Redetermination of the rate coefficient for the reaction of O(1D) with N2

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Read Full Article (file size: 174367 bytes) Cited by GEOPHYSICAL RESEARCH LETTERS, VOL. 29, NO. 15, 1745, doi:10.1029/2002GL014850, 2002 Redetermination of the rate coefficient for the reaction of O(¹D) with N₂ A. R. Ravishankara NOAA, Aeronomy Laboratory, Boulder, CO, USA E. J. Dunlea NOAA, Aeronomy Laboratory, Boulder, CO, USA M. A. Blitz School of Chemistry, University of Leeds, Leeds, UK T. J. Dillon School of Chemistry, University of Leeds, Leeds, UK D. E. Heard School of Chemistry, University of Leeds, Leeds, UK M. J. Pilling School of Chemistry, University of Leeds, Leeds, UK R. S. Strekowski School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA J. M. Nicovich School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA P. H. Wine School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA Abstract The rate coefficient for the reaction of O(¹D) with N₂ at 295 K has been measured in three laboratories to be 3.1 × 10⁻¹¹ cm³ molecule⁻¹ s⁻¹, with an uncertainty of 10% at the 95% confidence level, and to be 2.1 × 10⁻¹¹ exp {(115 ± 10) /T} cm³ molecule⁻¹ s⁻¹ as a function of temperature. (The quoted uncertainty in E/R will allow calculation of the uncertainty in the rate constant at various temperatures.) The implications of this finding are to decrease the calculated OH production rate via the reaction of O(¹D) with H₂O in the atmosphere by roughly 15% in the mid-troposphere and above and to greatly reduce the uncertainties in the calculated HO_x and NO_x production rates in the atmosphere. Published 14 August 2002. Index Terms: 0365 Atmospheric Composition and Structure: Troposphere—composition and chemistry; 0340 Atmospheric Composition and Structure: Middle atmosphere—composition and chemistry; 0317 Atmospheric Composition and Structure: Chemical kinetic and photochemical properties. Read Full Article (file size: 174367 bytes) Cited by Citation: Ravishankara, A. R., E. J. Dunlea, M. A. Blitz, T. J. Dillon, D. E. Heard, M. J. Pilling, R. S. Strekowski, J. M. Nicovich, and P. H. Wine (2002), Redetermination of the rate coefficient for the reaction of O(¹D) with N₂, Geophys. Res. Lett., 29(15), 1745, doi:10.1029/2002GL014850. Copyright 2002 by the American Geophysical Union.

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