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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-507
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
06 Jul 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
Climate Impact of Polar Mesospheric and Stratospheric Ozone Losses due to Energetic Particle Precipitation
Katharina Meraner and Hauke Schmidt Max Planck Institute for Meteorology, Bundesstraße 53, 20146 Hamburg, Germany
Abstract. Energetic particles enter the polar atmosphere and enhance the production of nitrogen oxides and hydrogen oxides in the winter stratosphere and mesosphere. Both components are powerful ozone destroyers. Recently, it has been inferred from observations that the direct effect of energetic particle precipitation (EPP) causes significant long-term mesospheric ozone variability. Satellites observe a decrease in mesospheric ozone by up to 34 % between EPP maximum and EPP minimum. Here, we analyze the climate impact of polar mesospheric and polar stratospheric ozone losses due to EPP in the coupled climate model MPI-ESM. Using radiative transfer modeling, we find that the radiative forcing of a mesospheric ozone loss during polar night is small. Hence, climate effects of a mesospheric ozone loss due to energetic particles seem unlikely. A stratospheric ozone loss due to energetic particles warms the winter polar stratosphere and subsequently weakens the polar vortex. However, those changes are small, and few statistically significant changes in surface climate are found.

Citation: Meraner, K. and Schmidt, H.: Climate Impact of Polar Mesospheric and Stratospheric Ozone Losses due to Energetic Particle Precipitation, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-507, in review, 2017.
Katharina Meraner and Hauke Schmidt
Katharina Meraner and Hauke Schmidt
Katharina Meraner and Hauke Schmidt

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Short summary
Using a coupled Earth System model and radiative transfer modelling we show that the radiative forcing of a winter polar mesospheric ozone loss due to energetic particle precipitation is negligible. A climate impact of a mesospheric ozone loss as suggested by Andersson et al. (2014, Nature Communications) seems unlikely. A winter polar stratospheric ozone loss due to energetic particle precipitation leads to a small warming of the stratosphere; however, only few statistically significant changes
Using a coupled Earth System model and radiative transfer modelling we show that the radiative...
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