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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:
2026年人文教育与社会发展国际会议（HESD 2026）
+1/885
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求助DL 5009.1-2014
规程 第1部分：火力发电》
+1/487
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沈阳工业大学 环境电化学技术研究团队 招收硕士研究生（学硕/专硕）
+2/84
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爱丁顿实验
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高分辨质谱测试丨科研单位对外服务
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细胞检定样品，您用对了吗？
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委托检验的安全锁：质量保证协议，你签了吗？
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CAHSS（艺术、人文与社会科学国际会议）
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ICoEP（教育与心理学国际会议）
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ICoAAD（建筑、艺术与设计）
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GCHSD（全球文化遗产可持续发展大会）
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仪器验证全生命周期管理：检测数据精准与否的前提
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清华大学-区域环境安全全国重点实验室招聘地下水科学/水文地质方向助理研究员/副研究�
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ICoFEE（林业、生态与环境）
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单细胞VDJ测序：从B细胞库中精准挖掘抗体药优势克隆
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CoIMCT（信息、媒体与通信技术）Informatics, Media and Communication Technology
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ECNLPIR（自然语言处理与信息检索）
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ECSFS（能源、气候与可持续发展峰会）
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CoEES（能源与地球科学）2027 International Conference on Energy and Earth Science
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新能源并网仿真：AI实现规程问答与试验报告生成，电磁暂态图形工作站硬件配置方案
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11楼2014-01-27 16:54:36
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