Articles | Volume 18, issue 1
Atmos. Chem. Phys., 18, 327–338, 2018
https://doi.org/10.5194/acp-18-327-2018

Special issue: StratoClim stratospheric and upper tropospheric processes...

Atmos. Chem. Phys., 18, 327–338, 2018
https://doi.org/10.5194/acp-18-327-2018

Research article 11 Jan 2018

Research article | 11 Jan 2018

Heterogeneous reaction of HO2 with airborne TiO2 particles and its implication for climate change mitigation strategies

Daniel R. Moon et al.

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AR by Dwayne Heard on behalf of the Authors (19 Oct 2017)  Author's response    Manuscript
ED: Publish as is (22 Oct 2017) by Allan Bertram
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Short summary
One geoengineering mitigation strategy for global temperature rises is to inject particles into the stratosphere to scatter solar radiation back to space. However, the injection of such particles must not perturb ozone. We measured the rate of uptake of HO2 radicals, an important stratospheric intermediate, onto TiO2 particles. Using the atmospheric model TOMCAT, we showed that surface reactions between HO2 and TiO2 would have a negligible effect on stratospheric concentrations of HO2 and ozone.
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