Seasonal Changes and Relations between Levels of Organochlorines in Arctic Ambient Air: First Results of an All-Year-Round Monitoring Program at Ny-Ålesund, Svalbard, Norway
Seasonal Changes and Relations between Levels of Organochlorines in Arctic Ambient Air: First Results of an All-Year-Round Monitoring Program at Ny-Ålesund, Svalbard, Norway
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DOI：
10.1021/es950701
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发表时间：
1996-06
影响因子：
11.4
通讯作者：
M. Oehme;J. Haugen;M. Schlabach
中科院分区：
文献类型：
--
作者：
M. Oehme;J. Haugen;M. Schlabach
1993年3月至10月每周一次在挪威斯瓦尔巴德的Ny-Alesund（北纬78°55'，东经11° 56'）采集环境空气样本，1993年11月至12月每隔48小时采集一次样本，研究了季节变化和远距离迁移对某些多氯化合物水平的影响。多氯农药，如氯丹，六氯环己烷（HCH），滴滴涕化合物以及多氯联苯（PCB）同系物的定量高分辨率气相色谱结合高或低分辨率质谱。由于水平通常在每立方米次皮克范围内，因此应用了全面的质量控制程序。在挪威北极地区开展的首次连续测量活动表明，反式氯草胺和顺式九甲草胺存在明显的季节性变化。绕极轨道可用于识别不同来源区域的远距离迁移。具有不同的工业和农业来源的化合物的时间浓度分布，使我们能够确认这样的运输事件，并区分工业和农业地区的影响。一些六氯环己烷同系物、α-和γ-六氯环己烷异构体的浓度与最具挥发性的多氯联苯同系物的浓度之间存在着显著的相关性。没有发现多氯联苯浓度的季节性变化，这表明夏季每周平均温度为5-8 °C，不足以使已经沉积的物质发生可测量的再挥发。
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 Novemberto 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 chromatography 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 °C during summer is not large enough for a measurable revolatilization of already deposited material.