Spatial variation in nitrogen dioxide in three European areas

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• 作者：Lewné ; Marie ; Cyrys ; Josef ; Meliefste ; Kees ; Hoek ; Gerard ; Brauer ; Michael ; Fischer ; Paul ; et. al.
• 关键词：NO₂ ; Measurement ; Spatial variation ; Palmes tube ; Comparison chemiluminescence/Palmes tube ; Traffic
• 刊名：Science of the Total Environment
• 出版年：2004
• 出版时间：October 1, 2004
• 年：2004
• 卷：332
• 期：1-3
• 页码：217-230
• 全文大小：201 K

文摘

In order to estimate the spatial variation within well-defined study areas, nitrogen dioxide was measured with diffusion samplers (Palmes tube) in 40–42 sites each in Germany (Munich), the Netherlands and Sweden (Stockholm County). Each site was measured over four 2-week periods during 1 year (spring 1999 to summer 2000). In each country, one reference site was measured during all periods and the results were used to adjust for seasonal variability, to improve the estimates of the annual average. Comparisons between the chemiluminescence method (European reference method) and Palmes tube measurement indicated a good agreement in Germany (with a ratio of 1.0 for Palmes tube/chemiluminescence) but underestimation for Palmes tube measurement in the Netherlands and Sweden (0.8 for both countries). The r² values were between 0.86 and 0.90 for all three countries.