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A catalogue and a classification of surface cyclones for the Western Mediterranean
Título : A catalogue and a classification of surface cyclones for the Western Mediterranean
Autor : Campins, Joan ORCID RESEARCHERID Genovés, AnaJansà Clar, AgustíGuijarro, José Antonio ORCID RESEARCHERID
Palabras clave : Western Mediterranean; Cyclones; Cluster Analysis; Ciclones; Análisis clúster
Fecha de publicación : 2002
Editor: Wiley
Citación : International Journal of Climatology. 2002, 20(9), p. 969–984
Versión del editor: https://doi.org/10.1002/1097-0088(200007)20:9<969::aid-joc519>3.0.co;2-4
Resumen : The Mediterranean Sea is a region that presents a high frequency of cyclones. Many of them are lee depressions and so mesoscale and weak, but others are strong and cover a wide area. In this study some characteristics of surface cyclones in theWestern Mediterranean are presented. First a database was built from hand analyses of sea level pressure from 1992 to 1995. Next a similar database was obtained from the LAM-INM objective analyses of the 1000 hPa geopotential field. Results show an important increase in the number of cyclones when a mesoscale analysis is carried out. Most of the Western Mediterranean cyclones are mesoscale and weak, and they are not uniformly distributed in space and in time. On one hand, there are some areas with a high concentration of cyclones. The location of some of them, close to the main mountain ranges, suggests their possible orographic origin. On the other, in some areas the cyclones are present during the whole year, but in other areas are seasonally distributed. Finally a study of typologies of the cyclones was conducted by using the cluster analysis technique. The classification was performed from the intensity of the cyclones and the shape of the sea level pressure around the centre. Results are similar from both databases and so the existence of seven typologies have been identified.
Patrocinador: This work has been partially supported by the CICYT CLI95-1780 grant.
URI : http://hdl.handle.net/20.500.11765/7105
Colecciones: Artículos científicos 2000-2004


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