addfile("http://iridl.ldeo.columbia.edu/SOURCES/.IGOSS/.nmc/.Reyn_SmithOIv1/.monthly/.ssta/yearly-climatology/X+integral/%5BT+%5Ddetrend-bfl/T+integral/%5BX+Y+%5Ddetrend-bfl/%5BY+%5Ddetrend-bfl/Y+differences/Y+partial/X+differences/T+differences/%5BX+Y+%5Ddetrend-bfl/X+differences/%5BY+%5Ddetrend-bfl/%5BY+%5Ddetrend-bfl/dods","r")If you have questions, comments, or problems please use the help@iri link. This page will evolve as we learn more about how NCL handles data downloads, and your help pointing out problems is much appreciated.
*DODS (a.k.a. OpenDAP) is not necessarily installed in NCL and if OpenDAP is not installed, giving NCL a URL instead of a local file name will result in a file-not-found error. In that case, you can use addfile after you download the netcdf file.