Air mass trajectories are calculated at NILU using the Flextra model developed by Andreas Stohl (NILU) in cooperation with Gerhard Wotawa og Petra Seibert (Institute of Meteorology and Geophysics, Wienna) and using meteorological data provided from ECMWF (European Centre for Medium Range Weather Forcast). Publications using FLEXTRA results are requested to include an acknowledgement of, and citation to ECMWF, NILU and the model developers.

A few EVDC stations are already added to the FLEXTRA trajectory system, see [locations], but please contact us in case you want to access plots and data from other stations, these can be made available upon request. Please follow the link to FLEXTRA backward trajectories to browse this tool.