Black carbon in PM2.5, data from two urban sites in Guadalajara, Mexico during 2008

Developmental Biology

Patricia Carbajal–Romero³  Leonel Hernandez–Mena³  Jose Luis Arriaga–Colina²  Winston Smith¹  Ricardo Cosio–Ramirez³  Alberto Lopez–Lopez³  Hugo Saldarriaga–Norena³  Maria Teresa Limon–Sanchez³ 

[1] Peace Corps Volunteer, Peace Corps Mexico. Av. Universidad 202, CP 76020. Querétaro, Qro., Mexico$$;Instituto Mexicano del Petróleo. Eje Central Lázaro Cárdenas 152. Colonia San Bartolo Atepehuacan, CP 07730. México DF. Mexico$$;Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco. Av. Normalistas 800. Colonia Colinas de la Normal, CP 44270. Guadalajara, Jalisco. Mexico$$

关键词: Black carbon aerosol;    PM2.5;    Aethalometer;    Urban atmosphere;    Guadalajara air pollution;   

DOI  :  10.5094/APR.2011.040

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

The BC and PM_2.5 concentrations in Guadalajara, Mexico were measured in 2008 using a two–wavelength Aethalometer and a Partisol sampler, respectively. The aerosols were collected within two sites of the local Network Monitoring Stations, Centro in downtown and Miravalle in the south. BC was measured from January to December and PM_2.5 from January to August. The 24–h PM_2.5 mean concentrations were 73 and 90 µg m^‐3 at Centro and Miravalle, respectively. Mexican air quality 24–h standard (65 µg m^–3) was exceeded by 79% of the PM_2.5 samples. The BC study period was divided into three seasons: two dry seasons (DS1 and DS2) and one rainy season (RS). The hourly BC median concentrations at Centro and Miravalle were 1.3–8.7 and 1.5–13.8 µg m^‐3 in DS1 while 1.4–3.3 and 1.9–6.4 µg m^–3 in RS, and 1.4–7.0 µg m^‐3 in DS2. When the 24–h mean BC concentration is compared to the mass concentration of PM_2.5, it shows that BC comprises less than 10% of the fine particles measured at the same period. Considering the meteorological parameters wind speed and wind direction, data analysis indicates that the BC concentration is mainly influenced by local sources at Centro, but by regional and/or long–range transport and local sources at Miravalle site. The strong correlation between BC and carbon monoxide concentrations confirmed that these two species at the two sites have common sources.

【 授权许可】

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