We present vertical column abundances of H2O, N2O, HNO3, NO2, O3, HF, HCl, and ClNO3 determined from solar absorption spectra measured by the JPL MkIV interferometer from the NASA DC-8 aircraft. These observations, taken in 1987 and 1992, covered latitudes ranging from 85¿S to 85¿N. Although most gases display latitude symmetry, large asymmetries in H2O, HNO3, and O3 are apparent, which can be ascribed to processes enhanced by the cooler Antarctic winter temperatures. ¿ American Geophysical Union 1994