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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:
散金祈福
+5/4150
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每年这时候我都再仔细读一遍《范进中举》
+1/482
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坐标北京诚征男友
+1/116
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山东征女友，坐标济南
+1/91
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上海交通大学张航课题组招聘博士后（电化学储能）
+1/91
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Polymers 期刊特刊 组稿
+1/82
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强耀生物金秋开学季活动，2026年8月18日-10月31日，肽库筛选低至2W5
+3/70
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南方医科大学深圳医院陈烨/余涛教授课题组联合培养博士后招聘
+1/12
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2026年国自然
+1/9
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祈祷老公中国基
+1/9
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2027环境工程博士申请
+1/9
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南京大学 智能驱动与感知材料实验室 诚招申请考核博士生/科研助理/博士后
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Olink高通量蛋白组测序：PEA 技术驱动的微量样本蛋白全景解析
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基金焦虑，发个帖子，缓解一下
+2/4
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中国科学院生态环境研究中心环境工程相关方向招收保送硕士和联合培养博士和硕士研究生
+1/4
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南京医科大学-冯璋课题组-招收2027级生化与分子生物学专业博士和硕士研究生
+1/3
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北理工集成电路杰青团队 | 诚招科助理
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河海大学海洋环境污染与生态毒理学研究组招收2027级硕士生 及博士研究生
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【产品测评分享】体外转录产量不理想、dsRNA 副产物高？T7 RNA 聚合酶实测体验
+1/1
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清华大学环境课题组招聘环境工作专业客座生研究生2-3名（应用导向）
+1/1
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
