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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:
坐标上海，诚征女友，非常 着急，私信必回
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散金币，求好运，祝面上顺利！
+2/96
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专业技术开发及第三方检测
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物理学 调剂
+1/85
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福建师范大学招收2026年化学、材料硕士3-4名
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西北大学化学与材料科学学院博士招生（还有两个名额，3月30日截至）
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中国药科大学211-课题组招收2026博士/硕士
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光学工程学硕调剂信息
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北京航空航天大学招生微流控与智能打印技术方向博士研究生
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招收专业代码08的学硕！
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南京理工大学2026级硕士生招生-张光普博导 &硕导
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报名通道开启啦！浙江中医药大学副校长团队招聘药学/生物信息学等方向高校教师7名(地�
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26年博士自荐
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医学327分专硕调剂
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新加坡国立大学药学系化学生物学课题组招PhD
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2026考研的同学，分数不够？想调剂上岸的同学，来看
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【第三轮招生，31号截止】澳科大诚招2026秋全奖博士研究生（纳米医学/生物材料方向）
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南方科技大学生命科学学院基础免疫与微生物学系招收博士后
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课题组招收环境及相关专业调剂硕士研究生（欢迎优秀学生加入）
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深圳大学蔡兴科课题组博士后及研究助理招聘
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8楼2014-01-25 10:03:42
9楼2014-01-27 00:32:40
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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
