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首页> 外文期刊>Environmental Science & Technology >Seasonal Changes and Relations between Levels of Organochlorines in Arctic Ambient Air: First Results of an All-Year-Round Monitoring Program at Ny-Alesund, Svalbard, Norway
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Seasonal Changes and Relations between Levels of Organochlorines in Arctic Ambient Air: First Results of an All-Year-Round Monitoring Program at Ny-Alesund, Svalbard, Norway

机译：北极环境空气中有机氯水平的季节变化和关系：挪威斯瓦尔巴特群岛Ny-Alesund全年监测计划的初步结果

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摘要

The influence of seasonal changes and long-range transport on levels of selected polychlorinated compounds was studied by taking ambient air samples at Ny-Alesund (78°55′ N, 11°56′ E), Svalbard, Norway, once a week from March to October 1993 and with 48-h sampling intervals from November to December 1993. Polychlorinated pesticides such as chlordanes, hexachlorocyclohexanes (HCH), and DDT compounds as well as polychlorinated biphenyl (PCB) congeners were quantified by high-resolution gas chromatog-raphy combined with high- or low-resolution mass spectrometry. Due to levels being often in the sub-picogram per cubic meter range, a comprehensive quality control program was applied. This first continuous measurement campaign in the Norwegian Arctic showed a clear seasonal variation of trans-chlordane and cis-nonachlor. Circumpolartrajectories allowed identification of long-range transport from different source regions. The temporal concentration profiles of compounds with different industrial and agricultural sources allowed us to confirm such transport episodes and to differentiate between the influence of industrial and agricultural areas. A significant correlation was found between concentrations of some chlordane congeners, α- and γ-HCH isomers, and the most volatile PCB congeners. No seasonal change of the PCB concentrations was found, indicating that a weekly average temperature of 5-8℃ during summer is not large enough for a measurable revola-tilization of already deposited material.
机译：从3月开始每周一次在挪威斯瓦尔巴特群岛Ny-Alesund（78°55′N，11°56′E）采集环境空气样本，研究季节性变化和远距离迁移对所选多氯化合物水平的影响。到1993年10月，从1993年11月到1993年12月间隔48小时采样。采用高分辨率气相色谱-质谱联用技术对多氯杀虫剂，如氯丹，六氯环己烷（HCH）和DDT化合物以及多氯联苯（PCB）同类物进行了定量。高分辨率或低分辨率质谱分析。由于水平通常在每立方米亚皮克范围内，因此应用了全面的质量控制程序。挪威北极地区的首次连续测量活动表明，反式氯丹和顺式九氯的季节明显变化。绕极轨迹可以识别来自不同源区的远距离传输。具有不同工业和农业来源的化合物的时间浓度分布图使我们能够确定这种运输事件并区分工业和农业地区的影响。发现某些氯丹同系物，α-和γ-HCH异构体的浓度与最易挥发的PCB同系物之间存在显着相关性。没有发现PCB浓度的季节性变化，表明夏季的每周平均温度5-8℃不足以测量已沉积物质的可再利用。

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