- The 0 - 700 meters layer from 1955 to present
- The 0 - 2000 meters layer from 2005 to present

- The 0 - 700 meters layer from 1955 to 2019
- The 0 - 2000 meters layer from 2005 to 2019

- The 0 - 700 meters layer from 1955-59 - 2015-19
- The 0 - 2000 meters layer from 1955-59 - 2015-19

    File naming conventions:

    [p][ud]-[ld]-[by][ey].dat
     |  |    |    |   |
     |  |    |    |   last two digits of ending year
     |  |    |    last two digits of beginning year
     |  |    lower depth of layer
     |  upper depth of layer
     parameter (hc=heat content)

Note: year 2000 is presented as A0, 2001 is A1, etc.
      year 2010 is presented as B0, 2011 is B1, etc.
      year 2020 is presented as C0, 2021 is C1, etc.