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The increasing of maximum lake water temperature in lowland lakes of central Europe: case study of the Polish Lakeland

机译:中欧低地湖泊最大湖水温度的增加:波兰·莱克兰的案例研究

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The paper presents the results of time-related changes in maximum temperatures in lakes. The analysis was carried out on the basis of 9 lakes located in the northern part of Poland. The analysis was based on daily water and air temperatures in the period 1971-2015. Mann-Kendall's and Sen's tests were applied to determine the directions and rates of change of maximum air and water temperatures. The average increase of maximum water temperature in analysed lakes was found to be 0.39 °C dec-1, while the warming trend of the maximum air temperature was 0.48 °C dec~(-1). Cluster analysis (CA) was used to group lakes characterised by similar changes of maximum water temperature. The first group included five lakes in which the values of the maximum temperature trends were 0.41 °C dec~(-1). In the second cluster the average value of maximum water temperature increase was smaller than in the first cluster (0.36 °C dec~(-1)). Comparing the results of cluster analysis with morphometric data show that in the first cluster lakes are having a greater average depth, maximum depth and water transparency in comparison to the lakes of the second cluster.
机译:本文介绍了与湖泊最大温度的时间相关变化的结果。分析是在位于波兰北部的9湖的基础上进行的。分析基于1971 - 2015年期间的日常水和空气温度。应用Mann-Kendall和Sen的测试来确定最大空气和水温变化的方向和速度。分析湖泊最大水温的平均增加为0.39℃DEC-1,而最大空气温度的变暖趋势为0.48°C DEC〜(-1)。集群分析(CA)用于将湖泊的湖泊分组,其具有相似的最大水温变化。第一组包括五个湖泊,其中最大温度趋势的值为0.41°C DEC〜(-1)。在第二簇中,最大水温升高的平均值小于第一簇(0.36°C Dec〜(-1))。比较与形态学数据的聚类分析结果表明,与第二簇的湖泊相比,在第一簇湖中具有更大的平均深度,最大深度和水透明度。

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