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A Cloud-to-Ground Lightning Climatology for Romania

A Cloud-to-Ground Lightning Climatology for Romania The first study of the characteristics of cloud-to-ground (CG) lightning in Romania, based on the data recorded by the Romanian National Lightning Detection Network (RNLDN), is presented. The data, more than 1.75 million CG flashes, covers the entirety of Romania and were recorded between January 2003 and December 2005 and January and December 2007. The spatial analyses (total and positive flash density, the percentage of positive flashes, and negative and positive peak currents) were done with a resolution of 20 km. The average spatial distribution shows a maximum (3.06 flashes km −2 yr −1 ) over the south slopes of the central meridional Carpathians possibly associated with the Romanian Plain convergence zone. The mean monthly variation shows maximum CG lightning between May and September (98%) and minimum values in December and January. High values (>0.028 km −2 yr −1 ) for positive CG lightning density are observed in southwestern and central Romania. The monthly distribution of positive flashes shows a main maximum in May (25%) and a secondary maximum in August (23%), suggesting that positive flashes tend to occur earlier in the year than total flashes. The mean annual percentage of positive flashes has lower values at 1.3% in the central parts of the country. The percentage of positive CG flashes changes over the year from 1% in June to 19% in January. The monthly variation of the median first-strike peak currents has a maximum in winter and reaches a minimum in July, for both negative and positive currents. The mean diurnal cycle for total CG lightning flashes peaks between 1230 and 1430 UTC (2.2%) and shows a minimum between 0600 and 0800 UTC (0.3%). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Monthly Weather Review American Meteorological Society

A Cloud-to-Ground Lightning Climatology for Romania

Antonescu, Bogdan; Burcea, Sorin
Monthly Weather Review , Volume 138 (2) – Feb 20, 2009
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Publisher
American Meteorological Society
Copyright
Copyright © 2009 American Meteorological Society
ISSN
1520-0493
DOI
10.1175/2009MWR2975.1
Publisher site
See Article on Publisher Site

Abstract

The first study of the characteristics of cloud-to-ground (CG) lightning in Romania, based on the data recorded by the Romanian National Lightning Detection Network (RNLDN), is presented. The data, more than 1.75 million CG flashes, covers the entirety of Romania and were recorded between January 2003 and December 2005 and January and December 2007. The spatial analyses (total and positive flash density, the percentage of positive flashes, and negative and positive peak currents) were done with a resolution of 20 km. The average spatial distribution shows a maximum (3.06 flashes km −2 yr −1 ) over the south slopes of the central meridional Carpathians possibly associated with the Romanian Plain convergence zone. The mean monthly variation shows maximum CG lightning between May and September (98%) and minimum values in December and January. High values (>0.028 km −2 yr −1 ) for positive CG lightning density are observed in southwestern and central Romania. The monthly distribution of positive flashes shows a main maximum in May (25%) and a secondary maximum in August (23%), suggesting that positive flashes tend to occur earlier in the year than total flashes. The mean annual percentage of positive flashes has lower values at 1.3% in the central parts of the country. The percentage of positive CG flashes changes over the year from 1% in June to 19% in January. The monthly variation of the median first-strike peak currents has a maximum in winter and reaches a minimum in July, for both negative and positive currents. The mean diurnal cycle for total CG lightning flashes peaks between 1230 and 1430 UTC (2.2%) and shows a minimum between 0600 and 0800 UTC (0.3%).

Journal

Monthly Weather Review – American Meteorological Society

Published: Feb 20, 2009

References

  • Doppler radar analysis of a Snake River Plain convergence event.
    Andretta
  • Cloud-to-ground lightning characteristics in the Spanish Basque Country area during the period 1992–1996.
    Areitio
  • Parameters of lightning flashes.
    Berger
  • LAMPINET–lightning detection in Italy.
    Biron
  • Breakdown of electric fields in winter storms.
    Brook
  • The electrical structure of the Hokuriku winter thunderstorms.
    Brook
  • Interaction of a warm-season frontal system with the coastal mountains of the western United States. Part II: Evolution of a Puget Sound convergence zone.
    Chien
  • Lightning flash climatology in the southern Great Lakes region.
    Clodman
  • A combined TOA/MDF technology upgrade of the U.S. National Lightning Detection Network.
    Cummins
  • Lightning casualties and damages in the United States from 1959 to 1994.
    Curran
  • The characteristics of lightning occurrence in Southern Germany.
    Finke
  • Cloud-to-ground lightning patterns in New Mexico during the summer.
    Fosdick
  • Characteristics of seven lightning discharges that caused forest fires.
    Fuquay
  • Updated recommendations for lightning safety—1998.
    Holle
  • Ground truth: A positive cloud-to-ground lightning flash.
    Idone
  • Atmospheric Electrical Activity over Romania (in Romanian).
    Iliescu
  • SIMIN—The integrated system for meteorological surveillance, forecast and alert in Romania.
    Ioana
  • Spatial and temporal distributions of lightning over Arizona from a power utility perspective.
    López
  • A topographically forced convergence line in the lee of the Olympic Mountains.
    Mass
  • Characteristics of winter lightning currents in Hokuriku district.
    Nakahori
  • Lightning ground stroke density in the contiguous United States: 1992–95.
    Orville
  • Cloud-to-ground lightning in the United States: NLDN results in the first decade, 1989–98.
    Orville
  • Lightning: Physics and Effects.
    Rakov
  • The relationships between network lightning surface and hourly observations of thunderstorms.
    Reap
  • Ten-year study of cloud-to-ground lightning activity in the Iberian Peninsula.
    Rivas Soriano
  • Cloud-to-ground lightning in Austria: A 10-year study using data from a lightning location system.
    Schulz
  • Mesocyclones in Romania—Characteristics and environments.
    Stan-Sion
  • Topographic distortion of a cold front over the Snake River Plain and central Idaho Mountains.
    Steenburgh
  • Thunderstorm climate of Finland 1998–2007.
    Tuomi
  • Changes in measured lightning flash count and return stroke peak current after the 1994 U.S. National Lightning Detection Network upgrade. 1. Observations.
    Wacker
  • Changes in measured lightning flash count and return stroke peak current after the 1994 U. S. National Lightning Detection Network upgrade. II. Theory.
    Wacker
  • A methodology for predicting the Puget Sound convergence zone and its associated weather.
    Whitney
  • Lightning and lightning fire, central cordillera, Canada.
    Wierzchowski
  • Cloud-to-ground lightning activity in the contiguous United States from 1995 to 1999.
    Zajac