Charakterystyka zlodzenia jezior Wielkopolskiego Parku Narodowego i jego otuliny
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Date
2013
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Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk
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Abstract
This study presents the characteristics of ice phenomena occurring on selected lakes in the
Wielkopolski National Park based on long-term observations of Góreckie Lake (1971–1992) and fieldwork
performed in February 2012 on six other water bodies. The investigation revealed the advancement of ice
phenomena appearance within the space of twenty years, as well as the advancement of their disappearance.
Such a situation also concerned the ice cover. In turn, the analysis of maximum ice thickness showed an incre- asing trend, while the number of days with compact ice cover decreased. No direct relationship was observed
between the rise in average annual water temperature and the delay in the appearance of ice phenomena in
a subsequent year. Variation in ice cover thickness measured on the six lakes studied in February 2012 was low
and amounted to only 5.5 cm. The thickest (35 cm) and the thinnest (29.5 cm) ice was recorded on the same
water body. Fieldwork showed that ice cover thickness was mostly determined by climatic conditions and not
influenced by the individual features of the consecutive lakes.
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Keywords
ice phenomena, lakes, Wielkopolski National Park
Citation
Badania Fizjograficzne, Seria A, Tom 64, 2013, s. 39-49
ISBN
978-83-7654-221-8