Latitude variations of stratospheric trace gases

Physics

Scientific paper

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Absorption Spectra, Abundance, Air Pollution, Air Sampling, Atmospheric Chemistry, Latitude Measurement, Polar Regions, Stratosphere, Trace Contaminants, Variations, Vertical Distribution, Airborne Equipment, Dc 8 Aircraft, Fourier Transformation, Infrared Spectrometers, Pollution Monitoring, Remote Sensing, Solar Spectra

Scientific paper

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 deg S to 85 deg 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 colder Antarctic winter temperatures.

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