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Weather types accompanying very high pressure in Krakow in the period 1901–2000
Author(s) -
BielecBakowska Zuzanna,
Piotrowicz Katarzyna
Publication year - 2010
Publication title -
international journal of climatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.58
H-Index - 166
eISSN - 1097-0088
pISSN - 0899-8418
DOI - 10.1002/joc.2230
Subject(s) - climatology , period (music) , cold weather , environmental science , high pressure , meteorology , air temperature , geography , geology , physics , engineering physics , acoustics , engineering
The paper presents a classification of weather types observed in Krakow during the 20th century on days with particularly strong highs. The classification was based on daily values of a number of weather elements recorded at Krakow's Historic Weather Station during the period 1901–2000. Days with very high pressure were defined as those with an air pressure at 12 UTC equal to or greater than the 99th percentile of all the cases analysed (≥1037.5 hPa). A slightly modified version of a classification developed by Woś (1999) was used to determine weather types on each of the days identified. Very high pressure was found to have occurred solely during the cold half of the year (October–March). It was mostly accompanied by fairly frosty (9‐‐‐) or moderately frosty (8‐‐‐) weather types; subtype: sunny or with little cloud amount and very sunny (‐02‐) and very cloudy, without sunshine or with little sunshine (‐20‐); and weather class: without fog (‐‐‐0). No significant annual or seasonal trends were found in the occurrence of days with very high pressure or in the various weather types. Copyright © 2010 Royal Meteorological Society