Characteristics of thunderstorm cores from observations in Yakutia

Kozlov, V. I.; Mullayarov, V. A.; Shabaganova, S. N.

doi:10.1007/s11182-013-0048-y

Cited by 3 publications

(1 citation statement)

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“…We have performed the analysis on two separate subsets of the storms: those with durations less than 1 h ( N = 129) and storms with durations longer than 1 h ( N = 242). This one hour cut is justifiable as it is generally considered the upper bound on the length of a single‐cell storm (Kolzov et al., 2013). It is also the mode of the distribution of storm durations in our sample (see Figure A2) and thus emerges as the natural duration to split the datasets into distinct populations.…”

Section: Methodsmentioning

confidence: 99%

The Relationship Between TGF Production in Thunderstorms and Lightning Flash Rates and Amplitudes

et al. 2021

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We provide evidence that Terrestrial Gamma‐Ray Flashes (TGFs), in well isolated thunderstorms, tend to occur during periods of low and declining flash rates, and when the flash amplitudes are larger than average. This conclusion comes from examining the results of 371 manually tracked TGF‐producing thunderstorms. Fermi‐GBM identified TGFs are used for this analysis and lightning data come from both World Wide Lightning Location Network and Earth Networks Total Lightning Network. The data from these storms suggest that TGFs are likely to occur in almost every phase of storms that last longer than an hour, but tend to occur later on in shorter storms. We also note that, in short storms, TGFs are more likely to accompany a flash when the flash rates of the storm are lower than average, and they are less likely per flash during the peak flash rate periods of the storms. We find that the tendency for TGFs to occur while the flash rate is falling and when the amplitudes of flashes (the sum of the absolute values of peak currents of all constituent sferics in the flash) are larger than average, does not depend strongly on the duration of the storms. This implies that not just any lightning flash can or even will produce a TGF, but that the electrical conditions of the storm play a crucial role in TGF production.

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Section: Methodsmentioning

confidence: 99%

The Relationship Between TGF Production in Thunderstorms and Lightning Flash Rates and Amplitudes

et al. 2021

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Tools for VLF natural radio noise investigation in Yakutsk

Kozlov

Karimov

Korsakov

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Seasonal Variability of Lightning Activity in Yakutia in 2009–2019

Tarabukina

Kozlov

2020

Atmosphere

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The instrumental continuous monitoring of lightning activity in Yakutia has been carried by the lightning direction finder since the 2000s. Devices for detection of sferic (very low frequency radio pulses emitted by lightning discharges) in Yakutia were supplemented in 2009 with relatively short-range (effective detection radius up to 480 km) single-point Stormtracker and LD-250 direction finders from Boltek Corporation (Welland, ON, Canada). The Stormtracker gives a slightly overestimated ratio of CG strokes due to the amplitude threshold of a single-point direction finder, but the device has not changed over the years, which allows for the consideration of the annual dynamics of parameters. In 2009, a sensor in Yakutsk was included in the World Wide Lightning Location Network (WWLLN). The seasonal and diurnal variations of the total lightning stroke number in the central part and the entire area of Yakutia were obtained (up to 1200 km in radius and limited by latitude–longitude boundaries of 105–150° E, 55–75° N). The longest thunderstorm seasons are often observed in the southern part of Yakutia. There was a slight increase in the duration of the thunderstorm season until 2015 in the central part of Yakutia. The interannual variations in the total number of lightning strokes showed periodic fluctuations (with a period of about three years) over the whole area of Yakutia. The periods of high lightning activity shifted within a season from year to year, as revealed by the monthly stroke number variation. Thus, the maximum lightning rate occurred at the beginning of summer, in the middle or at the beginning of August, and had a period of about three years. Every summer, there were 2–3 periods of high lightning activity, resulting from the moving average with a two-week window (according to the longest duration of cyclones). If the periods of high lightning activity shifted toward the beginning of summer, a decrease in the number of days between seasonal peaks was observed. If the maximum shifted to the beginning of August, the number of days between peaks increased. The ratio of cloud-to-ground (CG) lightning strokes and the ratio of negative CG strokes was slightly decreasing by 2015 in the central part of Yakutia.

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Characteristics of thunderstorm cores from observations in Yakutia

Cited by 3 publications

References 1 publication

The Relationship Between TGF Production in Thunderstorms and Lightning Flash Rates and Amplitudes

The Relationship Between TGF Production in Thunderstorms and Lightning Flash Rates and Amplitudes

Tools for VLF natural radio noise investigation in Yakutsk

Seasonal Variability of Lightning Activity in Yakutia in 2009–2019

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