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

Dataset Size Last Modified
     Folder  COBE   --
         sst.mon.1991-2020.ltm.nc 4.670 Mbytes 2021-02-09T15:56:29Z
         sst.mon.ltm.1981-2010.nc 1.582 Mbytes 2020-04-13T14:28:18Z
         sst.mon.mean.nc 161.5 Mbytes 2021-02-08T16:51:41Z

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