Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 16, issue 15
Articles | Volume 16, issue 15
https://doi.org/10.5194/acp-16-9579-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-16-9579-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 16, issue 15
Research article
 | 
02 Aug 2016
Research article |  | 02 Aug 2016

Hydroxyl radical in/on illuminated polar snow: formation rates, lifetimes, and steady-state concentrations

Zeyuan Chen, Liang Chu, Edward S. Galbavy, Keren Ram, and Cort Anastasio

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Short summary
We made the first measurements of the concentrations of hydroxyl radical (•OH), a dominant environmental oxidant, in snow grains. Concentrations of •OH in snow at Summit, Greenland, are comparable to values reported for midlatitude cloud and fog drops, even though impurity levels in the snow are much lower. At these concentrations, the lifetimes of organics and bromide in Summit snow are approximately 3 days and 7 h, respectively, suggesting that OH is a major oxidant for both species.
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