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Uncertainties in modeling heterogeneous chemistry and Arctic ozone depletion in the winter 2009/2010 (Articolo in rivista)

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Uncertainties in modeling heterogeneous chemistry and Arctic ozone depletion in the winter 2009/2010 (Articolo in rivista) (literal)

Anno

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Alternative label

I. Wohltmann, T. Wegner, R. Müller, R. Lehmann, M. Rex, G. L. Manney, M. L. Santee, P. Bernath, O. Sumi?ska-Ebersoldt, F. Stroh, M. von Hobe, C. M. Volk, E. Hösen, F. Ravegnani, A. Ulanovsky, and V. Yushkov (2012)
Uncertainties in modeling heterogeneous chemistry and Arctic ozone depletion in the winter 2009/2010
in Atmospheric chemistry and physics discussion
(literal)

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I. Wohltmann, T. Wegner, R. Müller, R. Lehmann, M. Rex, G. L. Manney, M. L. Santee, P. Bernath, O. Sumi?ska-Ebersoldt, F. Stroh, M. von Hobe, C. M. Volk, E. Hösen, F. Ravegnani, A. Ulanovsky, and V. Yushkov (literal)

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Rivista

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Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany 2Institute of Energy and Climate Research - Stratosphere (IEK-7), Forschungszentrum Jülich, Jülich, Germany 3NorthWest Research Associates, Inc., Socorro, New Mexico, USA 4New Mexico Institute of Mining and Technology, Socorro, New Mexico, USA 5Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA 6University of York, York, UK 7Old Dominion University, Norfolk, VA, USA 8Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany 9University of Wuppertal, Department of Physics, Wuppertal, Germany 10ISAC-CNR, Bologna, Italy 11Central Aerological Observatory, Dolgoprudny, Russia (literal)

Titolo

Uncertainties in modeling heterogeneous chemistry and Arctic ozone depletion in the winter 2009/2010 (literal)

Abstract

Stratospheric chemistry and denitrification are simulated for the Arctic winter 2009/2010 with the Lagrangian Chemistry and Transport Model ATLAS. A number of sensitivity runs is used to explore the impact of uncertainties in chlorine activation and denitrification on the model results. In particular, the efficiency of chlorine activation on different types of liquid aerosol versus activation on nitric acid trihydrate clouds is examined. Additionally, the impact of changes in reaction rate coefficients, in the particle number density of polar stratospheric clouds, in supersaturation, temperature or the extent of denitrification is investigated. Results are compared to satellite measurements of MLS and ACE-FTS and to in-situ measurements onboard the Geophysica aircraft during the RECONCILE measurement campaign. It is shown that even large changes in the underlying assumptions have only a small impact on the modeled ozone loss, even though they can cause considerable differences in chemical evolution and denitrification. In addition, it is shown that chlorine activation on liquid aerosols alone is able to explain the observed magnitude and morphology of the mixing ratios of active chlorine, reservoir gases and ozone. (literal)

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