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Low and Declining Mercury in Arctic Russian Rivers

机译：俄罗斯北极河流中的汞含量低而下降

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摘要

Mercury (Hg) dynamics in the Arctic is receiving increasing attention, but further understanding is limited by a lack of studies in Russia, which encompasses the majority of the pan-Arctic watershed. This study reports Hg concentrations and trends in burbot (Lota lota) from the Lena and Mezen Rivers in the Russian Arctic, and assesses the extent to which they differ from those found in burbot in arctic rivers elsewhere. Mercury concentrations in burbot in the Lena and Mezen Rivers were found to be generally lower than in 23 other locations, most of which are in the Mackenzie River Basin (Canada). Mercury concentrations in burbot in the Lena and Mezen Rivers also were found to have been declining at an annual rate of 2.3% while they have been increasing in the Mackenzie River Basin at annual rates between 2.2 and 5.1% during roughly die same time period. These contrasting patterns in Hg in burbot across the pan-Arctic may be explained by geographic heterogeneity in controlling processes, including riverine paniculate material loads, historically changing atmospheric inputs, postdepositional processes, and climate change impacts.
机译：北极的汞（Hg）动力学受到越来越多的关注，但是由于缺乏对俄罗斯的研究（包括泛北极的大部分流域），进一步的了解受到了限制。这项研究报告了俄罗斯北极地区的莉娜河和梅曾河中的Burbot（Lota lota）中的汞浓度和趋势，并评估了它们与其他北极河流中的Burbot中汞含量的差异。人们发现，莉娜河和梅曾河的江鳕中的汞含量普遍低于其他23个地区，其中大多数位于麦肯齐河流域（加拿大）。莱纳河和梅曾河的江鳕中的汞含量也以每年2.3％的速度下降，而麦肯齐河流域的汞浓度却以大约每年2.2％至5.1％的年增长率上升。横跨整个北极的Burbot汞中这些相反的模式可以用控制过程中的地理异质性来解释，这些过程包括河流中的颗粒物负荷，历史变化的大气输入量，沉积后的过程以及气候变化的影响。

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  • 来源
    《Environmental Science & Technology》 |2014年第1期|747-752|共6页
  • 作者

    Leandro Castello; Alexander V. Zhulidov; Tatiana Yu. Gurtovaya; Richard D. Robarts; Robert M. Holmes; Daniel A. Zhulidov; Vladimir S. Lysenko; Robert G. M. Spencer;

  • 作者单位

    Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States;

    South Russian Centre for Preparation and Implementation of International Projects, Rostov-on-Don, Russia;

    South Russian Centre for Preparation and Implementation of International Projects, Rostov-on-Don, Russia;

    World Water and Climate Foundation, Saskatoon, Saskatchewan, Canada;

    Woods Hole Research Center, Falmouth, Massachusetts 02540, United States;

    South Russian Centre for Preparation and Implementation of International Projects, Rostov-on-Don, Russia;

    South Federal University, Institute of Biology, Rostov-on-Don, Russia;

    Woods Hole Research Center, Falmouth, Massachusetts 02540, United States;

  • 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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  • 正文语种 eng
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