Seasonal variations in high-latitude ozone and metastable molecular oxygen emissions - A theoretical interpretation

Physics

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Airglow, Annual Variations, Molecular Gases, Optical Measurement, Oxygen, Ozone, Polar Regions, Atmospheric Models, Infrared Spectra, Photochemical Reactions, Remote Sensors, Satellite-Borne Instruments, Stratosphere, Temperature Effects, Water Vapor

Scientific paper

Comparison of photochemical calculations of atmospheric ozone between 40 and 55 km with measurements from a satellite-borne remote sensor shows agreement in the high-latitude summer hemisphere. However, in the sunlit high-latitude winter, the available data imply either a smaller water vapor mixing ratio than generally accepted or a temperature 15 - 20 K colder than contained in published model atmospheres. As with the ozone data the infrared emission in winter implies an odd oxygen loss rate smaller than predicted on the basis of standard water vapor and temperature models. The magnitude of the 1.27 micron signals and their consistency with upper stratospheric ozone data cast doubt on the large mesospheric ozone abundances deduced in independent experiments.

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