Update CH4 emissions from EDGARv7 to EDGARv8

[nicholasbalasus]

Name and Institution (Required)

Name: Nick Balasus
Institution: Harvard University

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• Contributing guidelines

Describe the update

I have generated monthly EDGAR v8 emissions files for CH4 for 2010-2022. @msulprizio put them at ExtData/HEMCO/CH4/v2024-02/EDGARv8. This update makes them the default. I have checked the files for COARDS compliance. This is tested for a global CH4 simulation for all of 2019 using GCClassic. The difference in hourly XCH4 averaged across all of 2019 is shown below. The differences are mostly minor and reflect a better distribution of the emissions seasonally as well as EDGAR v7 to EDGAR v8 updates. From what I can tell, the largest differences (over India and Brazil) are due to 0.1° x 0.1° grid cells in EDGAR v8 with much higher enteric fermentation (ENF) and manure management (MNM) emissions. For example, in the annual emissions, ENF at lon=78.15°, lat=11.25° is 1.81e-10 kg/m2/s in EDGAR v7 and 2.15e-6 kg/m2/s in EDGAR v8.

In this folder, there are the files needed to generate the EDGAR v8 emissions:
scripts.zip

Briefly, this is the README.

These are directions for how monthly EDGAR v8 files can be generated for a
given year. The general process is to download the annual emissions files and
apply the monthly scale factors that are specific to each country/sector/year.
The scale factors are corrected for the fact that there are a different number
of days in each month. The following files are needed:

- environment.yml
- country_codes.csv
- country_mask.csv
- edgar_v8.py

The environment file can be used to create the appropriate environment for 
running the python script, while the two CSV files come from GFEIv2 and are
needed to determine which grid cell belongs to which country in order to apply
the monthly scale factors provided by EDGAR. See comments in the python script
for a more comprehensive description. To run using slurm, use these commands:

year="2022"
dir="/n/holyscratch01/jacob_lab/nbalasus"
sbatch -p huce_cascade -t 0-04:00 --mem 184G -c 22 --wrap "source ~/.bashrc;
conda activate edgar_env; python edgar_v8.py ${year} ${dir}"

-- Nick Balasus ([email protected]), 30 Jan 2024

Expected changes

Only to the CH4 and carbon simulations.

Reference(s)

n/a

Related Github Issue(s)

This is the same as #2168 but with comments addressed + rebased on the updated dev/no-diff-to-benchmark.

[msulprizio]

@nicholasbalasus I have two requested fixes. Otherwise, this looks good!

[nicholasbalasus]

Thanks! Fixed + squashed.

[msulprizio]

All GCHP and GCClassic integration tests have passed.