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北京雾霾研究成果在Atmospheric Chemistry and Physics发表，谁分享下啊
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回复此楼» 抢金币啦！回帖就可以得到:
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16年了，来看看大家
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科瑞赛生物内皮细胞培养基试用装限时大放送，助力你的实验高效进阶！
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福建师范大学柔性电子学院招收2026年博士（储能材料与柔性电子器件）
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上海大学昝鹏教授、军事医学研究院伯晓晨研究员/倪铭副研究员 课题组招聘博士生
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中国石油大学（华东）电气工程专业博士研究生招生
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深圳大学材料学院黄妍斐教授课题组诚招2026年秋季入学博士生
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浙江师范大学国家杰青杨启华教授团队招收2026年博士研究生
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南京理工大学曾海波/李伟金 招聘博士后（电磁响应：介电调控等方向）
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澳门大学智慧城市物联网国重“结构智能感知、健康监测与无损检测”研究方向博士后招聘
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坐标济南，山东农科院招 有机合成 or 药物化学 联培硕士研究生
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2026博士招生-上海大学先进耐火材料全国重点实验室-招收冶金工程博士研究生-1-2名
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SCI，计算机相关可以写
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福建师范大学柔性电子学院招收2026年博士（储能材料与柔性电子器件）
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SCI，计算机相关可以写
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都柏林大学(UCD)机械工程博士后招聘启事
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求助寒假实习
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液晶拓扑光子学博士招生（电子科技大学）
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土木、交通工程专业博士后站有吗？（无博士毕业3年要求+可接受兼职博后）
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2026 CSC 博士研究生招生-碳硼烷金属有机框架（MOFs）
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9楼2014-01-27 00:32:40
8楼2014-01-25 10:03:42
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小木虫: 金币+0.5, 给个红包，谢谢回帖
小木虫: 金币+0.5, 给个红包，谢谢回帖
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Atmos. Chem. Phys., 13, 7053–7074, 2013 www.atmos-chem-phys.net/13/7053/2013/ Chemical characterization and source apportionment of PM2.5 in Beijing: seasonal perspective R. Zhang1,*, J. Jing1,2,*, J. Tao3,*, S.-C. Hsu4,*, G. Wang5, J. Cao5, C. S. L. Lee6, L. Zhu3, Z. Chen7, Y. Zhao7, and Z. Shen8 Abstract. In this study, 121 daily PM2.5 (aerosol particle with aerodynamic diameter less than 2.5 μm) samples were collected from an urban site in Beijing in four months between April 2009 and January 2010 representing the four seasons. The samples were determined for various compositions, including elements, ions, and organic/elemental carbon. Various approaches, such as chemical mass balance, positive matrix factorization (PMF), trajectory clustering, and potential source contribution function (PSCF), were employed for characterizing aerosol speciation, identifying likely sources, and apportioning contributions from each likely source. Our results have shown distinctive seasonality for various aerosol speciations associated with PM2.5 in Beijing. Soil dust waxes in the spring and wanes in the summer. Regarding the secondary aerosol components, inorganic and organic species may behave in different manners. The former preferentially forms in the hot and humid summer via photochemical reactions, although their precursor gases, such as SO2 and NOx, are emitted much more in winter. The latter seems to favorably form in the cold and dry winter. Synoptic meteorological and climate conditions can overwhelm the emission pattern in the formation of secondary aerosols. The PMF model identified six main sources: soil dust, coal combustion, biomass burning, traffic and waste incineration emission, industrial pollution, and secondary inorganic aerosol. Each of these sources has an annual mean contribution of 16, 14, 13, 3, 28, and 26 %, respectively, to PM2.5. However, the relative contributions of these identified sources significantly vary with changing seasons. The results of trajectory clustering and the PSCF method demonstrated that regional sources could be crucial contributors to PM pollution in Beijing. In conclusion, we have unraveled some complex aspects of the pollution sources and formation processes of PM2.5 in Beijing. To our knowledge, this is the first systematic study that comprehensively explores the chemical characterizations and source apportionments of PM2.5 aerosol speciation in Beijing by applying multiple approaches based on a completely seasonal perspective。 |
10楼2014-01-27 10:16:30
11楼2014-01-27 16:54:36