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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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广西高校3个材料与化工专业的硕士名额，计划做光谱、光电器件和机器学习相结合的工作
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厦门华侨大学就读的泰国排名第一世界排名221位朱拉隆功大学学位正式招生了
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坐标广州，征女友
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广西师范大学化学工程与技术专业2026年硕士研究生招生开通第二次调剂，系统12:00关闭
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燕山大学亚稳材料全国重点实验室2026年博士研究生招生信息
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网爆某大型玻璃厂家
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安心播种，静待花开
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上海交通大学-电气工程学院-高温超导磁体-2026年秋季入学全日制博士生招聘
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天津理工大学功能晶体研究院（晶体材料全国重点实验室）杰青团队招收2026年博士研究生
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求助请教各位:如果您的算法被顶尖院校学术不端怎么办？
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欢迎调剂到郑州轻工业大学材料与化学工程学院
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广东省环境科学研究院招聘【新污染物】研究方向【博士】一名
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中国农业大学资源与环境学院 - 招聘杰出人才、青年研究员、优秀人才和博士后
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2026年华南师范大学光电科学与工程学院魏嵬课题组招收硕士调剂生
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河南城建学院生命科学与工程学院诚招工学专硕，接受跨专业调剂
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中科院地理所招收地理学土地资源学 客座生
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清华大学深圳 生物医药与健康工程研究院 Tsuboi课题组诚聘博士后
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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
8楼2014-01-25 10:03:42
9楼2014-01-27 00:32:40
11楼2014-01-27 16:54:36
