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| Titel |
Lagrangian modelling of OPALE dataset. |
| VerfasserIn |
Jaime E. Gil, Jennie Thomas, Slimane Bekki, Alexandre Kukui, Gerad Ancellet, Susanne Preunkert, Michel Legrand, Markus Frey, Joel Savarino, Bruno Jourdain, Michel Kerbrat, James France, Martin King, Ralf Toumi |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250080342
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| Zusammenfassung |
| The OPALE measurement campaign aimed to characterize the atmospheric chemistry of the
East Antarctic Plateau making a range of measurements at two sites, a coastal one, Dumont
d’Urville (DDU) (From December 2010 until March 2011, 66o S, 123oE, coastal site) and on
top of the Antarctic plateau Dome CÂ (From December 2011 until January 2012 at Dome C,
75oS, 123o E, 3233 m a.s.l.).
There are relatively few observations of chemistry occurring inland and coastal sites
Antarctic sites. During the campaign air masses originating from the marine boundary layer,
the free troposphere, the Antarctic continent, and of mixed origins were observed.
We present analyses of chemical measurements (including O3, NO2, OH, RO2,
hydrocarbons) using the CiTTyCAT photochemical trajectory model. The model simulates
the chemistry of air masses over multiple (~5) days back trajectories provided by
a stochastic trajectory model (FLEXPART). In some cases, the initial chemical
conditions are taken from a chemistry-transport model (MOZART). The effect of
clouds on the photolysis rates is also accounted for using MODIS satellite data. The
model results are compared with measurements performed during both OPALE
campaign years. Differences between the reactive nitrogen and hydroxyl radical
chemistry at DDU and Dome C and the strong influence of reactive exchanges of
trace gases between the snow and the atmosphere at Dome C are highlighted. The
implications for the oxidizing capacity of the Antarctic boundary layer are also discussed. |
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