Open AccessCirculation epochs based on the Vangengeim-Girs large scale patterns (1891–2010)
Author(s) -
Jan Degirmendžić,
Krzysztof Kożuchowski
Publication year - 2018
Publication title -
acta universitatis lodziensis. folia geographica physica
Language(s) - English
Resource type - Journals
eISSN - 2353-6063
pISSN - 1427-9711
DOI - 10.18778/1427-9711.17.01
Subject(s) - circulation (fluid dynamics) , climatology , atmospheric circulation , character (mathematics) , scale (ratio) , walker circulation , geography , geology , mathematics , physics , el niño southern oscillation , cartography , mechanics , geometry
This paper presents the results of an investigation of the variability in macro-circulation forms at the mid-tropospheric level distinguished in the Vangengeim-Girs (V-G) classification. The annual frequencies of circulation forms in the years 1891–2010 proved significant fluctuations, which provided the basis for distinguishing 7 circulation epochs. The epochs illustrate secular changes in the character of dominant forms – zonal circulation (W) prevailed at the turn of the 20th century; meridional forms E and C developed next, and zonal circulation began to dominate again after 1990.