Several of the YOPP modelling teams have been working on extraction of data over YOPP supersites. Information from two models in the Arctic, ARPEGE and ECCC-CAPS are now available in NetCDF/CF through a THREDDS Data Server. Work is in progress to make these data searchable through the YOPP catalogue. The data is available at http://thredds.met.no/thredds/catalog/alertness/YOPP_supersite/catalog.html.

A working group has been identifying YOPP supersites where numerical simualtions can be compared with extensive observations. Background material is provided in the YOPP supersite Model Intercomparison project (YOPPSiteMIP) paper.

PANGAEA is hosting YOPP data. Information on these datasets are regularly harvested from the YOPP Data Portal and ingested. YOPP datasets hosted by PANGAEA are attached to the YOPP project which is available at https://www.pangaea.de/?f.project=YOPP. Several of the datasets have parent/child relationships. Maintenance of these parent/child relationships is attempted in the searchable YOPP catalog.

British Antarctic Survey (BAS) is collecting radiosonde data that were produced during YOPP Southern Hemisphere Special Observing Period (SOP). These data are stored on a FTP server by BAS which is available at ftp://ftp.bas.ac.uk/src/YOPP-SH/radiosondes/.