Baseline air mass selection at Cape Point, South Africa: application of 222Rn and other filter criteria to CO2

Concentrations of 222Rn (March 1999–August 2002) from a recently installed analyser at the station Cape Point (34°S, 18°E), South Africa, were analysed statistically. The combination of 222Rn with information on wind direction and carbon monoxide (CO) permitted a classification of air masses into co...

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Bibliographic Details
Published in:Atmospheric environment (1994) 2004-10, Vol.38 (33), p.5693-5702
Main Authors: Brunke, E.-G., Labuschagne, C., Parker, B., Scheel, H.E., Whittlestone, S.
Format: Article
Language:English
Subjects:
222Rn (radon)
Air mass classification
Applied sciences
Atmospheric pollution
Background concentration
CO2
Data filtering
Exact sciences and technology
Pollutants physicochemistry study: properties, effects, reactions, transport and distribution
Pollution
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Summary:Concentrations of 222Rn (March 1999–August 2002) from a recently installed analyser at the station Cape Point (34°S, 18°E), South Africa, were analysed statistically. The combination of 222Rn with information on wind direction and carbon monoxide (CO) permitted a classification of air masses into continental, marine, and mixtures of both. The ability to select trace gas data representing purely maritime conditions is shown through application to carbon dioxide (CO2) data. 222Rn levels at Cape Point ranged from near zero to above 5000mBqm−3. Monthly percentiles show practically no seasonal dependence for values up to the 25th percentile (P25), corresponding to 222Rn
ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2004.04.024