Seasonal Mixing and Genesis of Endogenic Meromixis in Small Lakes in Southeast Norway
Seasonal Mixing and Genesis of Endogenic Meromixis in Small Lakes in Southeast Norway
复制标题
挪威东南部小湖泊的季节性混合和内源性混合混合的成因
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
D. Hongve
中科院分区：
文献类型：
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作者：
D. Hongve
挪威东南部的内陆地区包含许多内源性部分融合的湖泊。季节混合的天气学研究进行了27寡和中营养湖泊表面积0.0013 - 7.4平方公里和水色2-146哈岑单位。范围是确定导致内源性部分融合发展的形态测量，光学和化学性质的属性。发现夏季混合深度取决于湖泊面积和水色。小型湖泊（2）在春季环流期间不完全通气，在整个夏季滞流期间，其下湖温度接近最大密度温度。非实质性的秋季混合被认为是这一地区湖泊发展部分混合的主要原因。缺氧深层沃茨中的铁和锰浓度取决于沉积物中的浓度和深层沃茨中溶解无机碳的积累。沉积物中铁含量超过干重的5%，锰含量超过干重的0.5%，有利于内源性部分融合的发展。
The inland region of Southeast Norway contains many lakes with endogenic meromixis. A synoptic study of seasonal mixing was conducted in 27 oligo- and mesotrophic lakes with surface area 0.0013 – 7.4 km 2 and water colour 2-146 Hazen units. The scope was to identify properties of morphometric, optical and chemical nature that lead to development of endogenic meromixis. The summer mixing depths were found to depend on lake area and water colour. Small lakes ( 2 ) were incompletely aerated during the spring circulation and had hypolimnetic temperatures near the temperature of maximum density throughout the summer stagnation. Insubstantial autumn mixing is considered the primary reason lakes in this area develop meromixis. Iron and manganese concentrations in anoxic deep waters depend on concentrations in the sediments and on accumulation of dissolved inorganic carbon in the deep waters. Development of endogenic meromixis is favoured by iron concentration in the sediment more than 5% of dry weight and manganese more than 0.5% of dry weight.