Upper limit for stratospheric HBr using far-infrared thermal emission spectroscopy

Details Upper limit for stratospheric HBr using far-infrared thermal emission spectroscopy Upper limit for stratospheric HBr using far-infrared thermal emission spectroscopy

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.1651t&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 16, Aug. 21, 1992, p. 1651-1654.

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12

Atmospheric Composition, Far Infrared Radiation, Hydrobromides, Stratosphere, Thermal Emission, Midlatitude Atmosphere, Ozone Depletion

Scientific paper

An upper limit is measured for stratospheric HBr from three balloon flights. The observations were made with the FIRS-2 far-infrared Fourier transform spectrometer. The 1sigma upper limits from the 1988, 1989, and 1990 balloon flights are 13 pptv at 35 km, 7 pptv at 32 km, and 3 pptv at 31 km, respectively. Combining all 3 flights, the weighted average 1sigma upper limit for HBr is 4 pptv at 32 km. This value is significantly smaller than the only other previously published spectroscopic value of 20 +/- 7 pptv (2sigma), but is consistent with a theoretical estimate which predicts roughly 0.4 pptv at this altitude.

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