Analysis of near-surface ozone variations in Terra Nova Bay, Antarctica
| Autor: | Boyan Petkov, Paolo Bonasoni, Christian Lanconelli, G. Trivellone, Angelo Lupi, Paolo Cristofanelli, U. Bonafè, Vito Vitale, Francescopiero Calzolari |
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| Rok vydání: | 2008 |
| Předmět: |
Pollution
Katabatic wind Ozone media_common.quotation_subject Air pollution Geology Oceanography Atmospheric sciences medicine.disease_cause Troposphere chemistry.chemical_compound chemistry Climatology Atmospheric chemistry medicine Environmental science Tropospheric ozone Bay Ecology Evolution Behavior and Systematics media_common |
| Zdroj: | Antarctic Science. 20:415-421 |
| ISSN: | 1365-2079 0954-1020 |
| Popis: | Ozone concentration measurements were made during December from 2001–2005 to quantify the contributions of different processes to near-surface ozone concentrations (O3) in Terra Nova Bay, Antarctica. The average O3 concentration was 20.3 ppbv. On days characterized by high solar radiation fluxes (HSR), significantly higher concentrations of O3 (21.3 ppbv) were recorded compared to days with low solar radiation fluxes (LSR days, 16.8 ppbv). High O3 concentrations could be related to strong winds from SW–NW. Three-dimensional back-trajectories show that air from the interior of the continent could affect O3 at Terra Nova Bay. Moreover, during HSR days, high O3 concentrations were also recorded in connection with weak circulation, suggesting that emissions from the Italian base (located 2 km north) could also represent a significant source of O3. To clarify the role of local pollution in Terra Nova Bay, O3 values were also calculated using the photochemical steady state (PSS) approximation under clear sky and cloudy conditions. |
| Databáze: | OpenAIRE |
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