Cyrkulacyjne warunki występowania ekstremalnych opadów atmosferycznych na Spitsbergenie
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Date
2014
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Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk
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Abstract
Circulation conditions of extreme precipitation at Spitsbergen were analyzed in this study at the
basis of daily data from 1981–2010 from the Svalbard Lufthavn station. The mean annual precipitation in
Svalbard Lufthavn amounts to 189.1 mm. The most of extreme daily precipitation cases appear in autumn and
winter. It is related to high frequency of deep polar cyclones in the cold part of the year, which bring snow and
rain to the Svalbard Archipelago. The highest daily precipitation at Spitsbergen is observed during cyclonal
circulation from south-western or western direction. In summer and autumn abundant precipitation is caused
by local cyclones appearing right over or northwest to the island. In winter and spring the pressure pattern
typical for the days with abundant precipitation characterizes with a thorough of low pressure spreading from
the Icelandic Low through the Fram Strait to the Arctic. These circulation patterns are usually accompanied
with higher-than-normal pressure over Scandinavia and northern Europe and high pressure gradients over the
North Atlantic.
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Keywords
Spitsbergen, precipitation extremes, atmospheric circulation
Citation
Badania Fizjograficzne, Seria A, Tom 65, 2014, s. 39-53
ISBN
978-83-7654-317-8