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Simultaneous, in situ measurements of OH and HO2 in the stratosphereStratospheric OH and HO2 radical densities have been measured between 36 and 23 km using a balloon-borne, in situ instrument launched from Palestine, Texas on August 25, 1989. OH is detected using the laser-induced fluorescence technique (LIF) employing a Cu-vapor-laser pumped dye laser coupled with an enclosed-flow detection chamber. HO2 is detected nearly simultaneously by adding NO to the sample flow to convert ambient HO2 to OH. Observed OH and HO2 densities ranged from 8.0 + or - 2.8 x 10 to the 6th and 1.4 + or - 0.5 x 10 to the 7th molec/cu cm, respectively, at 36 km, to 1.4 + or - 0.5 x 10 to the 6th and 3.0 + or - 1.0 x 10 to the 6th at 23 km, where the uncertainty is + or - sigma. The HO2 density exhibits a maximum in the 34-30 km region of 1.7 + or - 0.6 x 10 to the 7th. The data were obtained over a solar zenith angle variation of 51 deg at 36 km to 61 deg at 23 km. O3 and H2O densitites also were measured simultaneously with separate instruments.
Document ID
19910026453
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Stimpfle, R. M.
(Harvard Univ. Cambridge, MA, United States)
Wennberg, P. O.
(Harvard Univ. Cambridge, MA, United States)
Lapson, L. B.
(Harvard Univ. Cambridge, MA, United States)
Anderson, J. G.
(Harvard University Cambridge, MA, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1990
Publication Information
Publication: Geophysical Research Letters
Volume: 17
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
91A11076
Funding Number(s)
CONTRACT_GRANT: NASW-3960
Distribution Limits
Public
Copyright
Other

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