NOAA/ESRL/PSD Catalog http://www.esrl.noaa.gov/psd/thredds/catalog/Datasets/COBE/catalog.html

Dataset Size Last Modified
     Folder  COBE   --
         sst.mon.ltm.1981-2010.nc 1.582 Mbytes 2016-04-06T14:11:33Z
         sst.mon.mean.nc 156.7 Mbytes 2017-07-26T15:16:28Z

NOAA/ESRL/PSD at NOAA ESRL PSD see Info
THREDDS Data Server [Version 4.3.15 - 20121218.1126] Documentation