Influences of Air Masses Sampled by the ATom Mission

To help understand recent influences of air masses sampled by an aircraft mission, back trajectories can be a useful tool. I will briefly describe the methods used to calculate trajectories for the ATom mission, including convective and boundary layer influence products. Then I will give an overview of the large-scale features of the different influences of each ATom mission, including the upcoming ATom-3 mission that will be concluded by the time of the meeting. I will also show an example or two of how the trajectory products have been used by ATom investigators.