| 中国北部湾地区夏季大气碳气溶胶的空间分布特征 |
| 摘要点击 4748 全文点击 2525 投稿时间：2013-02-16 修订日期：2013-05-17 |
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| 中文关键词 北部湾 PM2.5 有机碳 元素碳 来源 |
| 英文关键词 Beibu Gulf Zone PM2.5 OC EC source |
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| 中文摘要 |
| 于2009年8月在北部湾地区的南宁、钦州、防城港、北海、湛江、茂名、海口、洋浦、东方等9个城市的城区和郊区同步采集PM2.5样品,采用热光反射碳分析仪分析得到有机碳(organic carbon, OC)、元素碳(elemental carbon, EC)的质量浓度,对OC、EC浓度水平、空间分布及其可能的来源进行分析. 结果表明,观测期间北部湾9个城市PM2.5、OC和EC的浓度均值分别为(38.4±17.7)、(9.2±2.6)和(1.9±1.1) μg·m-3,总碳气溶胶(total carbonaceous aerosol, TCA)占PM2.5质量的56.8%. 北部湾地区夏季OC主要来源于生物质燃烧和二次生成的有机碳(secondary organic carbon, SOC),EC主要来源于机动车和工业排放. |
| 英文摘要 |
| Daily (24-h average) PM2.5 samples were collected simultaneously at urban and suburban sites of nine cities (Nanning, Qinzhou, Fangchenggang, Beihai, Zhanjiang, Maoming, Haikou, Yangpu and Dongfang) in Beibu Gulf Zone during August 2009. All samples were analyzed for organic and elemental carbon (OC and EC) analyses by the thermal/optical reflectance following IMPROVE protocol. Characteristics of OC and EC concentration levels, spatial distribution, and the possible sources were discussed. The average concentrations of PM2.5, OC and EC in Beibu Gulf zone were (38.4±17.7), (9.2±2.6) and (1.9±1.1) μg·m-3, respectively. The total carbonaceous aerosol (TCA) accounted for over 56.8% of PM2.5. OC mainly came from biomass burning and secondary organic carbon (SOC), while motor exhaust and industrial emissions were the primary source of EC during summer in Beibu Gulf Zone. |
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