Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2019.104699 |
Temporal variation and long-range transport of gaseous elemental mercury (GEM) over a coastal site of East China | |
Yi, Hui1,2,3,4; Tong, Lei1,2,4; Lin, Jia-mei1,2,3,4; Cai, Qiu-liang1,2,3,4; Wang, Ke-qiang1,2,3,4; Dai, Xiao-rong1,2,4; Li, Jian-rong1,2,4; Chen, Jin-sheng1,2,4; Xiao, Hang1,2,4 | |
2020-03-01 | |
发表期刊 | ATMOSPHERIC RESEARCH
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ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2020 |
卷号 | 233 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Continuous measurements of gaseous elemental mercury (GEM) play a key role in identifying mercury sources and its behavior in the atmosphere. In order to investigate the characteristics of GEM during the year when Minamata Convention on Mercury has entered into force in China, concentrations of GEM along with other pollutants were continuously measured at a coastal site in Ningbo, China. Hourly mean concentration of GEM at the study site ranged from 0.64 to 13.58 ng m(-3) and showed an annual mean of 2.44 +/- 0.95 ng m(-3). The atmospheric GEM showed obvious seasonal variations, with the highest seasonal average concentration in winter (2.62 +/- 1.05 ng m(-3)) and the lowest value in summer (2.26 +/- 0.78 ng m(-3)). The monthly variation of GEM/TGM ratios ranged from 72.6% to 98.0% and clear inverse trends for monthly GEM/TGM and O-3 were found during the entire period. Higher O-3 concentration promote the photochemical oxidation of GEM into divalent mercury. Additionally, a high GEM episode that lasted > 3 days was analyzed, and it showing high correlation with PM2.5 and SO2. The dilution of marine airflow and enhanced oxidation of GEM over sea are important for GEM depletion at the coastal site. Smoothed concentration weighted trajectory (CWT) analysis revealed that the GEM at the study site was mainly impacted by anthropogenic emissions from coastal provinces (Fujian, Jiangsu and Zhejiang) and inland provinces (Jiangxi, Anhui and Hubei). Coordinated inter-regional control on pollutant emissions is essential for the mercury reduction in the study area. |
英文关键词 | GEM Temporal variation K-means clustering Backward trajectory Concentration weighted trajectory (CWT) |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000513180200005 |
WOS关键词 | SPECIATED ATMOSPHERIC MERCURY ; SOURCE APPORTIONMENT ; PARTICULATE MERCURY ; EMISSION SOURCES ; POLAR PLOTS ; RURAL SITE ; URBAN ; SHANGHAI ; MARINE ; TGM |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/278803 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China; 2.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Ningbo Urban Environm Observat & Res Stn, Ningbo 315800, Peoples R China |
推荐引用方式 GB/T 7714 | Yi, Hui,Tong, Lei,Lin, Jia-mei,et al. Temporal variation and long-range transport of gaseous elemental mercury (GEM) over a coastal site of East China[J]. ATMOSPHERIC RESEARCH,2020,233. |
APA | Yi, Hui.,Tong, Lei.,Lin, Jia-mei.,Cai, Qiu-liang.,Wang, Ke-qiang.,...&Xiao, Hang.(2020).Temporal variation and long-range transport of gaseous elemental mercury (GEM) over a coastal site of East China.ATMOSPHERIC RESEARCH,233. |
MLA | Yi, Hui,et al."Temporal variation and long-range transport of gaseous elemental mercury (GEM) over a coastal site of East China".ATMOSPHERIC RESEARCH 233(2020). |
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