On the Impact of Meteorological Conditions on the Initiation of Upward Lightning Flashes from Tall Structures

Mostajabi, Amirhossein; Šunjerga, Antonio; Azadifar, Mohammad; Smorgonskiy, Alexander; Rubinstein, Marcos; Rachidi, Farhad; Diendorfer, Gerhard

doi:10.1109/iclp.2018.8503310

Cited by 8 publications

(14 citation statements)

References 30 publications

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“…Even though wind data did not cover all events, measurements at the beginning of each of the three sequences of SIUL were available. Conditions were similar to those reported by Mostajabi et al (), suggesting that wind speed has a bearing on SIUL inception.…”

Section: Discussionsupporting

confidence: 88%

“…Temperature has also a bearing on the proportion between SIUL and LTUL. Mostajabi et al () have reported a mean value of surface air temperature of −0.2 °C for SIUL at Säntis, compared to 8.2 °C for LTUL. Similar results were reported by Zhou et al () for Gaisberg.…”

Section: Discussionmentioning

confidence: 98%

“…Mostajabi et al () have analyzed, on a longer data set of UL at Säntis, the influence of the wind speed on the initiation of SIUL and LTUL. Results showed an increasing percentage of SIUL as a function of the wind speed.…”

Section: Discussionmentioning

confidence: 99%

“…Warner et al (2014) suggested, during blizzard conditions in the United States, that notable winds may have played a key role in SIUL, by "stripping" away much of the corona discharge shielding grounded tall structures. Mostajabi et al (2018) have analyzed, on a longer data set of UL at Säntis, the influence of the wind speed on the initiation of SIUL and LTUL. Results showed an increasing percentage of SIUL as a function of the wind speed.…”

Section: The Role Of Wind In Siul Triggeringmentioning

confidence: 99%

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Meteorological Aspects of Self‐Initiated Upward Lightning at the Säntis Tower (Switzerland)

et al. 2019

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Interest in exploring the meteorological conditions favoring upward lightning from tall man‐made structures has grown in recent years, largely due to the worldwide expansion of wind energy. To this end, instrumented towers existing around the world are the most suitable places to study upward lightning. In this context, an LMA network was deployed around the Säntis Mountain (northeast Switzerland) during the summer of 2017, in order to complement the long‐term measurements currently held at the Säntis telecommunications tower, a lightning hot spot in central Europe. This campaign allowed, for the first time, to gather a comprehensive set of observations of self‐initiated upward lightning emerging from the Tower. With the help of C‐band dual‐polarimetric radar data, the present work focuses on the meteorological conditions conductive to self‐initiated upward lightning from the Säntis. The analysis revealed that the upward propagating positively charged leaders spread mostly horizontal above the melting level, after an initial short vertical path from the tower tip. After this initial stage, the majority of upward leaders were followed by a sequence of negative return strokes. The inception upward lightning under a stratiform cloud shield would be favored by the low height of the charge structure. From the obtained results, it turns out that a key feature favoring self‐initiated upward lightning would be the proximity of the tower tip to the melting level.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: The Role Of Wind In Siul Triggeringmentioning

confidence: 99%

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Meteorological Aspects of Self‐Initiated Upward Lightning at the Säntis Tower (Switzerland)

et al. 2019

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“…The number of ST and OT flashes has been shown to vary depending on the geographical area (e.g., [2]). It is also shown that the rate of ST versus OT flashes is correlated, to some extent, to atmospheric conditions [2][3][4]. Different observation methods have been used to classify flashes into the ST and OT categories, namely based on data from lightning location systems (LLS) [2], electric fields [5], and video observations [6].…”

Section: Introductionmentioning

confidence: 99%

On the Classification of Self-Triggered versus OtherTriggered Lightning Flashes

Šunjerga

Mostajabi

Rachidi

et al. 2018

2018 34th International Conference on Lightning Protection (ICLP)

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We present in this paper lightning current measurements and LMA (Lightning Mapping Array) data associated with upward flashes observed at the Säntis Tower during Summer 2017. The LMA network consists of six stations located in the vicinity of the tower at distances ranging from 100 m to 11 km from it. 20 flashes simultaneously recorded by the current measurement system and the LMA are analyzed. Based on the lightning activity derived from the European Lightning Detection Network (EUCLID) in an area within 30 km from the tower and in a 5-second time window before the start of the flash, all the 20 flashes were classified as 'self-triggered' (ST). However, the investigations based on the LMA data reveal that 3 of the flashes were preceded by nearby activity and should be therefore classified as 'other-triggered' (OT) flashes. The results suggest that the number of OT flashes inferred from LLS data can be underestimated.

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On the conditions for winter lightning at the Eagle Nest Tower (2537 m asl) during the Cerdanya-2017 field experiment

Soula

Pineda

Georgis

et al. 2021

Atmospheric Research

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On the Impact of Meteorological Conditions on the Initiation of Upward Lightning Flashes from Tall Structures

Cited by 8 publications

References 30 publications

Meteorological Aspects of Self‐Initiated Upward Lightning at the Säntis Tower (Switzerland)

Meteorological Aspects of Self‐Initiated Upward Lightning at the Säntis Tower (Switzerland)

On the Classification of Self-Triggered versus OtherTriggered Lightning Flashes

On the conditions for winter lightning at the Eagle Nest Tower (2537 m asl) during the Cerdanya-2017 field experiment

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