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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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南京大学能源与资源学院景旭东院士团队博士后招聘公告（南京大学苏州校区）
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急招科研助理/博士后
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美国肯塔基大学Dr. Sheng Tong博士后招聘（空间可控的基因组编辑与肿瘤免疫治疗）
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211诚招硕士、博士、博后（长期有效）推免-保研-调剂-申博
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中国科大-合肥国家实验室冷原子量子网络团队招聘启事
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广东省智能院与澳门大学、澳门科技大学、澳理工联合培养博士招生
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招聘材料计算，分子动力学模拟相关讲师
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上海交大刘苏萌课题组招收集成电路专项硕士生（ALD前驱体方向，头部企业联培）
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钯膜纯化设备，如何匹配不同科研量级
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7楼2013-12-31 11:22:02
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
简单回复
2013-12-30 20:59
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lovefay(金币+1): 谢谢参与
ohcesc3楼
2013-12-30 21:12
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lovefay(金币+1): 谢谢参与
1
2013-12-30 22:17
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lovefay(金币+1): 谢谢参与
aiwoa5楼
2013-12-31 07:56
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lovefay(金币+1): 谢谢参与
2013-12-31 08:25
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lovefay(金币+1): 谢谢参与
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