Spectroscopic observations of atmospheric trace gases over Kitt Peak. III - Long-term trends of hydrogen chloride and hydrogen fluoride from 1978 to 1990

Details Spectroscopic observations of atmospheric trace gases over Kitt Peak. III - Long-term trends of hydrogen chloride and hydrogen fluoride from 1978 to 1990 Spectroscopic observations of atmospheric trace gases over Kitt Peak. III - Long-term trends of hydrogen chloride and hydrogen fluoride from 1978 to 1990

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9615513w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Aug. 20, 1991, p. 15,513-15,521. Research supported by DOE and NSF.

Physics

15

Atmospheric Composition, Halides, Infrared Spectroscopy, Spectrum Analysis, Trace Contaminants, Fluorides, Hydrofluoric Acid, Hydrogen Chlorides, Solar Spectra

Scientific paper

Solar spectra obtained with a 1-m Fourier-transform spectrometer and 13.5-m spectrograph on Kitt Peak are analyzed for absorption by hydrogen chloride and hydrogen fluoride. It is shown that hydrogen-chloride and hydrogen-fluoride column amounts are increased more or less linearly by factors of about two and three, respectively, over a 12-year period of observations. These fractional increases are found to be comparable to the published increases in the ground-level concentrations of halocarbons. It is noted that a close correlation between hydrogen-chloride and hydrogen-fluoride amounts points to a single mechanism that is primarily responsible for the variability of the gases. Excess amounts and large variability at times correlated with volcanic ash clouds are found in few observations in the hydrogen-chloride and hydrogen-fluoride time series.

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