The majority of long-term data (e.g., EMEP and GAW programmes) have their repository with NILU (Norwegian Institute for Air Research), where there is vision and established funding mechanisms to ensure long-term storage of data. Of much more concern is the potential volatility of field campaign data. For individual projects, NILU has also included campaign data in their database (NILU has hosted observational databases for more than 50 EC projects during FP5-FP7). This activity should be enhanced in order to ensure long-term data security also for campaign data. An added benefit here will be the harmonized data and metadata structure, which make the data substantially more attractive to modellers. ACCENT-Plus will therefore collaborate with NILU, which will be an ACCENT-Plus associate, in data storage of campaign data.