A study of the chemical degradation of ClONO 2  in the stratosphere | Zendy

Ravishankara A. R. | Zendy; Davis D. D. | Zendy; Smith G. | Zendy; Tesi G. | Zendy; Spencer J. | Zendy

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A study of the chemical degradation of ClONO 2 in the stratosphere

Author(s) -

Ravishankara A. R.,

Davis D. D.,

Smith G.,

Tesi G.,

Spencer J.

Publication year - 1977

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl004i001p00007

Subject(s) - stratosphere , reaction rate constant , flash photolysis , photodissociation , radical , torr , chemical reaction , chemistry , analytical chemistry (journal) , photochemistry , kinetics , thermodynamics , environmental chemistry , atmospheric sciences , physics , organic chemistry , quantum mechanics

The flash photolysis‐resonance fluorescence technique has been utilized to measure the rate constants for the reactions of chlorine nitrate (ClONO 2 ) with two stratospheric radicals, O(³P) and OH. Both rate constants were measured at a pressure of 20 Torr and a temperature of 245 K. The reactions with their corresponding rate constant in units of cm −3 molecule −1 s −1 are: O(³P) + ClONO 2 → Products, k 1 = (2.0 ± 0.2) × 10 −13 ; OH + ClONO 2 → Products, k 2 = (3.7 ± 0.2) × 10 −13 . The above results, coupled with the photolysis rate of ClONO 2 , indicate that these chemical degradation pathways contribute less than 10% to the removal of ClONO 2 in the stratosphere.

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