Articles | Volume 19, issue 7
https://doi.org/10.5194/acp-19-4917-2019
https://doi.org/10.5194/acp-19-4917-2019
Research article
 | 
11 Apr 2019
Research article |  | 11 Apr 2019

pH-dependent production of molecular chlorine, bromine, and iodine from frozen saline surfaces

John W. Halfacre, Paul B. Shepson, and Kerri A. Pratt

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Cited articles

Abbatt, J., Oldridge, N., Symington, A., Chukalovskiy, V., McWhinney, R. D., Sjostedt, S., and Cox, R. A.: Release of Gas-Phase Halogens by Photolytic Generation of OH in Frozen Halide-Nitrate Solutions: An Active Halogen Formation Mechanism, J. Phys. Chem. A, 114, 6527–6533, https://doi.org/10.1021/jp102072t, 2010. 
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Artiglia, L., Edebeli, J., Orlando, F., Chen, S., Lee, M.-T., Corral Arroyo, P., Gilgen, A., Bartels-Rausch, T., Kleibert, A., Vazdar, M., Andres Carignano, M., Francisco, J. S., Shepson, P. B., Gladich, I., and Ammann, M.: A surface-stabilized ozonide triggers bromide oxidation at the aqueous solution-vapour interface, Nat. Commun., 8, 700, https://doi.org/10.1038/s41467-017-00823-x, 2017. 
Barrie, L. and Platt, U.: Arctic tropospheric chemistry: an overview, Tellus B, 49, 450–454, https://doi.org/10.1034/j.1600-0889.49.issue5.2.x, 1997. 
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Short summary
In this study, we found that a chemical called hydroxyl radical can help create chlorine, bromine, and iodine (i.e., halogens) from acidic frozen imitation seawater. Even more halogens are created if we also add ozone. This result helps our understanding of how halogens are released from the frozen Arctic ice and snow into the atmosphere, where they alter the atmosphere's oxidation ability.
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