Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2009JD013659 |
Anthropogenic air pollution observed near dust source regions in northwestern China during springtime 2008 | |
Li, Can1; Tsay, Si-Chee6; Fu, Joshua S.4; Dickerson, Russell R.1; Ji, Qiang1; Bell, Shaun W.2; Gao, Yang4; Zhang, Wu5; Huang, Jianping5; Li, Zhanqing1,7; Chen, Hongbin3 | |
通讯作者 | Li, Can |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2010 |
卷号 | 115 |
英文摘要 | Trace gases and aerosols were measured in Zhangye (39.082 degrees N, 100.276 degrees E, 1460 m a. s. 1.), a rural site near the Gobi deserts in northwestern China during spring 2008. Primary trace gases (CO: 265 ppb; SO2: 3.4 ppb; NOy*: 4.2 ppb; hereafter results given as means of hourly data) in the area were lower than in eastern China, but still indicative of marked anthropogenic emissions. Sizable aerosol mass concentration (153 mu g/m(3)) and light scattering (159 Mm(-1) at 500 nm) were largely attributable to dust emissions, and aerosol light absorption (10.3 Mm(-1) at 500 nm) was dominated by anthropogenic pollution. Distinct diurnal variations in meteorology and pollution were induced by the local valley terrain. Strong daytime northwest valley wind cleaned out pollution and was replaced by southeast mountain wind that allowed pollutants to build up overnight. In the afternoon, aerosols had single scattering albedo (SSA, 500 nm) of 0.95 and were mainly of supermicron particles, presumably dust, while at night smaller particles and SSA of 0.89-0.91 were related to pollution. The diverse local emission sources were characterized: the CO/SO2, CO/NOy, NOy/SO2 (by moles), and BC/CO (by mass) ratios for small point sources such as factories were 24.6-54.2, 25.8-35.9, 0.79-1.31, and 4.1-6.1 x 10(-3), respectively, compared to the corresponding inventory ratios of 43.7-71.9, 23.7-25.7, 1.84-2.79, and 3.4-4.0 x 10(-3) for the industrial sector in the area. The mixing between dust and pollution can be ubiquitous in this region. During a dust storm shown as an example, pollutants were observed to mix with dust, causing discernible changes in both SSA and aerosol size distribution. Further interaction between dust and pollutants during transport may modify the properties of dust particles that are critical for their large-scale impact on radiation, clouds, and global biogeochemical cycles. |
类型 | Article |
语种 | 英语 |
国家 | USA ; Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000283084500006 |
WOS关键词 | AEROSOL OPTICAL-PROPERTIES ; ASIAN DUST ; ACE-ASIA ; NORTHERN CHINA ; MINERAL DUST ; TROPOSPHERIC CHEMISTRY ; RADIATIVE PROPERTIES ; SOIL DUST ; INTEX-B ; LIGHT-ABSORPTION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
来源机构 | 兰州大学 ; 中国科学院大气物理研究所 ; 南京信息工程大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/165226 |
作者单位 | 1.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; 2.Sci Syst & Applicat Inc, Lanham, MD 20706 USA; 3.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China; 4.Univ Tennessee, Dept Civil & Environm Engn, Knoxville, TN 37996 USA; 5.Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Peoples R China; 6.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20770 USA; 7.Nanjing Univ Informat Sci & Technol, Coll Atmospher Phys, Nanjing, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Can,Tsay, Si-Chee,Fu, Joshua S.,et al. Anthropogenic air pollution observed near dust source regions in northwestern China during springtime 2008[J]. 兰州大学, 中国科学院大气物理研究所, 南京信息工程大学,2010,115. |
APA | Li, Can.,Tsay, Si-Chee.,Fu, Joshua S..,Dickerson, Russell R..,Ji, Qiang.,...&Chen, Hongbin.(2010).Anthropogenic air pollution observed near dust source regions in northwestern China during springtime 2008.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,115. |
MLA | Li, Can,et al."Anthropogenic air pollution observed near dust source regions in northwestern China during springtime 2008".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 115(2010). |
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