Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-427-2018 |
Chemical characteristics of submicron particles at the central Tibetan Plateau: insights from aerosol mass spectrometry | |
Xu, Jianzhong1; Zhang, Qi2; Shi, Jinsen3; Ge, Xinlei4; Xie, Conghui1; Wang, Junfeng4; Kang, Shichang1; Zhang, Ruixiong5; Wang, Yuhang5 | |
2018-01-15 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:1页码:427-443 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Recent studies have revealed a significant influx of anthropogenic aerosol from South Asia to the Himalayas and Tibetan Plateau (TP) during pre-monsoon period. In order to characterize the chemical composition, sources, and transport processes of aerosol in this area, we carried out a field study during June 2015 by deploying a suite of online instruments including an Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-AMS) and a multi-angle absorption photometer (MAAP) at Nam Co station (90 degrees 57'E, 30 degrees 46'N; 4730 ma.s.l.) at the central of the TP. The measurements were made at a period when the transition from pre-monsoon to monsoon occurred. The average ambient mass concentration of submicron particulate matter (PM1) over the whole campaign was similar to 2.0 mu g m(-3), with organics accounting for 68 %, followed by sulfate (15 %), black carbon (8 %), ammonium (7 %), and nitrate (2 %). Relatively higher aerosol mass concentration episodes were observed during the pre-monsoon period, whereas persistently low aerosol concentrations were observed during the monsoon period. However, the chemical composition of aerosol during the higher aerosol concentration episodes in the pre-monsoon season was on a case-by-case basis, depending on the prevailing meteorological conditions and air mass transport routes. Most of the chemical species exhibited significant diurnal variations with higher values occurring during afternoon and lower values during early morning, whereas nitrate peaked during early morning in association with higher relative humidity and lower air temperature. Organic aerosol (OA), with an oxygen-to-carbon ratio (O/C) of 0.94, was more oxidized during the pre-monsoon period than during monsoon (average O/C ratio of 0.72), and an average O/C was 0.88 over the entire campaign period, suggesting overall highly oxygenated aerosol in the central TP. Positive matrix factorization of the high-resolution mass spectra of OA identified two oxygenated organic aerosol (OOA) factors: a less oxidized OOA (LO-OOA) and a more oxidized OOA (MO-OOA). The MO-OOA dominated during the pre-monsoon period, whereas LO-OOA dominated during monsoon. The sensitivity of air mass transport during pre-monsoon with synoptic process was also evaluated with a 3-D chemical transport model. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419987700002 |
WOS关键词 | POSITIVE MATRIX FACTORIZATION ; ATMOSPHERIC BROWN CLOUDS ; BIOMASS-BURNING SMOKE ; ORGANIC AEROSOL ; BLACK CARBON ; HIGH-RESOLUTION ; POLLUTION TRANSPORT ; M A.S.L. ; TROPOSPHERE TRANSPORT ; LOWER STRATOSPHERE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24976 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China; 2.Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA; 3.Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semi Arid Climate Change, Lanzhou 730000, Gansu, Peoples R China; 4.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China; 5.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA |
推荐引用方式 GB/T 7714 | Xu, Jianzhong,Zhang, Qi,Shi, Jinsen,et al. Chemical characteristics of submicron particles at the central Tibetan Plateau: insights from aerosol mass spectrometry[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(1):427-443. |
APA | Xu, Jianzhong.,Zhang, Qi.,Shi, Jinsen.,Ge, Xinlei.,Xie, Conghui.,...&Wang, Yuhang.(2018).Chemical characteristics of submicron particles at the central Tibetan Plateau: insights from aerosol mass spectrometry.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(1),427-443. |
MLA | Xu, Jianzhong,et al."Chemical characteristics of submicron particles at the central Tibetan Plateau: insights from aerosol mass spectrometry".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.1(2018):427-443. |
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