| 查看: 1817 | 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:
2026年人文教育与社会发展国际会议（HESD 2026）
+1/855
-
诚征女友
+1/497
-
深圳｜91年IT研发，期待一份不必伪装的长久陪伴。
+5/395
-
深圳｜91年IT研发，期待一份不必伪装的长久陪伴
+5/380
-
中国农大 课题组招收2027年9月入学的考核制博士生
+5/130
-
[Sensors] 特刊征稿
+1/94
-
上海交通大学招聘塑料催化裂解/甲醇重整制氢等方向博士后
+1/86
-
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）
+2/76
-
中国科大-合肥国家实验室冷原子量子网络团队招聘启事
+2/70
-
[Mathematics] 特刊征稿
+1/42
-
[Complex & Intelligent Systems] 专刊征稿
+1/42
-
爱丁顿实验
+1/33
-
高分辨质谱测试丨科研单位对外服务
+1/20
-
蛋白翻译后修饰：解码细胞功能调控的分子密码
+1/4
-
生物发酵罐气体智能管控，层流质量流量控制器如何赋能？
+1/4
-
委托检验的安全锁：质量保证协议，你签了吗？
+1/3
-
ICoAAD（建筑、艺术与设计）
+1/2
-
仪器验证全生命周期管理：检测数据精准与否的前提
+1/2
-
ICoEP（教育与心理学国际会议）
+1/2
-
CAHSS（艺术、人文与社会科学国际会议）
+1/1
★
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
8楼2014-01-25 10:03:42
9楼2014-01-27 00:32:40
11楼2014-01-27 16:54:36
