skt = 4xDaily SST/Land Skin Temperature
http://dl.tpac.org.au/thredds/ncss/ncep1/surface_gauss/skt.sfc.gauss/skt.sfc.gauss.1955.nc?latitude=&longitude=&time_start=1955-01-01T00%3A00%3A00Z&time_end=1955-12-31T18%3A00%3A00Z&accept=xml