Articles | Volume 16, issue 24
https://doi.org/10.5194/acp-16-15593-2016
https://doi.org/10.5194/acp-16-15593-2016
Research article
 | 
19 Dec 2016
Research article |  | 19 Dec 2016

Nighttime atmospheric chemistry of iodine

Alfonso Saiz-Lopez, John M. C. Plane, Carlos A. Cuevas, Anoop S. Mahajan, Jean-François Lamarque, and Douglas E. Kinnison

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Short summary
Electronic structure calculations are used to survey possible reactions that HOI and I2 could undergo at night in the lower troposphere, and hence reconcile measurements and models. The reactions NO3 + HOI and I2 + NO3 are included in two models to explore a new nocturnal iodine radical activation mechanism, leading to a reduction of nighttime HOI and I2. This chemistry can have a large impact on NO3 levels in the MBL, and hence upon the nocturnal oxidizing capacity of the marine atmosphere.
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