This is an inefficient format, so be warned: you are going to get a datafile.
The IRI FD ECHAM4p5 Forecast ca_sst ensemble24 SIX-HOURLY jun2008 top shortwave radiation upward (top) 0000 1 Jun 2008 data are available as a columnar table, i.e. as multiple columns of data, intended primarily to be read. However, if you have other intentions for this table, or simply do not like the default choices, you may want to choose from the columnar tables with options.