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Original Research Papers

Five-year analysis of background carbon dioxide and ozone variations during summer seasons at the Mario Zucchelli station (Antarctica)

Authors:

P. Cristofanelli,

National Research Council, Institute of Atmospheric Sciences and Climate Bologna, IT
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F. Calzolari,

National Research Council, Institute of Atmospheric Sciences and Climate Bologna, IT
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U. Bonafé,

National Research Council, Institute of Atmospheric Sciences and Climate Bologna, IT
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C. Lanconelli,

National Research Council, Institute of Atmospheric Sciences and Climate Bologna, IT
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A. Lupi,

National Research Council, Institute of Atmospheric Sciences and Climate Bologna, IT
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M. Busetto,

National Research Council, Institute of Atmospheric Sciences and Climate Bologna, IT
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V. Vitale,

National Research Council, Institute of Atmospheric Sciences and Climate Bologna, IT
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T. Colombo,

Centro Nazionale di Climatologia e Meteorologia, Italian Air Force, IT
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P. Bonasoni

National Research Council, Institute of Atmospheric Sciences and Climate Bologna, IT
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Abstract

Thework focuses on the analysis ofCO2 andO3 surface variations observed during five summer experimental campaigns carried out at the ‘Icaro Camp’ clean air facility (74.7◦S, 164.1◦E, 41 m a.s.l.) of the ‘Mario Zucchelli’ Italian coastal research station. This experimental activity allowed the definition of summer average background O3 values that ranged from 18.3 ± 4.7 ppbv (summer 2005–2006) to 21.3 ± 4.0 ppbv (summer 2003–2004). Background CO2 concentrations showed an average growth rate of 2.10 ppmv yr-1, with the highest CO2 increase between the summer campaigns 2002–2003 and 2001–2002 (+2.85 ppmv yr-1), probably reflecting the influence of the 2002/2003 ENSO event. A comparison with other Antarctic coastal sites suggested that the summer background CO2 and O3 at MZS-IC are well representative of the average conditions of the Ross Sea coastal regions. As shown by the analysis of local wind direction and by 3-D back-trajectory calculations, the highest CO2 and O3 values were recorded in correspondence to air masses flowing from the interior of the Antarctic continent. These results suggest that air mass transport from the interior of the continent exerts an important influence on air mass composition in Antarctic coastal areas.

How to Cite: Cristofanelli, P., Calzolari, F., Bonafé, U., Lanconelli, C., Lupi, A., Busetto, M., Vitale, V., Colombo, T. and Bonasoni, P., 2011. Five-year analysis of background carbon dioxide and ozone variations during summer seasons at the Mario Zucchelli station (Antarctica). Tellus B: Chemical and Physical Meteorology, 63(5), pp.831–842. DOI: http://doi.org/10.1111/j.1600-0889.2011.00576.x
  Published on 01 Jan 2011
 Accepted on 9 Jun 2011            Submitted on 19 Nov 2010

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