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6. SMOKE Training – Merging
¨ Set the MRGFILES environment variable to “ARGTS_L BBGTS3D_L
AENGGTS3D_L BGGTS_L” to merge the area-, biomass burning-, area energyand biogenic-source model-ready files that we created.
¨ Set MRGGRID_MOLE to “Y” to match the units of the MRGFILES files
(moles).
¨ Set SRCABBR to match the source types we are merging
(area+biogenic+biomass burning = arbgbb).
C. Save the merge script.
D. From the $SCRIPTS/run directory, execute the merge script:
> smk_mrgall_train_<initials>.csh
6.4
Confirm that Mrggrid worked
3. Start PAVE if it is not already running. Load the $ARGTS_L, $AENGTS3D_L,
$BBGTS3D_L, $BGGTS_L and $EGTS_L files from their respective output directories.
Create a formula for NO that subtracts the component emissions from the combined file, and
plot this formula. The results should be close to zero everywhere.
You can check other species in the various files and compare them to the $EGTS_L file
created in Step 2. You can also compare your log files and results with those in
$ANSWERS/merge/step_2/.
6.5
Create a biomass-burning emissions sensitivity case
4. In this exercise you will rerun the program Mrggrid program to combine all of the files from
the previous step, except for biomass burning emissions. Removing one emissions sector
from an emission simulation is one way to determine the sensitivity of air quality to the
emissions from that sector. Comparing the result of a pair of air quality model simulations,
one with and the other without biomass burning emissions, will demonstrate the impacts of
biomass burning on air quality. This exercise demonstrates how to set-up a “brute-force”
emissions sensitivity for air quality modeling.
A. Edit the merge script that you created in Step 2 to create merged emissions that do not
include biomass burning data. Set the MRGFILES environment variable to “ARGTS_L
AENGGTS_L BGGTS_L”. Notice how you removed the variable BBGTS3D_L from the
list created previously. Also change the SRCABBR environment variable to reflect that
the emissions only contain area and biogenic sources (arbg).
Save the script and exit from the text editor.
B. Go the $OUTPUT directory and rename the previous SMOKE output file.
> cd $OUTPUT
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6-2
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