Articles | Volume 18, issue 1
Atmos. Chem. Phys., 18, 327–338, 2018

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

Atmos. Chem. Phys., 18, 327–338, 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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Cited articles

Aloisio, S. and Francisco, J. S.: Existence of a hydroperoxy and water (HO2 center dot H2O) radical complex, J. Phys. Chem. A, 102, 1899–1902,, 1998. 
Ammann, M., Cox, R. A., Crowley, J. N., Jenkin, M. E., Mellouki, A., Rossi, M. J., Troe, J., and Wallington, T. J.: Evaluated kinetic and photochemical data for atmospheric chemistry: Volume VI – heterogeneous reactions with liquid substrates, Atmos. Chem. Phys., 13, 8045–8228,, 2013. 
Anpo, M., Che, M., Fubini, B., Garrone, E., Giamello, E., and Paganini, M. C.: Generation of superoxide ions at oxide surfaces, Top. Catalys., 8, 189–198,, 1999. 
Bedjanian, Y., Romanias, M. N., and El Zein, A.: Uptake of HO2 radicals on Arizona Test Dust, Atmos. Chem. Phys., 13, 6461–6471,, 2013. 
Brown, R. L.: Tubular flow reactors with 1st-order kinetics, J. Res. Natl. Bureau Stand., 83, 1–8, 1978. 
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.
Final-revised paper