Articles | Volume 15, issue 20
Atmos. Chem. Phys., 15, 11461–11476, 2015
https://doi.org/10.5194/acp-15-11461-2015
Atmos. Chem. Phys., 15, 11461–11476, 2015
https://doi.org/10.5194/acp-15-11461-2015

Research article 16 Oct 2015

Research article | 16 Oct 2015

The impacts of volcanic aerosol on stratospheric ozone and the Northern Hemisphere polar vortex: separating radiative-dynamical changes from direct effects due to enhanced aerosol heterogeneous chemistry

S. Muthers et al.

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Short summary
After volcanic eruptions different radiative and chemical processes take place in the stratosphere which perturb the ozone layer and cause pronounced dynamical changes. In idealized chemistry-climate model simulations the importance of these processes and the modulating role of the climate state is analysed. The chemical effect strongly differs between a preindustrial and present-day climate, but the effect on the dynamics is weak. Radiative processes dominate the dynamics in all climate states.
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