Spatial variability, mixing states and composition of various haze particles in atmosphere during winter and summertime in northwest China
文献类型：期刊论文
| 作者 | Dong, Zhiwen1,2; Qin, Dahe1; Li, Kaiming3; Kang, Shichang1; Wei, Ting1; Lu, Junfeng2,4 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2019-03-01 |
| 卷号 | 246页码:79-88 |
| ISSN号 | 0269-7491 |
| 关键词 | Atmospheric haze aerosol TEM-EDX Individual particle mixing states Urban sites in northwest China Remote background sites |
| DOI | 10.1016/j.envpol.2018.11.101 |
| 通讯作者 | Dong, Zhiwen(dongzhiwen@lzb.ac.cn) |
| 英文摘要 | Pollutants, which are usually transported from urban cities to remote glacier basins, and aerosol impurities affect the earth's temperature and climate by altering the radiative properties of the atmosphere. This work focused on the physicochemical properties of atmospheric pollutants across the urban and remote background sites in northwest China. Information on individual particles was obtained using transmission electron microscopy (TEM) and energy dispersive X-ray spectrometry (EDX). Particle size and age-dependent mixing structures of individual particles in clean and polluted air were investigated. Aerosols were classified into eight components: mineral dust, black carbon (soot)/fly ash, sulfates, nitrates, NaCI salt, ammonium, organic matter, and metals. Marked spatial and seasonal changes in individual particle components were observed in the study area. Aerosol particles were generally found to be in the mixing state. For example, salt-coated particles in summer accounted for 31.2-44.8% of the total particles in urban sites and 37.5-74.5% of the total particles in background sites, while in winter, almost all urban sites comprised >50%, which implies a significant effect on the radiative forcing in the study area. We found that in PM2.5 section, the internally mixed black carbon/organic matter particles clearly increased with diameter. Moreover, urban cities were characterized by atmospheric particles sourced from anthropogenic activities, whereas background locations exhibited much lower aerosol concentrations and increased particle density, originating from natural crustal sources (e.g., mineral dust and NaCI salt), which, together with air mass trajectory analysis, indicates a potential spatial transport process and routes of atmospheric transport from urban cities to background locations. Thus, this work is of importance in evaluating atmospheric conditions in northwest China and northeast Tibetan Plateau regions, to discover the transport processes and facilitate improvements in climatic patterns concerning atmospheric impurities. (C) 2018 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | TIBETAN PLATEAU ; BLACK CARBON ; CHEMICAL-COMPOSITION ; MINERAL DUST ; GLACIERS ; INSIGHTS ; SOOT |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000458222100010 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558180 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Dong, Zhiwen |
| 作者单位 | 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryosphere Sci, Lanzhou 730000, Gansu, Peoples R China 2.Univ Cologne, Inst Geophys & Meteorol, D-50923 Cologne, Germany 3.Lanzhou City Univ, Sch Geog & Environm Engn, Lanzhou 730000, Gansu, Peoples R China 4.Chinese Acad Sci, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Zhiwen,Qin, Dahe,Li, Kaiming,et al. Spatial variability, mixing states and composition of various haze particles in atmosphere during winter and summertime in northwest China[J]. ENVIRONMENTAL POLLUTION,2019,246:79-88. |
| APA | Dong, Zhiwen,Qin, Dahe,Li, Kaiming,Kang, Shichang,Wei, Ting,&Lu, Junfeng.(2019).Spatial variability, mixing states and composition of various haze particles in atmosphere during winter and summertime in northwest China.ENVIRONMENTAL POLLUTION,246,79-88. |
| MLA | Dong, Zhiwen,et al."Spatial variability, mixing states and composition of various haze particles in atmosphere during winter and summertime in northwest China".ENVIRONMENTAL POLLUTION 246(2019):79-88. |
入库方式： iSwitch采集
来源：寒区旱区环境与工程研究所
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。