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Weather types accompanying very high pressure in Krakow in the period 1901–2000

Weather types accompanying very high pressure in Krakow in the period 1901–2000 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 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Climatology Wiley

Weather types accompanying very high pressure in Krakow in the period 1901–2000

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References (61)

Publisher
Wiley
Copyright
Copyright © 2010 Royal Meteorological Society
ISSN
0899-8418
eISSN
1097-0088
DOI
10.1002/joc.2230
Publisher site
See Article on Publisher Site

Abstract

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

Journal

International Journal of ClimatologyWiley

Published: Nov 30, 2011

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