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A 3-year study of cloud-to-ground lightning flash characteristics of Mesoscale convective systems over the Western Mediterranean Sea

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García Herrera, Ricardo and Barriopedro Cepero, David and Correoso, Juan Francisco and Hernández Martín, Emiliano and Paredes, Daniel (2006) A 3-year study of cloud-to-ground lightning flash characteristics of Mesoscale convective systems over the Western Mediterranean Sea. Atmospheric research, 79 (2). pp. 89-107. ISSN 0169-8095

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Official URL: http://dx.doi.org/10.1016/j.atmosres.2005.05.002


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Abstract

In this paper cloud-to-ground (CG) lightning flashes of 33 Mesoscale Convective Systems (MCSs) over the Western Mediterranean area are analyzed. Mean values of 22% for the positive CG ratio, 1.1 (2.4) for positive (negative) CG multiplicity, 17 kA (22.6 kA) of peak current for the positive (negative) CG flashes and a mean flash rate of around 13 min(-1) are obtained. The percentage of positive CGs and the multiplicity of negative CG are higher, while the mean peak currents are lower than in previous studies on MCSs. A more detailed case analysis reveals that there are great differences among the CG characteristics of MCSs. The life cycle of CG lightning associated with MCSs is also analyzed. The growing stages of MCSs are characterised by high CG lightning activity. The positive CG flash rate generally reaches a maximum before the negative CG flash rate does. In both cases the peak is recorded before or when MCSs show the largest area. Maximum flash rate and densities coincide with the area where the MCS shows the minimum cloud-top temperatures and therefore shows highest vertical development.


Item Type:Article
Additional Information:

© 2005 Elsevier B.V. The authors wish to thank the INM for providing the CG lightning data used in the development of the paper. Our thanks also to the two anonymous referees of this paper for their interesting suggestions and comments.

Uncontrolled Keywords:Eastern Spain, Life-Cycle, Temperatures, Mascotte, Area
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
Sciences > Physics > Atmospheric physics
ID Code:24764
Deposited On:20 Mar 2014 09:57
Last Modified:10 Dec 2018 15:05

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