Khosrawi, Farah

Kirner, Oliver

Müller, Rolf

Ruhnke, Roland

Weimer, Michael

English

KITopen

Geophysical Research AbstractsVol. 19, EGU2017-12987-1, 2017EGU General Assembly 2017© Author(s) 2017. CC Attribution 3.0 License.Contribution of different PSC types to Arctic ozone depletion caused bychlorine activation and denitrificationOliver Kirner (1), Farah Khosrawi (2), Rolf Müller (3), Michael Weimer (1), and Roland Ruhnke (2)(1) Karlsruhe Institute of Technology (KIT), Steinbuch Centre for Computing (SCC), Karlsruhe, Germany, (2) KarlsruheInstitute of Technology (KIT), Institute for Meteorology and Climate Research (IMK), Karlsruhe, Germany, (3) ResearchCentre Jülich, Institute of Energy and Climate Research – Stratosphere (IEK-7), Jülich, GermanyHeterogeneous reactions on the surfaces of PSC particles and denitrification of the stratosphere are the causefor polar ozone depletion in spring. In a former study we investigated the impact of different types of PSCs onAntarctic ozone depletion with the help of the chemistry-climate model ECHAM5/MESSy Atmospheric chemistry(EMAC). In this study, we investigate the impact of PSCs on Arctic ozone loss.One standard and four sensitivity EMAC simulations (nudged with ERA-Interim) have been performed toevaluate the contribution of liquid, NAT and ice particles to ozone depletion in the Arctic winters 2010/2011 and2015/2016 due to chlorine activation by heterogeneous chemistry on their surfaces and due to denitrification ofthe stratosphere.In the first three sensitivity simulations, we changed the heterogeneous chemistry on PSC particles byswitching on and off the chemistry on liquid, NAT and ice particles. One further sensitivity simulation withoutNAT formation (only liquid and ice particles) was performed to evaluate the contribution of NAT to Arctic ozonedepletion due to denitrification of the stratosphere.With the help of these different EMAC simulations, we will show the significance of liquid, NAT and iceparticles to Arctic ozone depletion caused by chlorine activation and denitrification.

Contribution of different PSC types to Arctic ozone depletion caused by chlorine activation and denitrification

https://publikationen.bibliothek.kit.edu/1000085757/17133355

Contribution of different PSC types to Arctic ozone depletion caused by chlorine activation and denitrification

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