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Diagnosis and numerical simulations of a heavy rain event in the Western Mediterranean Basin
Title: Diagnosis and numerical simulations of a heavy rain event in the Western Mediterranean Basin
Authors: Santos Muñoz, DanielAutor AEMETMartín Pérez, María LuisaLuna Rico, Yolanda ORCID RESEARCHERID SCOPUSID Autor AEMETMorata Gasca, Ana ORCID SCOPUSID Autor AEMET
Keywords: Heavy rain; Numerical simulations; Cyclonic circulation; Convective cells
Issue Date: 2006
Publisher: European Geosciences Union
Citation: Advances in Geosciences. 2006, 7, p. 105–108
Publisher version:
Abstract: The heavy rain event of November 2001 in the western Mediterranean area was synoptically characterized by the presence of a long-lived Omega blocking geopotential pattern. A set of mesoscale numerical simulations using MM5 is performed to investigate the mechanisms responsible for the convection development through several output diagnosis. A potential vorticity evolution showed how dry air masses were extruded from the stratospheric levels promoting strong cyclonic circulation at all levels. Moreover, a deep vertical column of high relative humidity over the Algerian coastline maintained the few and geographically confined convective cells responsible for the heavy precipitation. Mesoscale environment parameters indicated enhanced conditional instability through a deep troposphere layer. Also, strong vertical wind shear values, higher than 50 ms−1 over the troposphere, were derived, indicating enough strength to promote necessary conditions to organize and keep mesoscale convective structures.
Sponsorship : This work has been partially supported by the research project CGL2004-01584/CLI
ISSN: 1680-7340
Appears in Collections:Artículos científicos 2005-2009

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