Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere

P. O. Wennberg, T. F. Hanisco, L. Jaeglé, D. J. Jacob, E. J. Hintsa, E. J. Lanzendorf, J. G. Anderson, R. S. Gao, E. R. Keim, S. G. Donnelly, L. A. Del Negro, D. W. Fahey, S. A. McKeen, R. J. Salawitch, C. R. Webster, R. D. May, R. L. Herman, M. H. Proffitt, J. J. Margitan, Elliot L Atlas & 4 others S. M. Schauffler, F. Flocke, C. T. McElroy, T. P. Bui

Research output: Contribution to journalArticle

271 Citations (Scopus)

Abstract

The concentrations of the hydrogen radicals OH and HO2 in the middle and upper troposphere were measured simultaneously with those of NO, O3, CO, H2O, CH4, non-methane hydrocarbons, and with the ultraviolet and visible radiation field. The data allow a direct examination of the processes that produce O3 in this region of the atmosphere. Comparison of the measured concentrations of OH and HO2 with calculations based on their production from water vapor, ozone, and methane demonstrate that these sources are insufficient to explain the observed radical concentrations in the upper troposphere. The photolysis of carbonyl and peroxide compounds transported to this region from the lower troposphere may provide the source of HO(x) required to sustain the measured abundances of these radical species. The mechanism by which NO affects the production of O3 is also illustrated by the measurements. In the upper tropospheric air masses sampled, the production rate for ozone (determined from the measured concentrations of HO2 and NO) is calculated to be about 1 part per billion by volume each day. This production rate is faster than previously thought and implies that anthropogenic activities that add NO to the upper troposphere, such as biomass burning and aviation, will lead to production of more O3 than expected.

Original languageEnglish (US)
Pages (from-to)49-53
Number of pages5
JournalScience
Volume279
Issue number5347
DOIs
StatePublished - Jan 2 1998
Externally publishedYes

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troposphere
hydrogen
nitrogen
ozone
nonmethane hydrocarbon
biomass burning
photolysis
air mass
water vapor
human activity
methane
atmosphere
rate

ASJC Scopus subject areas

  • General

Cite this

Wennberg, P. O., Hanisco, T. F., Jaeglé, L., Jacob, D. J., Hintsa, E. J., Lanzendorf, E. J., ... Bui, T. P. (1998). Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere. Science, 279(5347), 49-53. https://doi.org/10.1126/science.279.5347.49

Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere. / Wennberg, P. O.; Hanisco, T. F.; Jaeglé, L.; Jacob, D. J.; Hintsa, E. J.; Lanzendorf, E. J.; Anderson, J. G.; Gao, R. S.; Keim, E. R.; Donnelly, S. G.; Del Negro, L. A.; Fahey, D. W.; McKeen, S. A.; Salawitch, R. J.; Webster, C. R.; May, R. D.; Herman, R. L.; Proffitt, M. H.; Margitan, J. J.; Atlas, Elliot L; Schauffler, S. M.; Flocke, F.; McElroy, C. T.; Bui, T. P.

In: Science, Vol. 279, No. 5347, 02.01.1998, p. 49-53.

Research output: Contribution to journalArticle

Wennberg, PO, Hanisco, TF, Jaeglé, L, Jacob, DJ, Hintsa, EJ, Lanzendorf, EJ, Anderson, JG, Gao, RS, Keim, ER, Donnelly, SG, Del Negro, LA, Fahey, DW, McKeen, SA, Salawitch, RJ, Webster, CR, May, RD, Herman, RL, Proffitt, MH, Margitan, JJ, Atlas, EL, Schauffler, SM, Flocke, F, McElroy, CT & Bui, TP 1998, 'Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere', Science, vol. 279, no. 5347, pp. 49-53. https://doi.org/10.1126/science.279.5347.49
Wennberg PO, Hanisco TF, Jaeglé L, Jacob DJ, Hintsa EJ, Lanzendorf EJ et al. Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere. Science. 1998 Jan 2;279(5347):49-53. https://doi.org/10.1126/science.279.5347.49
Wennberg, P. O. ; Hanisco, T. F. ; Jaeglé, L. ; Jacob, D. J. ; Hintsa, E. J. ; Lanzendorf, E. J. ; Anderson, J. G. ; Gao, R. S. ; Keim, E. R. ; Donnelly, S. G. ; Del Negro, L. A. ; Fahey, D. W. ; McKeen, S. A. ; Salawitch, R. J. ; Webster, C. R. ; May, R. D. ; Herman, R. L. ; Proffitt, M. H. ; Margitan, J. J. ; Atlas, Elliot L ; Schauffler, S. M. ; Flocke, F. ; McElroy, C. T. ; Bui, T. P. / Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere. In: Science. 1998 ; Vol. 279, No. 5347. pp. 49-53.
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AU - Wennberg, P. O.

AU - Hanisco, T. F.

AU - Jaeglé, L.

AU - Jacob, D. J.

AU - Hintsa, E. J.

AU - Lanzendorf, E. J.

AU - Anderson, J. G.

AU - Gao, R. S.

AU - Keim, E. R.

AU - Donnelly, S. G.

AU - Del Negro, L. A.

AU - Fahey, D. W.

AU - McKeen, S. A.

AU - Salawitch, R. J.

AU - Webster, C. R.

AU - May, R. D.

AU - Herman, R. L.

AU - Proffitt, M. H.

AU - Margitan, J. J.

AU - Atlas, Elliot L

AU - Schauffler, S. M.

AU - Flocke, F.

AU - McElroy, C. T.

AU - Bui, T. P.

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N2 - The concentrations of the hydrogen radicals OH and HO2 in the middle and upper troposphere were measured simultaneously with those of NO, O3, CO, H2O, CH4, non-methane hydrocarbons, and with the ultraviolet and visible radiation field. The data allow a direct examination of the processes that produce O3 in this region of the atmosphere. Comparison of the measured concentrations of OH and HO2 with calculations based on their production from water vapor, ozone, and methane demonstrate that these sources are insufficient to explain the observed radical concentrations in the upper troposphere. The photolysis of carbonyl and peroxide compounds transported to this region from the lower troposphere may provide the source of HO(x) required to sustain the measured abundances of these radical species. The mechanism by which NO affects the production of O3 is also illustrated by the measurements. In the upper tropospheric air masses sampled, the production rate for ozone (determined from the measured concentrations of HO2 and NO) is calculated to be about 1 part per billion by volume each day. This production rate is faster than previously thought and implies that anthropogenic activities that add NO to the upper troposphere, such as biomass burning and aviation, will lead to production of more O3 than expected.

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