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noresm:runmodel:advancednoresm2 [2014-01-27 13:24:14] alfg created |
noresm:runmodel:advancednoresm2 [2022-05-31 09:29:32] (current) |
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| - | ===== Advanced configuration of NorESM2 ===== | + | ====== Advanced configuration of NorESM2 ====== |
| + | |||
| + | **NOTE THAT THE COMPSETS MENTIONED IN THIS EXAMPLE ARE NO LONGER MAINTAINED! THE GENERAL EXPLANATION AND IDEAS ARE STILL VALID! | ||
| + | ** | ||
| + | ===== Creating a new compset ===== | ||
| + | |||
| + | The essential file to edit is | ||
| + | < | ||
| + | ~/ | ||
| + | </ | ||
| + | |||
| + | This examples shows how to simply add a to the " | ||
| + | |||
| + | Under "< | ||
| + | |||
| + | < | ||
| + | <COMPSET sname=" | ||
| + | </ | ||
| + | |||
| + | The " | ||
| + | |||
| + | < | ||
| + | < | ||
| + | </ | ||
| + | |||
| + | The compset needs a description, | ||
| + | < | ||
| + | <desc compset=" | ||
| + | </ | ||
| + | |||
| + | We could also define a specific use-case (namelist) for our compset. This would need a line like: | ||
| + | < | ||
| + | < | ||
| + | </ | ||
| + | |||
| + | This would only work if the file my_namelist.xml exists as | ||
| + | < | ||
| + | noresm/ | ||
| + | </ | ||
| + | |||
| + | |||
| + | ===== Setting up a case with the new compset and building the model ===== | ||
| + | |||
| + | It should now be possible to create a new case directory, which we here name FAMIPOSLOtst | ||
| + | and configure with 1 degree horizontal atmospheric resolution; | ||
| + | |||
| + | < | ||
| + | ./ | ||
| + | </ | ||
| + | |||
| + | and finally set up and compile the model: | ||
| + | < | ||
| + | cd ../ | ||
| + | </ | ||
| + | |||
| + | < | ||
| + | ./ | ||
| + | </ | ||
| + | |||
| + | < | ||
| + | ./ | ||
| + | </ | ||
| + | |||
| + | ===== Why does it work to change config_compsets.xml ? | ||
| + | |||
| + | In NorESM there are 3 new config-options for CAM: | ||
| + | * -cam-oslo aerlife (turns on transport of oslo tracers) | ||
| + | * -cam-oslo dirind | ||
| + | * -cam-oslo warmclouds (also turns on interaction with warm clouds) | ||
| + | |||
| + | They change number of tracers and turn on different preprocessor flags in in a perl script called " | ||
| + | < | ||
| + | models/ | ||
| + | </ | ||
| + | |||
| + | To understand the implementation do: | ||
| + | < | ||
| + | svn diff -r 202 models/ | ||
| + | </ | ||
| + | |||
| + | The new oslo-options also need to be defined, see | ||
| + | < | ||
| + | models/ | ||
| + | </ | ||
| + | |||
| + | To see how these new options were added, do: | ||
| + | < | ||
| + | svn diff -r 202 models/ | ||
| + | </ | ||
| + | |||
| + | |||
| + | ===== Configure nudging ===== | ||
| + | |||
| + | ==== Create the met-data ==== | ||
| + | |||
| + | First run the model to produce 6 hourly data. The following namelists are needed: | ||
| + | |||
| + | < | ||
| + | user_nl_cam | ||
| + | & | ||
| + | mfilt = 1, 4, | ||
| + | nhtfrq | ||
| + | avgflag_pertape =' | ||
| + | fincl2 | ||
| + | </ | ||
| + | |||
| + | < | ||
| + | user_nl_clm | ||
| + | & | ||
| + | hist_mfilt | ||
| + | hist_nhtfrq | ||
| + | hist_avgflag_pertape | ||
| + | hist_fincl2 | ||
| + | </ | ||
| + | |||
| + | ==== Use the met-data in another run ==== | ||
| + | |||
| + | First create a compset which has the configure-option " | ||
| + | |||
| + | Then use this compset to create a case. You need the following user-input (for example in your user_nl_cam) | ||
| + | |||
| + | < | ||
| + | & | ||
| + | met_data_file='/ | ||
| + | met_filenames_list = '/ | ||
| + | </ | ||
| + | |||
| + | This info can be added directly in a use_case which you associate with the compset created (see e.g. 2000_cam5_oslonudge.xml) | ||
| + | |||
| + | where met_data_file is the first met-data file to read, and met_filenames_list is a list of the following met-data. The first lines of the file should look something like this (guess what the rest of the file should look like? 8-o: ) | ||
| + | < | ||
| + | / | ||
| + | / | ||
| + | / | ||
| + | </ | ||
| + | |||
| + | This file can be created at the place where you put the metdata with this command: | ||
| + | < | ||
| + | alfgr@hexagon-4:/ | ||
| + | </ | ||
| + | |||
| + | ==== Namelist options ==== | ||
| + | When looking at aerosol indirect effects, it's recommended to nudge only U, V and PS: | ||
| + | < | ||
| + | & | ||
| + | | ||
| + | </ | ||
| + | |||
| + | Choose relaxation time (hours). Use the same time as dt in met_data_file: | ||
| + | < | ||
| + | & | ||
| + | | ||
| + | </ | ||
| + | |||
| + | |||
| + | ==== Nudge to ERA-interim reanalysis ==== | ||
| + | Link to ERA-interim metdata instead of model produced metdata. Remember to choose the files corresponding to your resolution (examples below are for f09_f09 and 32 levels in the vertical): | ||
| + | < | ||
| + | & | ||
| + | | ||
| + | | ||
| + | </ | ||
| + | |||
| + | Add also the ERA-topography (no matter which fields you are nudging): | ||
| + | < | ||
| + | & | ||
| + | | ||
| + | </ | ||