Atmospheric COCl2 measured by solar occultation spectrometry

Details Atmospheric COCl2 measured by solar occultation spectrometry Atmospheric COCl2 measured by solar occultation spectrometry

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2835t&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 14, p. 2835-2838

Physics

2

Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere-Constituent Transport And Chemistry, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Atmospheric Composition And Structure: Troposphere-Constituent Transport And Chemistry

Scientific paper

Vertical profiles of atmospheric COCl2 (phosgene, carbonyl dichloride) have been measured remotely by the JPL MkIV interferometer during recent balloon flights. The ν5 band of COCl2 in the 830 to 860 cm-1 spectral region was used for the analyses, despite its overlap with the stronger ν4 band of CCl3F. Upper troposphere COCl2 volume mixing ratios of around 20 pptv were retrieved, increasing to 25 pptv by 15 km altitude, in good agreement with previous aircraft measurements made by in situ techniques. At mid-latitudes the COCl2 peaks at around 30 pptv at 22 km altitude, above which it rapidly drops, reaching zero by 28 km altitude.

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