| 查看: 1777 | 回复: 10 | ||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||
[交流]
北京雾霾研究成果在Atmospheric Chemistry and Physics发表，谁分享下啊
|
||
回复此楼» 抢金币啦！回帖就可以得到:
散金祈福
+5/1150
-
每年这时候我都再仔细读一遍《范进中举》
+1/476
-
南方医科大学|生物材料与医学工程团队诚聘科研助理
+2/270
-
散金求好运
+1/192
-
那年春暖花开，今朝如梦初醒 —— 北漂十五载，相亲十年，归乡孑然一身
+1/97
-
Polymers 期刊特刊 组稿
+1/76
-
瑞典-博后-固态电池-粘结剂-锂离子电池方向
+1/37
-
瑞典-博后-固态电池-粘结剂-锂离子电池方向
+1/37
-
瑞典-博后-固态电池-粘结剂-锂离子电池方向
+1/28
-
***大叔找对象（沪深等地）
+1/23
-
流放岭南浮肿了求救
+1/21
-
上海交通大学化学化工学院倪伟焱课题组招收2027年申请考核制博士生（电催化+高分子）
+1/12
-
祈祷老公中国基
+1/7
-
中科院大连化学物理研究所 招聘 催化剂研发方向 科研助理 2名
+1/5
-
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
+1/4
-
找女友
+1/2
-
新审查指南施行半年，AI方向的专利申请是不是更看"技术味"了？
+1/2
-
出全新蔡司 Plan?APOCHROMAT 20×/0.8 平场复消色差物镜
+1/2
-
【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
-
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
11楼2014-01-27 16:54:36
8楼2014-01-25 10:03:42
9楼2014-01-27 00:32:40
★
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
|
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
