Carbon content of atmospheric aerosols in a residential area during the wood combustion season in Sweden

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• 作者：Patricia Krecl ; Johan Strö ; m ; Christer Johansson
• 关键词：Aethalometer ; Particle soot absorption photometer ; Elemental carbon ; Organic carbon ; PM₁₀
• 刊名：Atmospheric Environment
• 出版年：2007
• 期刊代码：11_13522310
• 类别：env
• 出版时间：October 2007
• 卷：41
• 期：33
• 页码：6974-6985
• 文件大小：320 K

摘要

Carbonaceous aerosol particles were observed in a residential area with wood combustion during wintertime in Northern Sweden. Filter samples were analyzed for elemental carbon (EC) and organic carbon (OC) content by using a thermo-optical transmittance method. The light-absorbing carbon (LAC) content was determined by employing a commercial Aethalometer and a custom-built particle soot absorption photometer. Filter samples were used to convert the optical signals to LAC mass concentrations. Additional total PM₁₀ mass concentrations and meteorological parameters were measured. The mean and standard deviation mass concentrations were 4.4±3.6 μg m⁻³ for OC, and 1.4±1.2 μg m⁻³ for EC. On average, EC accounted for 10.7%of the total PM₁₀ and the contribution of OC to the total PM₁₀ was 35.4%. Aethalometer and custom-built PSAP measurements were highly correlated (R²=0.92). The hourly mean value of LAC mass concentration was 1.76 μg m⁻³ (median 0.88 μg m⁻³) for the winter 2005–2006. This study shows that the custom-built PSAP is a reliable alternative for the commercial Aethalometer with the advantage of being a low-cost instrument.