NOAA/PSL Catalog https://psl.noaa.gov/thredds/catalog/Datasets/icoads/2degree/catalog.html

Dataset Size Last Modified
     Folder  2degree   --
         Folder  LTMs1950-1979/   --
         Folder  LTMs1971-2000/   --
         Folder  LTMs1981-2010/   --
         Folder  LTMs1991-2020/   --
         Folder  enh/   --
         Folder  std/   --

NOAA/PSL at NOAA PSL see Info
THREDDS Data Server [Version 4.6.15-SNAPSHOT - 2020-01-28T04:01:10+0000] Documentation