Global Electric Circuit research at Graciosa Island (ENA-ARM facility): First year of measurements and ENSO influences

Lopes, Francis M.; Silva, Hugo; Bennett, Alec; Reis, A. Heitor

doi:10.1016/j.elstat.2017.05.001

Cited by 11 publications

(3 citation statements)

References 40 publications

(45 reference statements)

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“…On the one hand, the quasi‐static potential difference of ∼250 kV between the Earth and the lower ionosphere is maintained partly by electric charges that are separated in thunderclouds (Slyunyaev et al., 2019). The vertical electric field (or its negative, the atmospheric electric potential gradient, PG) corresponding to this potential difference can be measured relatively easily also near the surface and it carries the possibility in special circumstances to broadly infer the global state of the DC GEC (Lopes et al., 2017; Nicoll, 2012). On the other hand, lightning strokes in thunderstorms produce radio waves which form the AC part of the GEC as they propagate in the Earth‐ionosphere waveguide (EIWG; Barr et al., 2000; Le Vine, 1987).…”

Section: Introductionmentioning

confidence: 99%

Responses of the AC/DC Global Electric Circuit to Volcanic Electrical Activity in the Hunga Tonga‐Hunga Ha'apai Eruption on 15 January 2022

et al. 2023

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Responses of the AC and DC global electric circuits (GECs) to the large eruption of the Hunga Tonga‐Hunga Ha'apai (HT‐HH) volcano on 15 January 2022 are discussed. The AC‐related investigation is based on Schumann resonance (SR) measurements from six stations on four continents. The DC‐related investigation utilizes atmospheric electric field (potential gradient, PG) measurements from six recording stations in Europe and the USA. According to data from the GLD360 and WWLLN lightning detection networks, the peak lightning stroke rate, 83/s, was dominated by negative polarity lightning, but the distributions of positive and negative lightning discharges in latitude and longitude around the volcano differed. A global intensification of SR is apparent in connection with the enhanced lightning activity caused by the eruption. SR data‐based results confirm that the lightning activity in the eruption dominated the naturally occurring global activity for a period of about 1 hr. The highly localized increase in lightning activity over HT‐HH was a unique point source of SR excitation. PG measurements suggest that impulse‐like charging of the DC GEC, by ∼15%, via negative cloud‐to‐ground lightning strokes took place twice during the eruption. A time constant of 7 or 8 min has been inferred for near‐surface PG changes due to these enhancements. This could be the first direct measurement of the time constant of the GEC near the Earth's surface, as well as the first observation of the direct charging of the DC GEC by a unique atmospheric electrified source.

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Section: Introductionmentioning

confidence: 99%

Responses of the AC/DC Global Electric Circuit to Volcanic Electrical Activity in the Hunga Tonga‐Hunga Ha'apai Eruption on 15 January 2022

et al. 2023

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“…The first measurements of a predominantly experimental nature began more than 150 years ago. The modern level of instrumentation contributed to the organization of global systematic observations of electrical quantities such as the potential gradient, electrical conductivity of air, ion concentration, current density, and others [1][2][3][4][5][6][7][8]. Today, ground-based measurements provide information about the electrical state of the atmosphere, and different approaches to data selection and processing have allowed us to draw fundamental conclusions about the influence of fair weather and disturbed weather conditions [6,[11][12][13][14][15][16][17][18][19][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] on the surface atmospheric electricity.…”

Section: Introductionmentioning

confidence: 99%

The Electric State of the Surface Atmosphere in the Mountain–Steppe Landscapes of Southern Siberia According to the Measurement Data in the Khakass–Tyva Expedition in 2022

Pustovalov,

Nagorskiy,

Oglezneva

et al. 2023

Atmosphere

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Currently, many researchers are interested in investigating the electric field in the fair-weather electric environment, along with its diurnal and seasonal variations across all regions of the world. However, a similar study in the southern part of Siberia has not yet been carried out. In this regard, this study aims to estimate the mean values of the electric field and their variations in the mountain and steppe landscapes using the measurement data from the Khakass–Tyva expedition in 2022. The maximum values of positive ion density were noted at the site in the Iyussko-Shirinsky steppe between Belyo and Tus salt lakes in the Khakass-Minusinsk Basin. The maximum values of negative ion density were observed at the site in the Shol tract in the center part of the Tyva depression. The potential gradient tends to increase with altitude and reaches a maximum in the highlands. The maximum values of the potential gradient were noted in the highlands plateau near the Mongun-Taiga Mountain Massif and Khindiktig-Khol Lake. The diurnal cycles of potential gradient at different observation sites were divided into two groups: (1) a diurnal cycle in the form of a double wave; and (2) a daily cycle with a more complex course due to the strong influence of local factors.

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“…The first measurements of a predominantly experimental nature began more than 150 years ago. Improvements to existing instrumentation contributed to the organization of global systematic observations of electrical quantities such as the potential gradient (φ), electrical conductivity of air, ion concentration, current density, and others [1][2][3][4][5][6][7][8]. Today, numerous ground-based measurements provide information about the electrical state of the atmosphere,and different approaches [1,6,9] to data selection and processing have allowed us to draw fundamental conclusions about the influence of fair-weather and disturbed weather conditions [6,[11][12][13][14][15][16][17][18][19][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] on the surface atmospheric electricity.…”

Section: Introductionmentioning

confidence: 99%

The Atmospheric Electric Field under Fair-Weather Conditions in the South of Western Siberia based on Observations in Tomsk in 2006–2020

Pustovalov¹,

Nagorskiy²,

Oglezneva³

et al. 2022

Which Factors Contribute to Innovative Performance? A Case Study Applied to the Food and Beverage Industry

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Currently, many researchers have an interest in the investigation of the electric field in the fair-weather electric environment along with its diurnal and seasonal variations across all regions of the world. However, a similar study in the southern part of Western Siberia has not yet been carried out. In this regard, the paper aims to estimate the mean values of the electric field and their variations in this area using the example of Tomsk. The time series of one-minute average potential gradient values as well as other quantities obtained from the geophysical observatory of the Institute of Monitoring of Climatic and Ecological Systems of the Siberian Branch of the Russian Academy of Sciences (IMCES SB RAS, Tomsk, Russia) from 2006 to 2020 is used in this study. The mean annual value of the potential gradient in Tomsk is 282 V/m and usually varies from 161 to 372 V/m. The diurnal variations in potential gradient per year on average are characterized by oscillations of the continental type with a double maximum and minimum. The main minimum of diurnal www.videleaf.com variations is 7 h and the main maximum is 21 h of local time (00 and 14 UTC, respectively). According to the annual mode, the maximum potential gradient is observed in February, and the minimum is recorded in June. The average values and range of the potential gradient in warm periods are 1.2 and 1.5 times less than in cold periods.

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Global Electric Circuit research at Graciosa Island (ENA-ARM facility): First year of measurements and ENSO influences

Cited by 11 publications

References 40 publications

Responses of the AC/DC Global Electric Circuit to Volcanic Electrical Activity in the Hunga Tonga‐Hunga Ha'apai Eruption on 15 January 2022

Responses of the AC/DC Global Electric Circuit to Volcanic Electrical Activity in the Hunga Tonga‐Hunga Ha'apai Eruption on 15 January 2022

The Electric State of the Surface Atmosphere in the Mountain–Steppe Landscapes of Southern Siberia According to the Measurement Data in the Khakass–Tyva Expedition in 2022

The Atmospheric Electric Field under Fair-Weather Conditions in the South of Western Siberia based on Observations in Tomsk in 2006–2020

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