4.6 Article

Changes in the Thickness of Ice Cover on Water Bodies Subject to Human Pressure (Silesian Upland, Southern Poland)

Journal

FRONTIERS IN EARTH SCIENCE
Volume 9, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/feart.2021.675216

Keywords

ice phenomena; ice cover; ice regime; ice thickness; water body; Silesian Upland

Funding

  1. University of Silesia in Katowice (Poland)-Institute of Earth Sciences [WNP/INoZ/2020_ZB25]

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The study discusses the factors influencing ice thickness variation on water bodies in the Silesian Upland. Most of the water bodies exhibit a similar ice regime, with thickness influenced by air temperature and snow layer thickness. Some water bodies show lower ice thickness due to inflow of warmer river water or discharges of warm mine water.
The paper discusses the reasons behind the variation in the thickness of ice on 39 anthropogenic water bodies located in the Silesian Upland (southern Poland). The studies were conducted over the course of three consecutive winter seasons. The measurements and observations were scheduled every 2 days during the freezing and ablation of the ice, and every 4 days when ice cover was present. Each time the thickness of the ice cover and the snow layer covering it were measured. The results show that the 35 water bodies studied are characterized by a similar-quasi-natural-ice regime, in which ice thickness variation depends mostly on the air temperature and the thickness of the snow layer covering the ice. The ice thickness on those water bodies does not significantly differ from that observed on lakes located in northern Poland, measuring on average from circa 4 to 21 cm, and with maximum thicknesses ranging from circa 14 to 40 cm, depending on the season. Four water bodies are characterized by different ice conditions; in their case the average and maximum ice thickness was significantly lower. In the Niezdara N water body this was caused by the inflow of warmer potamic water (quasi-natural regime), whereas in Pod Borem, Sosnicka, and Somerek it was caused by discharges of warm mine water (anthropogenic regime).

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