The CEOP (Coordinated Enhanced Observing Period) data management responsibility is covered by three thematically distinguished archives: The University of Tokyo stores satellite data, the CEOP Data Archive (CDA) at the University Corporation for Atmospheric Research/Joint Office for Science Support (UCAR/JOSS) stores the reference site data and the World data Center for Climate (WDCC) archives the model output data for CEOP (http://www.joss.ucar.edu/ghp/ceopdm/). CEOP is defined for the period from July 2001 until December 2004. Model data from ten different National Weather Prediction Centers (NWP) are collected, harmonised and disseminated by web access (http://www.mad.zmaw.de/CEOP/ceop_overview.html) by the WDCC.

The CEOP model data archive is integrated into the standard archive environment of the World Data Center for Climate. The WDCC provides web access to 70 TB climate model and related data (http://www.mad.zmaw.de/wdcc/). The total mass storage archive contains more than 2 PB.