Enhance TC-DLand to use updated NHC land definition data

[JohnHalleyGotway]

Describe the Enhancement

MET Issue #2550 added this land definition file data/tc_data/v2023-04-07_gdland_table.dat. It is an ASCII representation of distance to land that is read by the TC-Diag Python code in scripts/python/tc_diag. This overlaps with the functionality provided by the TC-DLand tool.

The tasks for this issue include:

• Check with @musgrave-kate in January 2024 to acquire update land definition files in use at NHC.
• Replace the existing aland.dat, wland.dat, and shland.dat data files in the data/tc_data directory with the updated file(s).
• Make any changes necessary in TC-DLand to use the updated datasets.
• Carefully compare the distance to land values between v2023-04-07_gdland_table.dat and the newly generate TC-DLand output and address any differences.
• Regenerate the existing dland_global_tenth_degree.nc and dland_nw_hem_tenth_degree.nc data files using the updated land data file.
• Coordinate with @robertdemariacira to enhance the TC-Diag Python code to use the TC-DLand output rather than v2023-04-07_gdland_table.dat and remove v2023-04-07_gdland_table.dat from the repository.

Time Estimate

3 days?

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None needed.

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Funding Source

Charge NOAA R2O HAFS TnE (2784603)

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  • Requires data from @musgrave-kate
  • Recommend asking @KathrynNewman to test

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[jvigh]

@JohnHalleyGotway @KathrynNewman: Here's the link to the new NHC look up table:
https://rammb-data.cira.colostate.edu/~rdemaria/gdland/v2023-04-07_gdland_table.dat

[JohnHalleyGotway]

As discussed with @KathrynNewman during the HAFS R2O meeting, this work can be done with that funding source and included in the MET-12.0.0 release. The issue has been updated to charge project 2784603.

While doing this, please also update the MET documentation to link to more information about the ATCF file format:
https://ftp.nhc.noaa.gov/atcf/README

And provide a more clear definition of the ADECK, BDECK, EDECK terminology used primarily at NOAA/NHC, as requested by @mkavulich.

[JohnHalleyGotway]

Discussed during the HAFS project meeting on Sept 3, 2024. Once @KathrynNewman locates/provides the updated land data file, @JohnHalleyGotway can update TC-DLand to process it.