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首页> 外文期刊>Environmental Science & Technology: ES&T >Modeling the Effect of Snow and Ice on the Global Environmental Fate and Long-Range Transport Potential of Semivolatile Organic Compounds
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Modeling the Effect of Snow and Ice on the Global Environmental Fate and Long-Range Transport Potential of Semivolatile Organic Compounds

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摘要

Snow and ice have been implemented in a global multimedia box model to investigate the influence of these media on the environmental fate and long-range transport(LRT)of semivolatile organic compounds(SOCs).Investigated compounds include HCB,PCB28,PCB180,PBDE47,PBDE209,alpha-HCH,and dacthal.In low latitudes,snow acts as a transfer medium taking up chemicals from air and releasing them to water or soil during snowmelt.In high latitudes,snow and ice shield water,soil,and vegetation from chemical deposition.In the model version including snow and ice(scenario 2),the mass of chemicals in soil in high latitudes is between 27(HCB)and 97(alpha-HCH)of the mass calculated with the model version without snow and ice(scenario 1).Amounts in Arctic seawater in scenario 2 are 8(alpha-HCH)to 21(dacthal)of the amounts obtained in scenario 1.For all investigated chemicals except alpha-HCH,presence of snow and ice in the model increases the concentration in air by a factor of2(HCB)to10(PBDE209).Because of reduced netdeposition to snow-covered surfaces in high latitudes,LRT to the Arctic is reduced for most chemicals whereas transport to the south is more pronounced than in scenario 1("southward shift").The presence of snow and ice thus considerably changes the environmental fate of SOCs.

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  • 来源
    《Environmental Science & Technology: ES&T》 |2007年第17期|6192-6198|共7页
  • 作者

    JUDITH STOCKER; MARTIN SCHERINGER; FABIO WEGMANN;

  • 作者单位

    Safety and Environmental Technology Group,Institute for Chemical and Bioengineering,Swiss Federal Institute of Technology,ETH Zurich,HClG127,CH-8093,Zurich,Switzerland;

  • 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);
  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类 环境化学;
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