Nadir Results

Columns of O₃, NO₂, and BrO beneath the aircraft were retrieved from numerous flights throughout the POLARIS campaign. During the POLARIS campaign, the ER-2 was based in Fairbanks, Alaska (64.9$^{\circ }$N, 147.9$^{\circ }$W) and the majority of the flights were north into the Arctic. Flight tracks and altitude profiles for all flights are supplied in Appendix D.