Stratospheric HBr mixing ratio obtained from far infrared emission spectra

Details Stratospheric HBr mixing ratio obtained from far infrared emission spectra Stratospheric HBr mixing ratio obtained from far infrared emission spectra

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..787p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Aug. 1989, p. 787-790.

Physics

18

Emission Spectra, Far Infrared Radiation, Hydrobromic Acid, Ozone Depletion, Stratosphere, Balloon-Borne Instruments, Fourier Transformation, High Resolution, Reaction Kinetics, Signal To Noise Ratios

Scientific paper

Emission features of HBr isotopes have been identified in high-resolution FIR emission spectra obtained with a balloon-borne Fourier-transform spectrometer in the spring of 1979 at 32 deg N latitude. When six single-scan spectra at a zenith angle of 93.2 deg were averaged, two features of HBr isotopes at 50.054 and 50.069/cm were obtained with a signal-to-noise ratio of 2.5. The volume mixing ratio retrieved from the average spectrum is 2.0 x 10 to the -11th, which is assumed to be constant above 28 km, with an uncertainty of 35 percent. This stratospheric amount of HBr is about the same as the current level of tropospheric organic bromine compounds, 25 pptv. Thus HBr could be the major stratospheric bromine species.

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