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Physical background of the development of oxygen depletion in ice-covered lakes

机译：冰雪覆盖的湖泊中氧气耗竭发展的物理背景

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摘要

The effect of the heat interaction between a water column and sediments on the formation, development, and duration of existence of anaerobic zones in ice-covered lakes is estimated based on observational data from five frozen lakes located in northwestern Russia and North America. A simple one-dimensional model that describes the formation and development of the dissolved oxygen deficit in shallow ice-covered lakes is suggested. The model reproduces the main features of dissolved oxygen dynamics during the ice-covered period; that is, the vertical structure, the thickness, and the rate of increase of the anaerobic zone in bottom layers. The model was verified against observational data. The results from the verification show that the model adequately describes the dissolved oxygen dynamics in winter. The consumption rates of DO by bacterial plankton and by bottom sediments, which depend on the heat transfer through the water–sediment interface, are calculated. The results obtained allow the appearance of potentially dangerous anaerobic zones in shallow lakes and in separate lake areas, which result from thermal regime changes, to be predicted.
机译：根据俄罗斯西北部和北美的五个冰冻湖泊的观测数据，估计了冰柱湖泊中水柱与沉积物之间的热相互作用对厌氧区的形成，发展和存在时间的影响。提出了一个简单的一维模型，该模型描述了浅冰覆盖的湖泊中溶解氧缺乏的形成和发展。该模型再现了冰覆盖期溶解氧动力学的主要特征。即底层的厌氧区的垂直结构，厚度和增加速率。对照观察数据验证了该模型。验证结果表明，该模型充分描述了冬季的溶解氧动态。计算了细菌浮游生物和底部沉积物的溶解氧消耗率，这取决于通过水-沉积物界面的热传递。所获得的结果使得可以预测由于热态变化而导致的浅湖和不同湖区中潜在危险的厌氧区的出现。

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  • 来源
    《Oecologia》 |2007年第2期|331-340|共10页
  • 作者

    S. Golosov; O. A. Maher; E. Schipunova; A. Terzhevik; G. Zdorovennova; G. Kirillin;

  • 作者单位

    Institute of Limnology Russian Academy of Sciences 196105 St. Petersburg Russia;

    Department of Water Resources Engineering Institute of Technology Lund University Lund Sweden;

    Institute of Limnology Russian Academy of Sciences 196105 St. Petersburg Russia;

    Northern Water Problems Institute Russian Academy of Sciences 185030 Petrozavodsk Russia;

    Northern Water Problems Institute Russian Academy of Sciences 185030 Petrozavodsk Russia;

    Institute of Water Ecology and Inland Fishery 12561 Berlin Germany;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Water quality; Anaerobic zone; Thermal regime;

    机译：水质;厌氧区;热力状况;

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