Upper limit for stratospheric HBR using far-infrared thermal emission spectroscopy
Article first published online: 7 DEC 2012
Copyright 1992 by the American Geophysical Union.
Geophysical Research Letters
Volume 19, Issue 16, pages 1651–1654, 21 August 1992
How to Cite
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 13 JUL 1992
- Manuscript Received: 22 JUN 1992
We measure an upper limit for stratospheric HBr from three balloon flights. The observations were made with the FIRS-2 far-infrared Fourier transform spectrometer. The 1σ 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 1σ 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 (2σ), but is consistent with (albeit well in excess of) a theoretical estimate which predicts roughly 0.4 pptv at this altitude.