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[交流]
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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回復此樓» 搶金幣啦！回帖就可以得到:
福建師范大學葉應祥課題組招收2026級博士研究生
+2/132
-
求助紫外可見分光光度計
+1/99
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招收材料與化學相關專業(yè)碩士研究生
+1/80
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祈福2026國基面上項目
+5/75
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西北大學化學與材料科學學院博士招生（還有兩個名額，3月30日截至）
+1/63
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山東交通學院航空工程研究生接受調劑考生
+5/50
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招收2026年材料與化工專碩調劑，山東省屬重點大學，過國家線即可調劑，名額充足
+2/42
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天津理工大學國家杰青王鐵團隊招聘
+1/35
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【實戰(zhàn)型】【生物醫(yī)藥】2026青島大學招博士生 含少數(shù)民族骨干計劃2名！
+1/29
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【2026調劑】南方科技大學-深圳理工大學-中科院 聯(lián)培086000免疫方向(26.9入學)
+1/21
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浙江大學光電學院極端光學技術與儀器國家重點實驗室誠聘極紫外阿秒方向博士后
+1/18
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北京石油化工學院智能防腐涂層課題組招收2026級調劑研究生
+1/16
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西南某211招27屆博士
+1/10
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誠摯招生（碩士+博士）
+1/10
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新加坡國立大學藥學系化學生物學課題組招PhD
+1/5
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南京林業(yè)大學化學工程學院柏惺峰課題組招收2026年申請考核制博士2名
+1/4
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歡迎生物與醫(yī)藥、藥學、化學等相關專業(yè)的同學
+1/3
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【第三輪招生】澳科大誠招2026秋全獎博士研究生（納米醫(yī)學/生物材料，3月31號截止）
+1/3
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北京高校副校長團隊招收機械類，環(huán)境類學碩和專碩
+1/1
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機械求調劑 讀研還想學機械
+1/1
8樓2014-01-25 10:03:42
9樓2014-01-27 00:32:40
★
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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