Physics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9513819s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Aug. 20, 1990, p. 13819-13827.
Physics
24
Atmospheric Chemistry, Atmospheric Composition, Nitrogen Oxides, Stratosphere, Absorption Spectra, Diurnal Variations, Photolysis, Reaction Kinetics, Sunrise, Vertical Distribution
Scientific paper
New ground-based measurements of NO3 absorption in the band near 662 nm were carried out using the moon as a light source during sunrise on July 1, 1988. As the sun rose, the observed slant column abundance of atmospheric NO3 decreased systematically. This time-dependent decrease is expected, due to the progression of the solar terminator down through the atmosphere, and provides a basis for inferring the nighttime vertical profile of NO3. This approach represents a new means of measuring the vertical profile of stratospheric species whose distributions change rapidly at sunrise. The profile inferred from the time-dependent NO3 decrease is sensitive to the NO3 absorption cross section and the adopted photolysis rate, and these sensitivities are investigated. The inferred vertical profile on July 1, 1988, is in excellent agreement with theoretical predictions in the altitude range from about 20 to 33 km.
Smith Joseph P.
Solomon Susan
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