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PreIndSim

Timestamp:: 2014-11-05T13:25:39+01:00 (9 years ago)
Author:: luyssaert
Comment:: --

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Documentation/UserGuide/PreIndSim

-                      v50
+                      v51
 cp EXPERIMENTS/LMDZ/CREATE_amip/config.card ./
 }}}
 The following changes to were made to the config.card:
  (1) Add a suffix, i.e., -1750 to the job name so that the pre-industrial and present day boundary files will not interfere with each other
+The following changes were made to the config.card:
+ (1) Add a suffix, i.e., -1750 (but keep the grid dimensions 128x118x39) to the job name so that the pre-industrial and present day boundary files will not interfere with each other on the store directory
 {{{
 JobName= ELI-128x118x39-1750
 …
 === PARAM/orchidee.def_CWRR ===
 When installing LMDZOR we substituted the trunk version of ORCHIDEE by the DOFOCO-branch. The coupled set-up has some left overs of previous ORCHIDEE versions. Earlier the run.def of ORCHIDEE contained all settings because that was very difficult to read and maintain all parameters now get a default value and only when the default value needs to be changed, the parameter should be mentioned in the run.def. This basically resulted in an empty run.def when running a default set-up. LMDZOR still comes with unreadable full run.def which in the LMDZOR world is called PARAM/orchidee.def_CWRR. We propose to delete settings from the old run.def and only keep the following settings:
+When installing LMDZOR we substituted the trunk version of ORCHIDEE by the DOFOCO-branch. The coupled set-up has some left overs of previous ORCHIDEE versions. Earlier the run.def of ORCHIDEE contained all settings. Because such an extensive file was very difficult to read and maintain all parameters now get a default value and only when the default value needs to be changed, the parameter should be mentioned in the run.def. This basically resulted in an empty run.def when running a default set-up. LMDZOR still comes with the unreadable full run.def which in the LMDZOR world is called PARAM/orchidee.def_CWRR. We propose to delete all settings from the old run.def and only keep the following settings:
 {{{
 …
 LAND_COVER_CHANGE=n
 }}}
 Within the 20-year coupled run the land surface will stay constant to that described by the restart file that will be used, i.e., 1750. Forest management and litter raking are still activated (else we will affect the C-pools). We will keep these settings constant to their values for the year 1750. We simply hard code the years for these maps as detailed below. Note that because we start from a restart file the [InitialStateFiles] are not used. We have to define the litter and FM maps as [BoundaryFiles] which are read only once during the year.
+Within the 20-year coupled run the land surface will stay constant to that described by the restart file that will be used, i.e., 1750. Forest management and litter raking are still activated (else we will affect the C-pools). We will keep these settings constant to their values for the year 1750. We simply hard code the years for these maps as detailed below. Note that because we start from a restart file the [InitialStateFiles] are not used. We have to define the litter and FM maps as [BoundaryFiles] which are read only once during the year. Note that 1:12: means that the file will be copied to the working directory at the first integration step and then every 12 iterations until the simulation is finished. More information on the difference between InitialStateFiles, BoundaryFilesn and SmoothFiles can be found at http://forge.ipsl.jussieu.fr/igcmg_doc/wiki/DocEsetup#COMPdirectory
 {{{
 [InitialStateFiles]
 …
 #ok_cdnc=y
 }}}
+We can choose from 5 aerosol groups which groups we want to account for during the simulation. 6 means that all 5 groups will be used. Activating ok_ade and ok_aie implies that the model accounts for both the direct and indirect effects of aerosols. Because we run without INCA, the aerosols are coupled and aerosol_couple is set to n. For ozone it a day time climatology, a night time climatology or both (=2) can be used. cdnc stands for cloud number count. The path of the aerosol files is also specified in COMP/lmdz.card (see below). For a more detailed description of the these aerosols settings have a look at [http://forge.ipsl.jussieu.fr/igcmg_doc/wiki/DocImodelBlmdz#Informationabouttheaerosolradiativeforcing]. As we are not sure which information is read first, i.e., the PARAM/config.def_preind or the COMP/lmdz.card we don't want to take the risk that the pre-industrial settings get overwritten and so we commented-out the setting in the COMP/lmdz.card. In case you want to regrid your own aerosol files the relevant scripts and instructions (in French) can be found at [http://forge.ipsl.jussieu.fr/igcmg/wiki/InfosAerosol#Cr%C3%A9ationetinterpolationdesfichiersdefor%C3%A7ages].
+It is also possible to deactivate aerosol forcing. To do so, remove the lines containing aerosols_ from the List section and change lmdz.card to the following :
+{{{
+# manage radiative aerosol effect and ozone
+flag_aerosol=0
+ok_ade=n
+ok_aie=n
+aerosol_couple=n
+read_climoz=0
+ok_cdnc=n
+}}}
+Note that read_climoz=0 will also deactivate the reading of ozone. Ozone is regridded by the job LMDZ/CREATE_ (as are some other boundary conditions such as SST, sea ice, ...) so this is not necessary to deactivate.
+We can choose from 5 aerosol groups which groups we want to account for during the simulation. 6 means that all 5 groups will be used. Activating ok_ade and ok_aie implies that the model accounts for both the direct and indirect effects of aerosols. Because we run without INCA, the aerosols are coupled and aerosol_couple is set to n. For ozone it a day time climatology, a night time climatology or both (=2) can be used. cdnc stands for cloud number count. The path of the aerosol files is also specified in COMP/lmdz.card (see below). For a more detailed description of the these aerosols settings have a look at [http://forge.ipsl.jussieu.fr/igcmg_doc/wiki/DocImodelBlmdz#Informationabouttheaerosolradiativeforcing]. As we are not sure which information is read first, i.e., the PARAM/config.def_preind or the COMP/lmdz.card we don't want to take the risk that the pre-industrial settings get overwritten and so we commented-out the setting in the COMP/lmdz.card. In case you want to regrid your own aerosol files the relevant scripts and instructions (in French) can be found at [http://forge.ipsl.jussieu.fr/igcmg/wiki/InfosAerosol#Cr%C3%A9ationetinterpolationdesfichiersdefor%C3%A7ages]. Interesting to know but NOT part of this set-up: it is also possible to deactivate aerosol forcing. To do so, remove the lines containing aerosols_ from the List section and change lmdz.card to the following : flag_aerosol=0, ok_ade=n, ok_aie=n, aerosol_couple=n, read_climoz=0, ok_cdnc=n. Note that read_climoz=0 will also deactivate the reading of ozone. Ozone is regridded by the job LMDZ/CREATE_ (as are some other boundary conditions such as SST, sea ice, ...) so this is not necessary to deactivate.
 Activate nudging by setting ok_guide=y and add the path to the nudging files in Boundary Files section List in lmdz.card. (the French for 'nudging' is 'guider')