کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8864759 1620478 2018 35 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cloud-to-ground lightning activity in Colombia: A 14-year study using lightning location system data
ترجمه فارسی عنوان
فعالیت رعد و برق در زمین در کلمبیا: یک مطالعه 14 ساله با استفاده از داده های سیستم موقعیت یاب رعد و برق
کلمات کلیدی
رعد و برق، پارامترهای رعد و برق چگالی فلش رعد و برق به زمین، کلمبیا، سیستم موقعیت یابی رعد و برق
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
چکیده انگلیسی
This paper presents the analysis of 14 years of cloud-to-ground lightning activity observation in Colombia using lightning location systems (LLS) data. The first Colombian LLS operated from 1997 to 2001. After a few years, this system was upgraded and a new LLS has been operating since 2007. Data obtained from these two systems was analyzed in order to obtain lightning parameters used in designing lightning protection systems. The flash detection efficiency was estimated using average peak current maps and some theoretical results previously published. Lightning flash multiplicity was evaluated using a stroke grouping algorithm resulting in average values of about 1.0 and 1.6 for positive and negative flashes respectively and for both LLS. The time variation of this parameter changes slightly for the years considered in this study. The first stroke peak current for negative and positive flashes shows median values close to 29 kA and 17 kA respectively for both networks showing a great dependence on the flash detection efficiency. The average percentage of negative and positive flashes shows a 74.04% and 25.95% of occurrence respectively. The daily variation shows a peak between 23 and 02 h. The monthly variation of this parameter exhibits a bimodal behavior typical of the regions located near The Equator. The lightning flash density was obtained dividing the study area in 3 × 3 km cells and resulting in maximum average values of 25 and 35 flashes km- 2 year- 1 for each network respectively. A comparison of these results with global lightning activity hotspots was performed showing good correlation. Besides, the lightning flash density variation with altitude shows an inverse relation between these two variables.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Research - Volume 203, 1 May 2018, Pages 164-174
نویسندگان
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