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首页> 外文期刊>Environmental Science & Technology >Global Concentrations of Gaseous Elemental Mercury and Reactive Gaseous Mercury in the Marine Boundary Layer
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Global Concentrations of Gaseous Elemental Mercury and Reactive Gaseous Mercury in the Marine Boundary Layer

机译：海洋边界层中气态元素汞和反应性气态汞的全球浓度

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摘要

Gaseous elemental mercury (GEM) and reactive gaseous mercury (RGM) were measured during an eight month circumnavigation to obtain knowledge of their worldwide distributions in the marine boundary layer (MBL). Background GEM concentrations were found to be 1.32 ± 0.2 ng/m~3 (summer) and 2.62 ± 0.4 ng/m~3 (spring) in the northern hemisphere and 1.27 ± 0.2 ng/m~3 (spring and summer) in the southern hemisphere. Radiation and relative humidity are shown to control diurnal cycles of RGM. During the cruise the ship passed areas of clean MBL air, air influenced by biomass burning (South Atlantic) and air with high concentrations of GEM and RGM of unknown origin (Antarctic). High GEM concentrations above the Atlantic indicate that emission from the ocean can be an important GEM source. Our data combined with data from earlier cruises provides adequate information to establish a seasonal cycle for the Atlantic. Results show a cycle similar to that found at Mace Head, Ireland but with larger amplitude. We have improved the basic knowledge of mean GEM and RGM concentrations in the MBL worldwide and shown how natural sources and reemissions can affect GEM concentrations in the MBL.
机译：在八个月的航行中对气态元素汞（GEM）和反应性气态汞（RGM）进行了测量，以了解它们在海洋边界层（MBL）中的全球分布。发现背景GEM浓度在北半球为1.32±0.2 ng / m〜3（夏季）和2.62±0.4 ng / m〜3（春季），在北半球为1.27±0.2 ng / m〜3（春季和夏季）。南半球。辐射和相对湿度可控制RGM的昼夜循环。在航行期间，船舶经过了干净的MBL空气，受生物质燃烧影响的空气（南大西洋）和高浓度的GEM和来源不明的RGM的空气（南极）。大西洋上空的高GEM浓度表明，海洋排放可能是重要的GEM来源。我们的数据与早期航行的数据相结合，为建立大西洋的季节性周期提供了足够的信息。结果显示一个类似于爱尔兰梅斯海德的周期，但幅度更大。我们已经提高了全世界MBL中GEM和RGM平均浓度的基础知识，并展示了天然来源和释放物如何影响MBL中的GEM浓度。

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  • 来源
    《Environmental Science & Technology》 |2010年第19期|p.7425-7430|共6页
  • 作者

    ANNE L. SOERENSEN; HENRIK SKOV; DANIEL I. JACOB; BRITT T. SOERENSEN; MATTHEW S. JOHNSON;

  • 作者单位

    National Environmental Research Institute, Aarhus University,Frederiksborgvej 399, DK-4000 Roskilde;

    rnNational Environmental Research Institute, Aarhus University,Frederiksborgvej 399, DK-4000 Roskilde;

    rnDenmark, School of Engineering and Applied Sciences and Department of Earth and Planetary Sciences, Harvard University, Cambridge Massachusetts 02138;

    rnNational Environmental Research Institute, Aarhus University,Frederiksborgvej 399, DK-4000 Roskilde Copenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen,Universitetsparken 5, DK-2100 Copenhagen, Denmark;

    rnCopenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen,Universitetsparken 5, DK-2100 Copenhagen, Denmark;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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