Abstract
The flash photolysis‐resonance fluorescence technique has been utilized to measure the rate constants for the reactions of chlorine nitrate (ClONO2) 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−3molecule−1s−1 are: O(³P) + ClONO2 → Products, k1 = (2.0 ± 0.2) × 10−13; OH + ClONO2 → Products, k2 = (3.7 ± 0.2) × 10−13.The above results, coupled with the photolysis rate of ClONO2, indicate that these chemical degradation pathways contribute less than 10% to the removal of ClONO2 in the stratosphere.
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