Wpływ Oscylacji Północnoatlantyckiej na zmiany stabilności reżimu stanów wody jezior w Polsce
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Date
2017
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Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk
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Abstract
The paper presents results of research on the stability of water stage regime of Polish lakes in different
phases of the North Atlantic Oscillation. The stability of the regime was defined as the degree of regularity
of occurrence of a particular phase of the hydrological regime, i.e. high and low water stages. The determination
of the stability of water stage regime in lakes applied the stability coefficient. The analysis covered data
concerning mean monthly values of water stages from 1976–2010 for 34 lakes located in Polish lakelands.
According to the study, the effect of changes in the North Atlantic Oscillation on water stages in lakes is variable
in time and space. In the positive NAO phase, maximums on lakes occur earlier than on average – in winter
and spring, and in the negative phase - later. Minimums change in a lower range, particularly in the positive
NAO phase. In the negative phase, on the majority of lakes, the term of appearance of Imin was later than on
average. The term of occurrence of minimums is considerably variable, particularly in the positive phase, and
in the negative phase it is usually later, and occurs in autumn.
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Keywords
lakes, water level regime, stability coefficient, North Atlantic Oscillation
Citation
Badania Fizjograficzne, Seria A, Tom 68, 2017, s. 127-138