)
 }}}
 
@@ -67 +57 @@
 }}}
 
-Open PARAM/config.def_actuel and change pmagic to its pre-industrial value (0.000 in this experiment)
+Open PARAM/config.def_rcp45 and change pmagic to its pre-industrial value (0.000 in this experiment)
 {{{
 pmagic = 0.000