Lightning activity in the north of Yakutia in 2009-2020

2021 ◽  
Author(s):  
Lena D. Tarabukina ◽  
Vladimir I. Kozlov
Keyword(s):  
Lightning Activity ◽  
The North

STATISTICAL ANALYSIS OF LIGHTNING ACTIVITY IN THE NORTH CAUCASUS

2021 ◽  
pp. 112-115
Author(s):  
M. V. Zharashuev ◽  
Keyword(s):  
Statistical Analysis ◽  
Lightning Activity ◽  
Statistical Characteristics ◽  
North Caucasus ◽  
The North

Statistical analysis of lightning activity in the North Caucasus and Stavropol Territory depending on orography is carried out. The statistical characteristics of lightning for the period 2009-2018 on the territory of 173056 km2 were analyzed.

scholarly journals Public Knowledge, Perceptions and Practices in the High-Risk Lightning Zone of South Africa

2021 ◽  
Vol 18 (14) ◽  
pp. 7448
Author(s):  
Inocent Moyo ◽  
Sifiso Xulu
Keyword(s):  
Mitigation Strategies ◽  
Lightning Activity ◽  
Public Knowledge ◽  
Community Members ◽  
Economic Implications ◽  
Explorative Study ◽  
The North ◽  
North Eastern ◽  
Community Risk ◽  
Hazard And Risk

Lightning activity is a hazard for human societies and the environment, and a common feature of South Africa’s climate system, although with great regional variation. The north-eastern section of the country, including the predominantly rural uMkhanyakude District Municipality, is among the most vulnerable regions, where a growing trend of lightning-related deaths and injuries has been observed in recent years. Despite this, and the Disaster Management Act (No. 57 of 2002), which mandates the implementation of hazard and risk assessments at all scales, no detailed research on the community risk perception of lightning incidents has yet been conducted, although such information could help to facilitate mitigation strategies. This explorative study involved a questionnaire survey of 150 community members that aimed to address this gap. Our results suggest that lightning is a real danger and the community had failed to effectively and successfully respond to its various socio-economic implications at the community and individual levels; this demonstrated the vulnerability of the community to the lightning activity in the study area. The contribution of this study is the identification and explanation of how lightning is regarded, understood, interpreted and responded to and how this information provides an opportunity for effective government intervention.

scholarly journals Spatio-temporal variability of lightning activity in Europe and the relation to the North Atlantic Oscillation teleconnection pattern

2017 ◽  
Author(s):  
David Piper ◽  
Michael Kunz
Keyword(s):  
North Atlantic Oscillation ◽  
North Atlantic ◽  
Temporal Variability ◽  
Lightning Activity ◽  
Convective Activity ◽  
Diurnal Cycles ◽  
The North ◽  
The North Atlantic ◽  
Spatio Temporal ◽  
The North Atlantic Oscillation

Abstract. Comprehensive lightning statistics are presented for a large, contiguous domain covering several European countries such as France, Germany, Austria, or Switzerland. Spatio-temporal variability of convective activity is investigated based on a 14-year time series (2001–2014) of lightning data. Based on the binary variable thunderstorm day, the mean spatial patterns of lightning activity and regional peculiarities regarding seasonality are discussed. Diurnal cycles are compared among several regions and evaluated with respect to major seasonal changes. Further analyzes are performed regarding interannual variability and the impact of teleconnection patterns on convection. Mean convective activity across central Europe is characterized by a strong northwest-to-southeast gradient with pronounced secondary features superimposed. The zone of maximum values of thunderstorm days propagates southwestward along the southern Alpine range from April to July. Diurnal cycles vary substantially both between different months and regions, particularly regarding the incidence of nighttime lightning. The North Atlantic Oscillation (NAO) is shown to have a significant impact on convective activity in several regions, pointing to a crucial role of large-scale flow in steering spatio-temporal patterns of convective activity.

scholarly journals Estimation of anthropogenic impact on lightning activity over urbanized areas of Northeast Asia

2019 ◽  
Vol 127 ◽  
pp. 01002
Author(s):  
Lena Tarabukina ◽  
Dmitriy Innokentiev
Keyword(s):  
Eastern China ◽  
Russian Far East ◽  
Far East ◽  
Northeast Asia ◽  
Temporal Variations ◽  
Lightning Activity ◽  
Large Cities ◽  
The North ◽  
Surrounding Areas ◽  
The City

The anthropogenic influence on lightning activity is revealed by an increase in the density of lightning stroke in the places with accumulation of artificial products in air and by an additional period of one week in temporal variations. In this study, a comparative analysis of the density of lightning strokes within the city (with a resolution of 0.25 degrees along longitude-latitude) and the surrounding areas (up to 0.5 degrees around the city center cell). The observations were carried out using the World Wide Lightning network (WWLLN), one of the sensors of which was installed in Yakutsk in 2009. We selected cities within the territory of 60-180E, 40-80N. Selected cities in Siberia and Russian Far East have a population of more than 50 thousand – 57 cities. Due to the high population density in the North-Eastern China, we selected only large cities with a metropolitan population of more than 400 thousand people – 26 cities. The urban effect could be revealed in about 20% of cities. The 4-, 7-, 25-day period was found in variations of lightning number around cities.

scholarly journals Winter Lightning and North Atlantic Oscillation

2007 ◽  
Vol 135 (7) ◽  
pp. 2810-2815 ◽  
Author(s):  
Fernando de Pablo ◽  
Luis Rivas Soriano
Keyword(s):  
North Atlantic Oscillation ◽  
North Atlantic ◽  
Lightning Activity ◽  
Lightning Flash ◽  
Eastern Area ◽  
The North ◽  
European Area ◽  
Nao Index ◽  
The North Atlantic ◽  
The North Atlantic Oscillation

Abstract The relationship between the North Atlantic Oscillation (NAO) and total (in cloud and cloud to ground) lightning activity during the wintertime (December to March) is analyzed. Lightning data from the Optical Transient Detector were used and were studied in the North Atlantic and western European area. The southern half of the area analyzed (latitudes lower than ∼50°N) was observed to have an increased (decreased) lightning flash rate associated with negative (positive) NAO index values. The opposite relationship was found when the northern half (latitudes higher than ∼50°N) was considered. In both cases, the effect of the NAO on the lightning activity was stronger over the eastern area analyzed. Low (clearly <1) absolute values of the NAO index seem to be associated with minimum lightning activity.

scholarly journals Spatiotemporal variability of lightning activity in Europe and the relation to the North Atlantic Oscillation teleconnection pattern

2017 ◽  
Vol 17 (8) ◽  
pp. 1319-1336 ◽  
Author(s):  
David Piper ◽  
Michael Kunz
Keyword(s):  
North Atlantic Oscillation ◽  
North Atlantic ◽  
Large Scale ◽  
Lightning Activity ◽  
Spatiotemporal Variability ◽  
Convective Activity ◽  
Diurnal Cycles ◽  
The North ◽  
The North Atlantic ◽  
The North Atlantic Oscillation

Abstract. Comprehensive lightning statistics are presented for a large, contiguous domain covering several European countries such as France, Germany, Austria, and Switzerland. Spatiotemporal variability of convective activity is investigated based on a 14-year time series (2001–2014) of lightning data. Based on the binary variable thunderstorm day, the mean spatial patterns of lightning activity and regional peculiarities regarding seasonality are discussed. Diurnal cycles are compared among several regions and evaluated with respect to major seasonal changes. Further analyses are performed regarding interannual variability and the impact of teleconnection patterns on convection. Mean convective activity across central Europe is characterized by a strong northwest-to-southeast gradient with pronounced secondary features superimposed. The zone of maximum values of thunderstorm days propagates southwestward along the southern Alpine range from April to July. Diurnal cycles vary substantially between both different months and regions, particularly regarding the incidence of nighttime lightning. The North Atlantic Oscillation (NAO) is shown to have a significant impact on convective activity in several regions, which is primarily caused by variations of the large-scale lifting pattern in both NAO phases. This dynamical effect is partly compensated for by thermodynamical modifications of the pre-convective environment. The results point to a crucial role of large-scale flow in steering the spatiotemporal patterns of convective activity.

Investor-State Dispute Settlement under NAFTA Chapter 11: The Shape of Things to Come?

1998 ◽  
Vol 35 ◽  
pp. 263-290
Author(s):  
J. Anthony VanDuzer
Keyword(s):  
Free Trade Agreement ◽  
Dispute Settlement ◽  
Trade Agreement ◽  
Minimum Standards ◽  
The North ◽  
State Behaviour ◽  
Nafta Chapter 11 ◽  
To Come ◽  
The Right

SummaryRecently, there has been a proliferation of international agreements imposing minimum standards on states in respect of their treatment of foreign investors and allowing investors to initiate dispute settlement proceedings where a state violates these standards. Of greatest significance to Canada is Chapter 11 of the North American Free Trade Agreement, which provides both standards for state behaviour and the right to initiate binding arbitration. Since 1996, four cases have been brought under Chapter 11. This note describes the Chapter 11 process and suggests some of the issues that may arise as it is increasingly resorted to by investors.

Long-term Cyclic Variations of Prominences, Green and Red Coronae over Solar Cycles

2000 ◽  
Vol 179 ◽  
pp. 201-204
Author(s):  
Vojtech Rušin ◽  
Milan Minarovjech ◽  
Milan Rybanský
Keyword(s):  
Emission Lines ◽  
High Latitudes ◽  
Green Line ◽  
Solar Cycles ◽  
The South ◽  
Coronal Emission ◽  
Local Maxima ◽  
The North ◽  
Cyclic Variations

AbstractLong-term cyclic variations in the distribution of prominences and intensities of green (530.3 nm) and red (637.4 nm) coronal emission lines over solar cycles 18–23 are presented. Polar prominence branches will reach the poles at different epochs in cycle 23: the north branch at the beginning in 2002 and the south branch a year later (2003), respectively. The local maxima of intensities in the green line show both poleward- and equatorward-migrating branches. The poleward branches will reach the poles around cycle maxima like prominences, while the equatorward branches show a duration of 18 years and will end in cycle minima (2007). The red corona shows mostly equatorward branches. The possibility that these branches begin to develop at high latitudes in the preceding cycles cannot be excluded.

Sign in / Sign up

Export Citation Format

Share Document