Using si depletion in aerosol to identify the sources of crustal dust in two chinese megacities
文献类型：期刊论文
| 作者 | Zhao, Qing1; He, Kebin1; Rahn, Kenneth A.1,2; Ma, Yongliang1; Yang, Fumo3; Duan, Fengkui1 |
| 刊名 | Atmospheric environment
 |
| 出版日期 | 2010-07-01 |
| 卷号 | 44期号:21-22页码:2615-2624 |
| 关键词 | Elemental indicator Desert dust Local fugitive dust Long-range transport |
| ISSN号 | 1352-2310 |
| DOI | 10.1016/j.atmosenv.2010.04.015 |
| 通讯作者 | He, kebin(hekb@tsinghua.edu.cn) |
| 英文摘要 | Depletion of si in transported dust has been recognized for many years. it can be used to distinguish between transported and local dust in cities, although it rarely has been. here we use the variations of the si/al ratio in 15 months of continuous pm(2.5) samples at beijing (northern china) and chongqing (southwestern china) to reveal the seasonal patterns of their dust sources. for both cities, peaks of concentration for si and al in pm(2.5) corresponded with minima of si/al, and could often be linked to pulsed air flow from deserts to the northwest. with significant depletion (up to 80%) and homogeneous distribution at urban and rural sites, si/al showed a clear seasonal evolution, which decreased from spring to slimmer, increased from fall to winter, and collapsed during chinese spring festival, indicating the dominance of transported dust, local fugitive dust and firework influence, respectively. the low ratios implied that desert dust is a common source during spring at chongqing, whereas its presence during cold season at beijing was also more frequent than expected. failing to recognize the depletion of si may lead to an overestimate of desert dust by 15%-65% when using the average abundance of al in crust (6%-8%), as in previous studies. the difference in si/al ratio between local and transported dust implies that >60% of the dust at beijing came from outside the city during the springs of 2004-2006. this result can help resolve the contradictory findings on this topic that have been presented earlier. (c) 2010 elsevier ltd. all rights reserved. |
| WOS关键词 | POSITIVE MATRIX FACTORIZATION ; LONG-RANGE TRANSPORT ; SOURCE APPORTIONMENT ; MINERAL DUST ; AFRICAN DUST ; ATMOSPHERIC AEROSOLS ; POLLUTION AEROSOLS ; SOURCE PROFILES ; AIR-POLLUTION ; FUGITIVE DUST |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000279648400013 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2410004 |
| 专题 | 中国科学院大学 |
| 通讯作者 | He, Kebin |
| 作者单位 | 1.Tsinghua Univ, State Key Joint Lab Environm Simulat & Pollut Con, Dept Environm Sci & Engn, Beijing 100084, Peoples R China 2.Univ Rhode Isl, Grad Sch Oceanog, Narragansett, RI 02882 USA 3.Chinese Acad Sci, Grad Univ, Sch Earth Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Qing,He, Kebin,Rahn, Kenneth A.,et al. Using si depletion in aerosol to identify the sources of crustal dust in two chinese megacities[J]. Atmospheric environment,2010,44(21-22):2615-2624. |
| APA | Zhao, Qing,He, Kebin,Rahn, Kenneth A.,Ma, Yongliang,Yang, Fumo,&Duan, Fengkui.(2010).Using si depletion in aerosol to identify the sources of crustal dust in two chinese megacities.Atmospheric environment,44(21-22),2615-2624. |
| MLA | Zhao, Qing,et al."Using si depletion in aerosol to identify the sources of crustal dust in two chinese megacities".Atmospheric environment 44.21-22(2010):2615-2624. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。