Difference between revisions of "Solution to UKCA & UMUI Tutorial 5 Task 5.1"
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===Regrid your emissions dataset=== |
===Regrid your emissions dataset=== |
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+ | [[Image:Xconv_Regridded.png|thumb|300px|right|Figure 1: Comparison of the 0.5x0.5 degree data and the N96 regridded data. Note the shift in the grid introduced by changing the ''first longitude''.]] |
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Open the ''Emissions_of_ALICE.nc'' file using Xconv. Select the field (called "Emissions of ALICE in kg/m^2/s") and click on the '''Trans''' button on the top right of the GUI. You should then |
Open the ''Emissions_of_ALICE.nc'' file using Xconv. Select the field (called "Emissions of ALICE in kg/m^2/s") and click on the '''Trans''' button on the top right of the GUI. You should then |
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Revision as of 14:25, 20 June 2013
Back to the adding new chemical emissions tutoroal
Task
You were asked to
In the
/work/n02/n02/ukca/Tutorial/Task5.1directory on HECToR, or the
/projects/ukca/Tutorial/Task5.1directory on MONSooN, there is the file Emissions_of_ALICE.nc which is a 0.5x0.5 degree resolution surface emission field. You should regrid this file to N96, and then make a new surface emissions ancillary file with this as slot 316. You should then use this new file, and the corresponding user STASHmaster file, in your UMUI job.
Solution
Before you start you should make a new directory to hold your files.
Regrid your emissions dataset
Open the Emissions_of_ALICE.nc file using Xconv. Select the field (called "Emissions of ALICE in kg/m^2/s") and click on the Trans button on the top right of the GUI. You should then
- Select area weighted interpolation (the second option down)
- You should then scroll down this panel and
- Set the number of columns to 192
- Set the first longitude to 0.000000
- Set the column spacing to 1.875000
- Set the number of rows to 145
- Set the first latitude to -90.000000 (i.e. the South Pole)
- Set the row spacing to 1.250000
Now click Apply. The window should read
Area weighted interpolation from 720x360 Regular grid to 192x145 Regular grid
and the nx and ny values should read 192 and 145. Now output this field to a netCDF file in your directory.
An example of this file can be found at
/work/n02/n02/ukca/Tutorial/Task5.1/solution/Task5.1_Emissions_of_ALICE_N96.nc
on HECTor and at
/projects/ukca/Tutorial/Task5.1/solution/Task5.1_Emissions_of_ALICE_N96.nc
on MONSooN.
Make your new STASH item
You are using the file
/home/ukca/userprestash/VN8.2/emiss_TCMIM_Aero.presm
on PUMA to define your emissions. Take a copy of this file and add the following entry just after field 315:
# 1| 1 | 0 | 316 |ALICE surf emissions | 2| 2 | 0 | 1 | 1 | 5 | -1 | -1 | 0 | 0 | 0 | 0 | 3| 000000000000000000000000000000 | 00000000000000000001 | 3 | 4| 1 | 0 | -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 | 5| 0 | 546 | 0 | 129 | 0 | 0 | 0 | 0 | 0 | #
Save this file and use it in your job in Model Selection → Atmosphere → STASH → User-STASHmaster files. Diags, Progs & Ancills.
An example file can be found at
/home/ukca/userprestash/VN8.2/Tutorial/Task5.1_emiss_TCMIM_Aero.presm
Now go to Model Selection → Atmosphere → STASH → Initialisation of User Prognostics and set the Option column for this field to 2.
Written by Luke Abraham 2013