Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0086.1 |
Identifying Changes in Source Regions Impacting Speciated Atmospheric Mercury at a Rural Site in the Eastern United States | |
Cheng, Irene1; Zhang, Leiming1; Castro, Mark2; Mao, Huiting3 | |
2017-09-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA |
英文摘要 | To investigate the effectiveness of emission reductions on the concentrations of gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particulate-bound mercury (PBM) at a rural site in Maryland (MD08), long-term (2005-14) measurements of speciated atmospheric mercury were analyzed using concentration-weighted trajectory (CWT) analysis. CWT results suggested that the number of major source regions contributing to GEM, GOM, and reactive mercury (RM = GOM 1 PBM) over the eastern United States and southeastern Canada declined over time. Across much of these regions, source contributions in 2011-14 decreased by up to 20% for GEM, by greater than 60% for GOM, and by 20%-60% for PBM compared to 2006-08, largely because of the decreases in power-plant mercury emissions since 2009. Changes in the spatial distribution of the source regions were also observed over time. Increases in source contributions of GEM after 2011 over the northeastern United States and southeastern Canada were predominantly from emission increases in metal and steel production and forest fires. Source contribution increases in PBM were more widespread, which can be attributed potentially to mercury transformation processes in the air or wood combustion rather than industrial sources. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409847100012 |
WOS关键词 | TOTAL GASEOUS MERCURY ; SOURCE APPORTIONMENT ; DIURNAL-VARIATIONS ; NORTH-AMERICA ; COASTAL SITE ; EMISSIONS ; DEPOSITION ; CANADA ; KOREA ; ASIA |
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/29207 |
专题 | 地球科学 |
作者单位 | 1.Environm & Climate Change Canada, Air Qual Res Div, Sci & Technol Branch, Toronto, ON, Canada; 2.Univ Maryland, Appalachian Lab, Ctr Environm Sci, Frostburg, MD USA; 3.SUNY Coll Environm Sci & Forestry, Dept Chem, Syracuse, NY 13210 USA |
推荐引用方式 GB/T 7714 | Cheng, Irene,Zhang, Leiming,Castro, Mark,et al. Identifying Changes in Source Regions Impacting Speciated Atmospheric Mercury at a Rural Site in the Eastern United States[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(9). |
APA | Cheng, Irene,Zhang, Leiming,Castro, Mark,&Mao, Huiting.(2017).Identifying Changes in Source Regions Impacting Speciated Atmospheric Mercury at a Rural Site in the Eastern United States.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(9). |
MLA | Cheng, Irene,et al."Identifying Changes in Source Regions Impacting Speciated Atmospheric Mercury at a Rural Site in the Eastern United States".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.9(2017). |
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