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北京霧霾研究成果在Atmospheric Chemistry and Physics發(fā)表，誰分享下啊
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回復(fù)此樓» 搶金幣啦！回帖就可以得到:
電力全國重點實驗室雙一流A類長江學(xué)者團(tuán)隊招2026年全日制博士1名（4月3日截止）
+2/104
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化學(xué)化工學(xué)院 招收化工、化學(xué)、材料等相關(guān)方向研究生（學(xué)碩、專碩都有調(diào)劑名額）
+1/89
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重慶醫(yī)科大學(xué)神經(jīng)科學(xué)中心/病生與生理系誠邀海內(nèi)外優(yōu)秀博士加盟博士后隊伍（長期）
+1/81
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飄在美國，有點想家
+1/57
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山東師范大學(xué)有機(jī)化學(xué)專業(yè)胡忠燕老師課題組招收2026屆碩士研究生以及調(diào)劑生
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華南師范大學(xué)（211）博士招生- 電子、自動化、機(jī)械、生物學(xué)、物理相關(guān)專業(yè)
+2/38
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湘潭大學(xué)“過程強(qiáng)化與綠色化工”創(chuàng)新團(tuán)隊補(bǔ)招2026年秋入學(xué)博士生
+1/35
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中科院生態(tài)環(huán)境研究中心國重實驗室招聘客座研究生1-2名
+1/31
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上海交通大學(xué)電催化方向博后招聘-有鋰電、高分子、燃料電池背景者優(yōu)先
+1/31
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南京理工大學(xué)優(yōu)青團(tuán)隊招聘副教授、博士后、博士、碩士生（化學(xué)、催化方向）
+1/31
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招碩士調(diào)劑生
+2/26
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【武漢高校】【新能源材料與器件課題組】 招收優(yōu)秀碩士調(diào)劑生�。�！
+5/15
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新加坡國立大學(xué)藥學(xué)系化學(xué)生物學(xué)課題組招PhD
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211/雙一流石河子大學(xué)化學(xué)化工學(xué)院-電催化，單原子催化，CO2轉(zhuǎn)化
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南方科技大學(xué)基礎(chǔ)免疫與微生物學(xué)系招聘科研助理1-2名，從事微生物與免疫學(xué)方向研究
+1/5
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26年申博自薦-計算機(jī)視覺
+1/5
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招收化工與材料學(xué)科點研究生
+1/4
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求調(diào)劑｜一志愿廣東工業(yè)大學(xué)控制工程｜總分355｜本科電氣｜有項目/競賽/論文經(jīng)歷
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南林化工院招申請審核制博士
+1/2
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南方科技大學(xué)（同位素）化學(xué)及應(yīng)用方向博士后招聘（2名）
+1/1
9樓2014-01-27 00:32:40
8樓2014-01-25 10:03:42
★
小木蟲: 金幣+0.5, 給個紅包，謝謝回帖
小木蟲: 金幣+0.5, 給個紅包，謝謝回帖
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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樓2014-01-27 10:16:30
11樓2014-01-27 16:54:36
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