Détail de la notice
Titre du Document
A climatology of mesoscale convective systems over Europe using satellite infrared imagery. II: Characteristics of European mesoscale convective systems
Auteur(s)
MOREL C. ; SENESI S.
Résumé
An automated method for mesoscale convective system (MCS) identification and tracking (described in part I) is applied in order to derive a sound European MCS database using Meteosat infrared channel (IR10.8) images centred over Europe, the western Mediterranean and north Africa. The database covers five warm seasons, from April to September, for the years 1993 to 1997 and includes more than 6000 MCSs reaching at least an area of 10 000 km2. First results of the derived climatology of European MCSs are presented. They mainly address the MCS geographical location, general MCS characteristics (maximum extent, eccentricity, duration) and the diurnal cycle of the MCS. MCSs are shown to be mainly continental, but some MCS triggering is observed during the second half of August and September over the western Mediterranean Sea. Furthermore, MCS triggering is strongly correlated with orography and local maxima of MCS triggering are observed near all mountain ranges. Regions near the Alps which favour MCS triggering are described in detail. The monthly distributions of occurrence of warm-season European MCSs are also presented. Distributions of maximum extent, eccentricity, direction of propagation, life duration and triggering and dissipation times are also derived. On average, a theoretical 'typical European MCS' moves to the east-north-east, triggers near 3 p.m. Local Solar Time (LST), lasts around 5.5 hours and dissipates near 9 p.m. LST. It typically has an eccentricity at
Editeur
Wiley
Identifiant
ISSN : 0035-9009 CODEN : QJRMAM
Source
Quarterly Journal of the Royal Meteorological Society A. 2002, vol. 128, B, pp. 1973-1995 [bibl. : 28 ref.]
Langue
Anglais
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