Gaseous mercury in coastal urban areas

被引：2

作者：

Soerensen, Anne L. ^{[1
]}

Skov, Henrik ^{[1
]}

Johnson, Matthew S. ^{[2
]}

Glasius, Marianne ^{[3
]}

机构：

[1] Aarhus Univ, Natl Environm Res Inst, DK-4000 Roskilde, Denmark

[2] Univ Copenhagen, Dept Chem, Copenhagen Ctr Atmospher Res, DK-2100 Copenhagen, Denmark

[3] Aarhus Univ, Dept Chem, DK-8000 Aarhus C, Denmark

来源：

ENVIRONMENTAL CHEMISTRY | 2010年 / 7卷 / 06期

关键词：

emissions; gaseous elemental mercury; GEM/CO ratios; reactive gaseous mercury; MARINE BOUNDARY-LAYER; ATMOSPHERIC MERCURY; ELEMENTAL MERCURY; HG-DEGREES; EMISSIONS; METHYLMERCURY; VARIABILITY; VALPARAISO; TRANSPORT; HEALTH;

D O I：

10.1071/EN10088

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Approximately 50% of primary atmospheric mercury emissions are anthropogenic, resulting from e. g. emission hotspots in urban areas. Emissions from urban areas close to the coast are of interest because they could increase deposition loads to nearby coastal waters as well as contribute to long range transport of mercury. We present results from measurements of gaseous elemental mercury (GEM) and reactive gaseous mercury (RGM) in 15 coastal cities and their surrounding marine boundary layer (MBL). An increase of 15-90% in GEM concentration in coastal urban areas was observed compared with the remote MBL. Strong RGM enhancements were only found in two cities. In urban areas with statistically significant GEM/CO enhancement ratios, slopes between 0.0020 and 0.0087 ng m(-3) ppb(-1) were observed, which is consistent with other observations of anthropogenic enhancement. The emission ratios were used to estimate GEM emissions from the areas. A closer examination of data from Sydney (Australia), the coast of Chile, and Valparaiso region (Chile) in the southern hemisphere, is presented.

引用

页码：537 / 547

页数：11

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