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| Titel |
Investigation of surface ozone variability over the Antractic Plateau by observations at the “Concordia” WMO/GAW contributing station |
| VerfasserIn |
Paolo Cristofanelli, Roberto Udisti, Maurizio Busetto, Francescopiero Calzolari, Davide Putero, Angelo Lupi, Mauro Mazzola, Boyan Petkov, Paolo Bonasoni |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250148907
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| Publikation (Nr.) |
 EGU/EGU2017-13212.pdf |
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| Zusammenfassung |
| Tropospheric ozone (O3), is a greenhouse gas and a driver for atmosphere oxidative capacity. It has at least doubled since pre-industrial age but a comprehensive understanding of the global distribution and trends are difficult to achieve due to its reactivity. Measurements at Antarctic locations provide the opportunity to investigate O3 variability without direct anthropogenic influence providing information on its background variability.
This work will focus on the investigation of the variability of surface tropospheric O3 over the eastern Antarctic Plateau. In particular, we will analyze seven years (2006 – 2013) of continuous observations at the WMO/GAW Contributing Station Concordia (75.10ºS, 123.33ºE, 3233m a.s.l. m) with the purpose of shading light on specific atmospheric processes that need to be accurately taken into account for interpreting O3 variability: (i) in-situ NOx emissions and subsequent photochemical O3 production during summer, (ii) long-range transport of air-masses enriched in O3 by photochemical production over the surface of Antarctic Plateau, (iii) long-range transport of air-masses depleted in O3 from coastal regions or open oceans. Moreover, even if their influence is expected to be limited, the possible influence of STE will be specifically investigated.
To this aims, in-situ O3 variability will be analyzed as a function of 3D air-mass back-trajectories calculated by the HYSPLIT and FLEXTRA models. Co-variability with meteorological parameters and other atmospheric tracers (e.g. aerosol measurement as a function of key source and transport processes) will be also studied in order to provide a preliminary assessment of their impact on O3 variability. The STEFLUX (Stratosphere-to-Troposphere Exchange Flux) tool will be used to investigate the influence of stratosphere-to-troposphere transport on ozone variability over eastern Antarctic Plateau. |
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