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Atmosphere 2018, 9(10), 397; https://doi.org/10.3390/atmos9100397

A Climatological Study of Western Mediterranean Medicanes in Numerical Simulations with Explicit and Parameterized Convection

1
Department of Earth and Environmental Sciences, University of Milan-Bicocca, 20126 Milan, Italy
2
Laboratoire de Physique, ENS de Lyon, Université Claude Bernard, 69364 Lyon, France
3
CIMA Foundation, 17100 Savona, Italy
4
Institute of Atmospheric Sciences and Climate, Consiglio Nazionale delle Ricerche (ISAC-CNR), 10133 Turin, Italy
*
Author to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 27 September 2018 / Accepted: 2 October 2018 / Published: 11 October 2018
(This article belongs to the Special Issue Mediterranean Tropical-Like Cyclones (Medicanes))
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Abstract

The semi-enclosed Mediterranean basin, surrounded by high mountains, is placed in a favorable location for cyclonic storms development. Most of these are extratropical cyclones of baroclinic and orographic origin, but occasionally, some low pressure systems may develop to assume features characteristic of tropical cyclones. Medicanes (MEDIterranean hurriCANES) are infrequent and small-sized tropical-like cyclones. They originate and develop over sea, and are associated with strong winds and heavy precipitations. Proper definitions and classifications for Medicanes are still partially lacking, and systematic climatic studies have appeared only in recent years. In this work, we provide climatologies of Medicanes in the Western Mediterranean basin based on multidecadal runs performed with the Weather Research and Forecasting regional model with different resolutions and setups. The detection of Medicanes is based on a cyclone tracking algorithm and on the methodology of Hart cyclone phase space diagrams. We compare the statistics of Medicanes in the historical period 1979–1998 between runs at a resolution of 11 km with different convective parameterizations and microphysics schemes and one run at a resolution of 4 km with explicitly resolved convection. We show how different convective parameterization schemes lead to different statistics of Medicanes, while the use of different microphysical schemes impacts the length of the cyclone trajectories. View Full-Text
Keywords: Medicanes; Mediterranean tropical-like cyclones; mesoscale meteorology; convection; air-sea interaction Medicanes; Mediterranean tropical-like cyclones; mesoscale meteorology; convection; air-sea interaction
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ragone, F.; Mariotti, M.; Parodi, A.; von Hardenberg, J.; Pasquero, C. A Climatological Study of Western Mediterranean Medicanes in Numerical Simulations with Explicit and Parameterized Convection. Atmosphere 2018, 9, 397.

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