Abstract
The third‐order rate constants for NaOH + CO2 + M were measured in a flow tube at 298 K. The rate constants for N2 and N2O buffer gases are (1.3±0.3) × 10−28 and (2.9±0.6) × 10−28 cm6 molecule−2 s−1, respectively. We expect the product of this reaction, NaHCO3, to be relatively stable with respect to 0 atom reaction and photolysis and to be a dominant reservoir species for Na in the mesosphere. The association reaction of NaOH with CO2 is at least 40 times faster than NaOH + HCl at all altitudes below the Na layer. Na species will not affect stratospheric ClOx and O3 chemistry.
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