NOAA/ESRL/PSD Catalog http://esrl.noaa.gov/psd/thredds/catalog/Datasets/ncep.reanalysis.derived/tropopause/catalog.html

Dataset Size Last Modified
     Folder  tropopause   --
         air.mon.inter.std.nc 507.4 Kbytes 2013-04-17T20:09:38Z
         air.mon.intra.std.nc 507.4 Kbytes 2013-04-17T21:29:32Z
         air.mon.ltm.nc 760.3 Kbytes 2011-10-12T18:43:48Z
         air.mon.mean.nc 16.59 Mbytes 2013-05-02T23:06:07Z
         air.tropp.4Xday.1981-2010.ltm.nc 92.12 Mbytes 2011-10-12T18:36:38Z
         air.tropp.4Xday.ltm.nc 92.12 Mbytes 2011-10-12T18:36:38Z
         air.tropp.day.1981-2010.ltm.nc 23.03 Mbytes 2011-07-28T19:23:09Z
         air.tropp.day.ltm.nc 23.03 Mbytes 2011-07-28T19:23:09Z
         air.tropp.mon.1968-1996.ltm.nc 507.5 Kbytes 2010-10-25T21:03:22Z
         air.tropp.mon.1981-2010.ltm.nc 760.3 Kbytes 2011-10-12T18:43:48Z
         air.tropp.mon.ltm.nc 760.3 Kbytes 2011-10-12T18:43:48Z
         air.tropp.mon.mean.nc 16.59 Mbytes 2013-05-02T23:06:07Z
         pres.mon.inter.std.nc 507.4 Kbytes 2013-04-17T20:09:43Z
         pres.mon.intra.std.nc 507.3 Kbytes 2013-04-17T21:29:37Z
         pres.mon.ltm.nc 760.3 Kbytes 2011-10-12T18:43:48Z
         pres.mon.mean.nc 16.59 Mbytes 2013-05-02T23:06:08Z
         pres.tropp.4Xday.1981-2010.ltm.nc 92.12 Mbytes 2011-10-12T18:36:49Z
         pres.tropp.4Xday.ltm.nc 92.12 Mbytes 2011-10-12T18:36:49Z
         pres.tropp.day.1981-2010.ltm.nc 23.03 Mbytes 2011-07-28T19:23:10Z
         pres.tropp.day.ltm.nc 23.03 Mbytes 2011-07-28T19:23:10Z
         pres.tropp.mon.1968-1996.ltm.nc 507.5 Kbytes 2010-10-25T21:03:24Z
         pres.tropp.mon.1981-2010.ltm.nc 760.3 Kbytes 2011-10-12T18:43:48Z
         pres.tropp.mon.ltm.nc 760.3 Kbytes 2011-10-12T18:43:48Z
         pres.tropp.mon.mean.nc 16.59 Mbytes 2013-05-02T23:06:08Z

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