Search for IPY data. Use the links on the left hand side to access pages for setting search conditions. Then use the menu below to view results. Initially, only directory level datasets are shown. For each directory level dataset containing files on a second level, there is a small [+] button that may be used to show metadata about the files.
The catalogue contains information about datasets as well as references to actual data which are available through a THREDDS Data Server. Always remember to cite data providers when using data. It is good practise to contact the PI listed for each dataset prior to using it.