Ciklonpályák és frontok gyakoriságváltozása az elmúlt 50 évben az európai térségben = Frequency changes of cyclones and fronts in the last fifty years in the European region
Changes in large-scale circulation patterns over the North-Atlantic-European region are presented and analyzed for the 20th century. First, changes in decadal frequency of Hess-Brezowsky macrocirculation patterns (MCP) are evaluated between 1881 and 2000. Frequency of several MCP types increased or...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | Hungarian |
| Published: |
2006
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| Subjects: | |
| Online Access: | http://acta.bibl.u-szeged.hu/62384/ http://acta.bibl.u-szeged.hu/62384/1/keveine_baranyi_ilona_unnepi_kotet_087-097.pdf |
| Summary: | Changes in large-scale circulation patterns over the North-Atlantic-European region are presented and analyzed for the 20th century. First, changes in decadal frequency of Hess-Brezowsky macrocirculation patterns (MCP) are evaluated between 1881 and 2000. Frequency of several MCP types increased or decreased considerably during these 120 years, which may be explained by large scale changes in circulation characteristics, e.g. by cyclone activity changes in the different regions. Therefore, cyclone center identification and cyclone tracks and intensity analysis have been accomplished on the base of the European Centre for Medium-range Weather Forecast (ECMWF) reanalysis datasets (ERA-40) on a 2.5º horizontal resolution grid for the period between 1957 and 2002. Results suggest that both the number of midlatitude cyclones and the cyclone activity increased considerably in the North-Atlantic-European region, especially, in the northwestern part of domain. Finally, significant frontal events (e.g. frontal precipitation and temperature changes) are also analyzed, i.e., how often and how intense they occurred in the last few decades, whether or not any trend may be detected in the Carpathian Basin. |
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