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

Type
Label
  • Uncertainties in modelling heterogeneous chemistry and Arctic ozone depletion in the winter 2009/2010 (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.5194/acp-13-3909-2013 (literal)
Alternative label
  • Wohltmann, I (Wohltmann, I.)[ 1 ] ; Wegner, T (Wegner, T.)[ 2 ] ; Muller, R (Mueller, R.)[ 2 ] ; Lehmann, R (Lehmann, R.)[ 1 ] ; Rex, M (Rex, M.)[ 1 ] ; Manney, GL (Manney, G. L.)[ 3,4 ] ; Santee, ML (Santee, M. L.)[ 5 ] ; Bernath, P (Bernath, P.)[ 6,7 ] ; Suminska-Ebersoldt, O (Suminska-Ebersoldt, O.)[ 8 ] ; Stroh, F (Stroh, F.)[ 2 ] ; von Hobe, M (von Hobe, M.)[ 2 ] ; Volk, CM (Volk, C. M.)[ 9 ] ; Hosen, E (Hoesen, E.)[ 9 ] ; Ravegnani, F (Ravegnani, F.)[ 10 ] ; Ulanovsky, A (Ulanovsky, A.)[ 11 ] ; Yushkov, V (Yushkov, V.)[ 11 ] (2013)
    Uncertainties in modelling heterogeneous chemistry and Arctic ozone depletion in the winter 2009/2010
    in Atmospheric chemistry and physics (Online); Copernicus Gesellschaft MBH, Gottingen (Germania)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Wohltmann, I (Wohltmann, I.)[ 1 ] ; Wegner, T (Wegner, T.)[ 2 ] ; Muller, R (Mueller, R.)[ 2 ] ; Lehmann, R (Lehmann, R.)[ 1 ] ; Rex, M (Rex, M.)[ 1 ] ; Manney, GL (Manney, G. L.)[ 3,4 ] ; Santee, ML (Santee, M. L.)[ 5 ] ; Bernath, P (Bernath, P.)[ 6,7 ] ; Suminska-Ebersoldt, O (Suminska-Ebersoldt, O.)[ 8 ] ; Stroh, F (Stroh, F.)[ 2 ] ; von Hobe, M (von Hobe, M.)[ 2 ] ; Volk, CM (Volk, C. M.)[ 9 ] ; Hosen, E (Hoesen, E.)[ 9 ] ; Ravegnani, F (Ravegnani, F.)[ 10 ] ; Ulanovsky, A (Ulanovsky, A.)[ 11 ] ; Yushkov, V (Yushkov, V.)[ 11 ] (literal)
Pagina inizio
  • 3909 (literal)
Pagina fine
  • 3929 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 13 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] Alfred Wegener Inst Polar & Marine Res, Potsdam, Germany [ 2 ] Forschungszentrum Julich, Inst Energy & Climate Res Stratosphere IEK 7, D-52425 Julich, Germany [ 3 ] NW Res Associates Inc, Socorro, NM USA [ 4 ] New Mexico Inst Min & Technol, Socorro, NM 87801 USA [ 5 ] CALTECH, Jet Prop Lab, Pasadena, CA USA [ 6 ] Univ York, York YO10 5DD, N Yorkshire, England [ 7 ] Old Dominion Univ, Norfolk, VA USA [ 8 ] Karlsruhe Inst Technol, Inst Meteorol & Climate Res, D-76021 Karlsruhe, Germany [ 9 ] Univ Wuppertal, Dept Phys, Wuppertal, Germany [ 10 ] ISAC CNR, Bologna, Italy [ 11 ] Cent Aerol Observ, Dolgoprudnyi, Russia (literal)
Titolo
  • Uncertainties in modelling 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 modelled ozone loss, even though they can cause considerable differences in chemical evolution of other species and in denitrification. Differences in column ozone between the sensitivity runs stay below 10% at the end of the winter. 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. This is even true for binary aerosols (no uptake of HNO3 from the gas-phase allowed in the model). Differences in chlorine activation between sensitivity runs are within 30 %. Current estimates of nitric acid trihydrate (NAT) number density and supersaturation imply that, at least for this winter, NAT clouds play a relatively small role compared to liquid clouds in chlorine activation. The change between different reaction rate coefficients for liquid or solid clouds has only a minor impact on ozone loss and chlorine activation in our sensitivity runs. (literal)
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