NOAA/PSL Catalog https://psl.noaa.gov/thredds/catalog/Datasets/COBE/catalog.html

Dataset Size Last Modified
     Folder  COBE   --
         sst.mon.ltm.1981-2010.nc 4.670 Mbytes 2021-05-10T21:34:49Z
         sst.mon.ltm.1991-2020.nc 4.670 Mbytes 2021-05-10T21:33:40Z
         sst.mon.mean.nc 162.2 Mbytes 2021-09-07T15:15:33Z

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