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标题：Circulation types classification for hourly precipitation events in Lublin (East Poland)
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作者：Krzysztof Bartoszek ; Dominika Skiba
期刊名称：Open Geosciences
电子版ISSN：2391-5447
出版年度：2016
卷号：8
期号：1
页码：214-230
DOI：10.1515/geo-2016-0019
语种：English
出版社：Walter de Gruyter GmbH & Co. KG
摘要：Abstract The paper presents an objective classification of circulation types for East-Central Europe with application to hourly precipitation events in Lublin (East Poland) from May to September. The development of the classification utilized sub-daily sea-level pressure values (at the main standard synoptic hours, i.e. 00, 06, 12 and 18 UTC). Sea-level pressure values and physical quantities (resultant flow direction and total shear vorticity) defined 27 circulation types: a) eight each of the directional cyclonic, transitional, and anticyclonic circulation types, and b) one each of the non-directional cyclonic, anticyclonic, and undefined types. In the years 1961-2010, the highest mean precipitation amount in the study area was recorded for cyclonic non-directional type C, followed by cyclonic types with air flow from the western and northern sectors. Type C was also distinguished by the highest number of precipitation events with high intensity irrespective of their duration, i.e. short-term, medium-term, and long-term precipitation events. Moreover, in the class of cyclonic types, precipitation events were considerably longer than in anticyclonic and transitional types. On the other hand, for anticyclonic types, precipitation with high intensity was recorded much more rarely, particularly in the case of advection from the southern sector.
关键词：Keywordscirculation typesatmospheric circulationhourly precipitationprecipitation intensityEast-Central Europe