Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model
ATLAS is a global Chemical Transport Model (CTM) with stratospheric chemistry and Lagrangian transport and mixing. ATLAS features a stratospheric chemistry module including 170 reactions, 46 species, a detailed treatment of heterogeneous chemistry and Lagrangian denitrification. Uncertainties in the...
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ftawi:oai:epic.awi.de:30464 2023-05-15T14:26:56+02:00 Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model Wohltmann, Ingo Rex, Markus Lehmann, Ralph 2012-08 https://epic.awi.de/id/eprint/30464/ https://hdl.handle.net/10013/epic.39948 unknown Wohltmann, I. orcid:0000-0003-4606-6788 , Rex, M. orcid:0000-0001-7847-8221 and Lehmann, R. (2012) Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model , Quadrennial Ozone Symposium 2012, Toronto, 27 August 2012 - 31 August 2012 . hdl:10013/epic.39948 EPIC3Quadrennial Ozone Symposium 2012, Toronto, 2012-08-27-2012-08-31 Conference notRev 2012 ftawi 2021-12-24T15:37:44Z ATLAS is a global Chemical Transport Model (CTM) with stratospheric chemistry and Lagrangian transport and mixing. ATLAS features a stratospheric chemistry module including 170 reactions, 46 species, a detailed treatment of heterogeneous chemistry and Lagrangian denitrification. Uncertainties in theory and observations of polar ozone depletion and limitations in the implementation of Chemistry and Transport Models (CTMs) are an issue that is often neglected. Here, stratospheric chemistry and denitrification are simulated for the Arctic winter 2009/2010. Several sensitivity runs are used to explore the impact of uncertainties in chlorine activation and denitrification on the model results. In particular, the efficiency of chlorine activation on 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 or the extent of denitrification are investigated. Results are compared to satellite measurements of MLS and ACE-FTS and to in-situ measurements onboard the Geophysica airplane during the RECONCILE measurement campaign. It is shown that even large changes in the underlying assumptions have only a relatively small impact on the modeled ozone loss, even though they can cause considerable differences in chemical evolution and denitrification. Additionally, we show first results from the winter 2010/2011, an exceptionally cold winter, which showed unprecendented ozone loss for the Arctic. Conference Object Arctic Arctic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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description |
ATLAS is a global Chemical Transport Model (CTM) with stratospheric chemistry and Lagrangian transport and mixing. ATLAS features a stratospheric chemistry module including 170 reactions, 46 species, a detailed treatment of heterogeneous chemistry and Lagrangian denitrification. Uncertainties in theory and observations of polar ozone depletion and limitations in the implementation of Chemistry and Transport Models (CTMs) are an issue that is often neglected. Here, stratospheric chemistry and denitrification are simulated for the Arctic winter 2009/2010. Several sensitivity runs are used to explore the impact of uncertainties in chlorine activation and denitrification on the model results. In particular, the efficiency of chlorine activation on 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 or the extent of denitrification are investigated. Results are compared to satellite measurements of MLS and ACE-FTS and to in-situ measurements onboard the Geophysica airplane during the RECONCILE measurement campaign. It is shown that even large changes in the underlying assumptions have only a relatively small impact on the modeled ozone loss, even though they can cause considerable differences in chemical evolution and denitrification. Additionally, we show first results from the winter 2010/2011, an exceptionally cold winter, which showed unprecendented ozone loss for the Arctic. |
format |
Conference Object |
author |
Wohltmann, Ingo Rex, Markus Lehmann, Ralph |
spellingShingle |
Wohltmann, Ingo Rex, Markus Lehmann, Ralph Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model |
author_facet |
Wohltmann, Ingo Rex, Markus Lehmann, Ralph |
author_sort |
Wohltmann, Ingo |
title |
Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model |
title_short |
Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model |
title_full |
Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model |
title_fullStr |
Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model |
title_full_unstemmed |
Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model |
title_sort |
modeling arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the atlas model |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/30464/ https://hdl.handle.net/10013/epic.39948 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_source |
EPIC3Quadrennial Ozone Symposium 2012, Toronto, 2012-08-27-2012-08-31 |
op_relation |
Wohltmann, I. orcid:0000-0003-4606-6788 , Rex, M. orcid:0000-0001-7847-8221 and Lehmann, R. (2012) Modeling Arctic ozone depletion and uncertainties in heterogeneous chemistry in the winters 2009/2010 and 2010/2011 with the ATLAS model , Quadrennial Ozone Symposium 2012, Toronto, 27 August 2012 - 31 August 2012 . hdl:10013/epic.39948 |
_version_ |
1766300435086311424 |