Backward trajectories estimate air transport pathways for sites in the northeastern United States. The links provided below lead to estimates of a range of 36-hour backward trajectories at starting heights of 500 metres for locations in the northeast. Trajectories shown in black denote air arriving at Underhill, Vermont. Further details on the NOAA HY-SPLIT model (which produces the trajectory estimates), other trajectory options and meteorological forecast and archival products are available from the NOAA Air Resources Laboratory (ARL) Realtime Environmental Applications and Display sYstem (READY) website.
Models run for the summer season provide ground level ozone concentrations.