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RESEARCH PAPER
Atmospheric drought in the Polish Tatras and their foreland in the years 1951-2017
 
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Politechnika Krakowska Wydział Inżynierii Środowiska i Energetyki ul. Warszawska 24, 31-155 Kraków
CORRESPONDING AUTHOR
Marta Cebulska   

Politechnika Krakowska Wydział Inżynierii Środowiska i Energetyki ul. Warszawska 24, 31-155 Kraków
Submission date: 2021-03-18
Final revision date: 2021-04-28
Acceptance date: 2021-05-13
Publication date: 2021-07-25
 
Acta Sci. Pol. Formatio Circumiectus 2021;20(1):55–67
 
HIGHLIGHTS
  • 1.W przebiegu najniższych miesięcznych sum opadów nie dostrzeżono trendu istotnego statystycznie na poziomie istotności 0.05
  • 2.W latach 1951-2017 w polskich Tatrach wystąpiły miesiące z opadem poniżej 10% wartości średniej opadów z wielu lat
  • 3. Największa częstość okresów suchych przypadła na czerwiec i styczeń – prawie 17%
  • 4.W przypadku miesięcy z niedoborem opadów, dominowały typy cyrkulacji – Ea, SEa, Sa oraz Ka
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ABSTRACT
Aim of the study:
The aim of this study is to assess the variability of the lowest monthly totals of precipitation and to assess the impact of atmospheric circulation and average air temperature on the occurrence of months with a deficit of precipitation.

Material and methods:
Material: The monthly totals of atmospheric precipitation for the years 1951-2017 from 19 meteorological stations located in the Polish Tatra Mountains and in their foreland. The study also took into account the monthly average air temperatures for which it was possible to collect data from the entire study period. To this end, the calendar of atmospheric circulation types for southern Poland, which was developed by Niedźwiedź [1981; 2018]. Methods: Standardized Precipitation Index (SPI), the Mann-Kendall test

Results and conclusions:
No statistically significant trend at a significance level of 0.05 was noted in the course of the lowest monthly precipitation totals at any of the meteorological stations. In the 67-year period, all the measuring stations saw a total of 499 (3.3%) dry months with varying drought severity. The largest number of extremely dry months occurred in August and April, respectively. In the case of months when the lowest totals of precipitation occurred in the same month at all or almost all of the meteorological stations, three types of anticyclonic circulation dominated, i.e. eastern, south-eastern, southern, and in the anticyclonic wedge. Dry periods of varying drought severity (SPI≤-1) may occur throughout the year, regardless of air temperature.

ISSN:1644-0765