Nitrous oxide vertical profiles and latitudinal distributions for the 1989 AASE and 1992 AASE II northern polar winters are developed from the ATLAS N2O dataset, using both potential temperature and pressure as vertical coordinates. Morphologies show strong descent occurring poleward of the polar jet. The AASE II morphology shows a mid latitude of ''surf zone,'' characterized by strong horizontal mixing, and a horizontal gradient south of 30¿N due to the sub-tropical jet. These features are similar to those produced by two-dimensional photochemical models which include coupling between transport radiation and chemistry. ¿ American Geophysical Union 1993