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http://dx.doi.org/10.5467/JKESS.2010.31.7.749

On the Relation Between Cloud-to-Ground Lightning and Rainfall During 2006 and 2007 Summer Cases  

Oh, Seok-Geun (Department of Atmospheric Science, Kongju National University)
Suh, Myoung-Seok (Department of Atmospheric Science, Kongju National University)
Lee, Yun-Jeong (Environmental Prediction Co. Ltd.)
Publication Information
Journal of the Korean earth science society / v.31, no.7, 2010 , pp. 749-761 More about this Journal
Abstract
A relationship between cloud-to-ground lightning and rainfall was investigated by using the two-years (2006-2007) summer lightning data and the automatic weather stations (AWSs) data of the Korea Meteorological Administration. The negative lightning occurred at the core of highly concentrated convection, which is often accompanied with heavy rains. Whereas most positive lightning occurred at the anvil cloud with low density and light rains. The rainfall intensity is strongest when the negative and positive lightning occurred concurrently, and one with lightning is much stronger than that without lightning. A portion of the positive lightning of the total lightning was less than 10% during summer seasons, and the lightning without rains was about 34%. The rain rate was strongly correlated with the negative flash rate, and the correlation coefficients varied between 0.87 and 0.94 according to the co-location radius (5-15 km) of AWSs. Most of the lightning occurred 10 minutes before and/or concurrently occurred with rains. A portion of the convective rainfalls of the total rainfalls was at least 20% when we define the rainfalls with lightning as convective. The convective rainfall was greater during August than in June and July. In general, the portion of convective rainfalls showed a maximum diurnal variation during late afternoon as in the rains and lightning.
Keywords
lightning; rainfall; frequency; intensity; convective rainfall;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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