Chemical chhange in the arctic vortex during AASE 2

Details Chemical chhange in the arctic vortex during AASE 2 Chemical chhange in the arctic vortex during AASE 2

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2595t&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 23, p. 2595-2598

Physics

8

Absorption Spectra, Abundance, Air Pollution, Air Sampling, Arctic Regions, Atmospheric Chemistry, Atmospheric Circulation, Exhaust Emission, Meteorology, Pollution Monitoring, Spectroscopic Analysis, Stratosphere, Airborne Equipment, Dc 8 Aircraft, Fourier Analysis, Hydrochloric Acid, Hydrofluoric Acid, Infrared Spectrometers, Ozone, Spectrum Analysis, Thermal Emission, Trace Contaminants, Water Vapor

Scientific paper

We measured column abundances of HF, HCl, O3, HNO3, and H2O on the NASA DC-8 during the AASE II campaign, using thermal emission spectroscopy. We made multiple traversals of the Arctic vortex and surroundings. Using HF as a tracer, we remove the effects of subsidence from the measured column abundances; perturbations in the resulting column abundances are attributed to chemical processing. We find that by January 1992 the stratospheric column in the vortex had been chemically depleted by about (55+/-10)% in HCl and (35+/-10)% in O3, and enhanced by about (15+/-10)% in HNO3 and (0+/-10)% in H2O.

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