Can grounding affect lightning? Observations of lightning parameters in areas with contrasting resistivity

Chisholm, William A.

doi:10.1109/sipda.2017.8116957

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…Additionally, this transition from land to sea conditions is evident around the regions of Sardinia and Corsica. While the conditions of the propagation path have been shown to have an impact on various lightning parameters measured by LLS Chisholm, 2017), the above results support the idea that atmospheric distinctions within thunderclouds play a primary role in the observed land-sea transition of lightning peak currents. Also in this case it is observed that maritime regions exhibiting higher peak current amplitudes have a higher average GSPF.…”

Section: Spatial Characteristicssupporting

confidence: 58%

Insights into ground strike point properties in Europe through the EUCLID Lightning Location System

Poelman,

Kohlmann,

Schulz

2024

Preprint

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Abstract. Evaluating the risk of lightning strikes to a particular structure typically involves adhering to the guidance outlined in IEC 62305-2. Among the multitude of factors influencing the overall risk, flash density emerges as a crucial parameter. According to its definition, each flash is assigned only one contact point to ground. Nevertheless, it is well known that, on average, flashes exhibit multiple ground termination points as shown by high-speed camera observations. In this research, lightning data collected by the European Cooperation for Lightning Detection (EUCLID) network is utilized in combination with a ground strike point (GSP) algorithm that aggregates individual strokes within a flash into ground strike points. This approach enables the examination of spatio-temporal patterns of GSPs across Europe throughout a decade, spanning from 2013 to 2022. Average GSP densities exhibit variations across the European continent, mirroring the observed patterns in flash densities. The highest densities are concentrated along the Adriatic Sea and the western Balkan region, reaching peak values of up to 8.5 GSPs km-2 yr-1. The spatial distribution of the mean number of ground strike points per flash reveals a noticeable increase in the Mediterranean, Adriatic, and Baltic Sea regions compared to inland areas. Moreover, it has been determined that the average number of GSPs per flash reaches its peak between September and November. Additionally, a daily pattern is discernible, with the lowest number of GSPs per flash occurring between 12 and 18 UTC (Universal Time Coordinated). It is found that 95 % of the separation distances between distinct GSPs are less than 6.7 km. Lastly, it is worth noting that the presence of the Alps has an impact on GSP behaviour, resulting in lower GSP counts in comparison to the surrounding areas, along with the shortest average distances between different GSPs.

show abstract

Section: Spatial Characteristicssupporting

confidence: 58%

Insights into ground strike point properties in Europe through the EUCLID Lightning Location System

Poelman,

Kohlmann,

Schulz

2024

Preprint

View full text Add to dashboard Cite

show abstract

Insights into ground strike point properties in Europe through the EUCLID lightning location system

Poelman,

Kohlmann,

Schulz

2024

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Evaluating the risk of lightning strikes to a particular structure typically involves adhering to the guidance outlined in IEC 62305-2. Among the multitude of factors influencing the overall risk, flash density emerges as a crucial parameter. According to its definition, each flash is assigned only one contact point to ground. Nevertheless, it is well known that, on average, flashes exhibit multiple ground termination points as shown by high-speed camera observations. In this research, lightning data collected by the European Cooperation for Lightning Detection (EUCLID) network are utilized in combination with a ground strike point (GSP) algorithm that aggregates individual strokes within a flash into ground strike points. This approach enables the examination of spatio-temporal patterns of GSPs across Europe throughout a decade, spanning from 2013 to 2022. Average GSP densities exhibit variations across the European continent, mirroring the observed patterns in flash densities. The highest densities are concentrated along the Adriatic Sea and the western Balkan region, reaching peak values of up to 8.5 GSPs km−2 yr−1. The spatial distribution of the mean number of ground strike points per flash reveals a noticeable increase in the Mediterranean, Adriatic, and Baltic Sea regions compared to inland areas. Moreover, it has been determined that the average number of GSPs per flash reaches its peak between September and November. Additionally, a daily pattern is discernible, with the lowest number of GSPs per flash occurring between 12:00 and 18:00 UTC (universal time coordinated). It is found that 95 % of the separation distances between distinct GSPs are less than 6.7 km. Lastly, it is worth noting that the presence of the Alps has an impact on GSP behaviour, resulting in lower GSP counts in comparison to the surrounding areas, along with the shortest average distances between different GSPs.

show abstract

Can grounding affect lightning? Observations of lightning parameters in areas with contrasting resistivity

Cited by 2 publications

References 26 publications

Insights into ground strike point properties in Europe through the EUCLID Lightning Location System

Insights into ground strike point properties in Europe through the EUCLID Lightning Location System

Insights into ground strike point properties in Europe through the EUCLID lightning location system

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