README -- Contents of HEMCO/TIMEZONES/v2024-02
05 Feb 2024
GEOS-Chem Support Team

Files:
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(1) timezones_vohra_2017_0.1x0.1.nc

    Contains offset from UTC in minutes.  Used for HEMCO emissions.

(2) scripts/make_timezones_coards-compliant

    Script containing several NCO commands to correct on-COARDS-conforming
    variables and attributes.  This is needed for GCHP to read the file.

References:
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See Github issues:

- https://github.com/geoschem/geos-chem/issues/1928.

- https://github.com/geoschem/geos-chem/pull/2145


Karn Vohra (Github Handle @karnvoh) writes:

   The updated file...has higher resolution data for 12 months and so is
   much larger than the current file. I had also conducted a benchmark
   simulation for version 13 and the results are in the attached slides
   (in PR #2145).  The recommendation is to use it over land mass as there
   was a small change in shipping NO emissions from the two timezone files
   (slide 5 of the attached). We also find that there is a small change in
   soil NO emissions at the grid cell level from the two timezone files
   (slide 6 of the attached) and it could be that the soil NOx inventory
   is using a timezone file rather than environmental time.

See slides here:

   https://github.com/geoschem/geos-chem/files/14168607/timezone-slides-19Sept2023.pdf