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Simultaneous, in situ measurements of OH and HO_2 in the stratosphere

Stimpfle, R. M. and Wennberg, P. O. and Lapson, L. B. and Anderson, J. G. (1990) Simultaneous, in situ measurements of OH and HO_2 in the stratosphere. Geophysical Research Letters, 17 (11). pp. 1905-1908. ISSN 0094-8276. doi:10.1029/GL017i011p01905.

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Stratospheric OH and HO_2 radical densities have been measured between 36 and 23 km using a balloon-borne, in situ instrument launched from Palestine, TX 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. HO_2 is detected nearly simultaneously by adding No to the sample flow to convert ambient HO_2 to OH. Observed OH and HO_2 densities ranged from 8.0 ± 2.8 × 10^6 and 1.4 ± 0.5 × 10^7 molec cm^(−3), respectively, at 36 km, to 1.4± 0.5 × 10^6 and 3.0± 1.0 × 10^6 at 23 km, where the uncertainty is ±1σ. The HO_2 density exhibits a maximum in the 34–30 km of 1.7±0.6 × 10^7. The data were obtained over a solar zenith angle variation of 51° at 36 km to 61° at 23 km. O_3 and H_2O densities also were measured simultaneously with separate instruments.

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Wennberg, P. O.0000-0002-6126-3854
Additional Information:© 1990 American Geophysical Union. Received July 12, 1990; accepted August 6, 1990. This flight could not have been carried out without the special assistance on short notice of a large number of individuals : At NASA headquarters, Bob Watson; at NSBF, Danny Ball and the support staff, which provided excellent assistance; and at Harvard, E. Weinstock, J. Demusz, N. Hazen, B. Heroux, T. Schiller, D. Spillane and E. Thompson. Funds provided by NASA contract NASW 3960.
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Issue or Number:11
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ID Code:46593
Deposited By: Ruth Sustaita
Deposited On:01 Jul 2014 17:57
Last Modified:10 Nov 2021 17:27

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