This dataset depends on the following independent variable (i.e, grid):
grid: /P (mb) ordered [ (962.5) (887.5) (775.0) (650.0) (550.0) (450.0) (350.0)] :grid
so there will be 7 links below for the different files.
You may want to get a utility like wget which can download sets of files. For example (all one line)
wget -r -l2 -nd --no-parent -e robots=off -v --relative 'http://digilib.icpac.net/SOURCES/.NOAA/.NCEP-NCAR/.CDAS-1/.MONTHLY/.Intrinsic/PressureLevel/rhum/yearly-climatology/P+differences/%5BT+%5Dminover/downloadsarcinfo.html'
single quotes are necessary in unix to protect the url from expansion; probably necessary in other cases as well
| 962.5 mb | |
|---|---|
| 887.5 mb | |
| 775.0 mb | |
| 650.0 mb | |
| 550.0 mb | |
| 450.0 mb | |
| 350.0 mb | |