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

Dataset Size Last Modified
     Folder  ghcncams   --
         Folder  Derived/   --
         air.mon.mean.nc 406.4 Mbytes 2013-05-14T15:56:13Z

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