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Artículo

Laboratory measurements of charge separation in low liquid water content conditions and low impact velocity

Avila, Eldo EdgardoIcon ; Lighezzolo, Rafael AndresIcon ; Castellano, Nesvit EditIcon ; Pereyra, Rodolfo GuillermoIcon ; Burgesser, Rodrigo ExequielIcon
Fecha de publicación: 06/2013
Editorial: American Geophysical Union
Revista: Journal of Geophysical Research
ISSN: 0148-0227
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Oceanografía, Hidrología, Recursos Hídricos

Resumen

A laboratory investigation of the electric charge separated in collisions between vapor-grown ice crystals and a target growing by riming is presented in this work, with the goal of studying the performance of the noninductive mechanism under microphysical conditions similar to some of those which occur in the stratiform regions of the mesoscale convective systems. A series of experiments were conducted by using a target of 2 mm in diameter, for ambient temperatures between −7°C and −13°C, effective liquid water content between 0.05 and 0.5 g m−3, and air speeds between 1 and 3 m s−1. Charge diagrams of the sign of the electric charge transfer on the rimer as a function of the ambient temperature and the effective liquid water content for each velocity are presented. The results show that the riming target charges positive for temperatures above −10°C. For temperatures below −10°C, the charging is positive for high liquid water content and negative for low liquid water content. The magnitude of the charge transfer per collision under the studied conditions ranges from 0.01 to 0.2 fC. The implications of these results to the electrification processes are discussed.
Palabras clave: Lightning , Cloud Electrification , Graupel , Ice Crystals
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/26996
DOI: http://dx.doi.org/10.1002/jgrd.50555
URL: http://onlinelibrary.wiley.com/doi/10.1002/jgrd.50555/abstract
Colecciones
Articulos(IFEG)
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Citación
Avila, Eldo Edgardo; Lighezzolo, Rafael Andres; Castellano, Nesvit Edit; Pereyra, Rodolfo Guillermo; Burgesser, Rodrigo Exequiel; Laboratory measurements of charge separation in low liquid water content conditions and low impact velocity; American Geophysical Union; Journal of Geophysical Research; 118; 12; 6-2013; 6680-6687
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