Investigation on the occurrence of positive cloud to ground (+CG) lightning in UMP Pekan

Chan, Hwee Geem; Mohamed, Amir Izzani

doi:10.1016/j.jastp.2018.07.016

Cited by 10 publications

(10 citation statements)

References 10 publications

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“…As a result, a total of 2,019,923 flashes were detected in this study, consisting of 43.01% +CG and 56.99% −CG flashes. The results, presented in Table 2, show that the amount of +CG flashes found was very significant at 43% and the ratio of +CG to −CG flashes was relatively high as compared with previous studies on observation and occurrences of +CG flashes carried out in other geographical regions [6,7,10,36,37,39]. In general, around 90% of the total CG flashes found were −CG while the other 10% were +CG [1,5,40].…”

Section: Observation and Occurrence Of Cg Lightning Flashes In The Wementioning

confidence: 55%

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Seasonal Analysis of Cloud-To-Ground Lightning Flash Activity in the Western Antarctica

et al. 2019

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This paper presents a seasonal analysis of cloud-to-ground (CG) lightning flash activity in the Western Antarctica using a lightning detector sensor installed at the Carlini Base station. Data obtained from the detection system between February and December 2017 were analyzed. Three common locations and areas of composite active thunderstorms (labelled storm regions A, B, and C) were detected by the sensor within a 1000 km radius from the station. Storm region A was located to the northwest (N/W) of the station and covered the Amundsen/Bellingshausen Sea (ABS), whereas storm region C was located on the southeastern (S/E) side of the station over the Weddell Sea (WS), with distances ranging from 500 to 800 km and bearings of 270° to 360° and 90° to 180, respectively. Storm region B was located around 100 km from the station with the bearings of stroke taken from 0° to 360°. A total of 2,019,923 flashes were detected, of which 43.01% were positive CG and 56.99% were negative CG flashes. The analysis revealed that more than 96% of the CG flashes (both positive CG and negative CG) were produced during the summer and fall seasons as compared with less than 4% during the winter and spring seasons. Most detected lightning strokes (>85%) were located in the central area around the station produced by storm region B and less than 15% were produced by storm region A and storm region C, located in the ocean areas over the Amundsen/Bellingshausen Sea and the Weddell Sea.

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Section: Observation and Occurrence Of Cg Lightning Flashes In The Wementioning

confidence: 55%

“…Recent studies by Chan and Mohamed [6] examined the occurrence of tropical +CG lightning and its relationship with the monsoon season in Pekan, Malaysia. Their findings revealed that of the total lightning flashes, 21.91% were +CG and 78.09% were -CG flashes.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Analysis of Cloud-To-Ground Lightning Flash Activity in the Western Antarctica

et al. 2019

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“…Table 1 shows the statistical information on +CG flash occurrence in Malaysia and Indonesia. [9], [10], and [11] recorded 21.91%, 2.10% and 33.14% +CG lightning respectively. [9] and [11] shows a significantly high +CG lightning percentage while [10] reported an acceptable value of +CG percentage.…”

Section: Resultsmentioning

confidence: 95%

“…[9], [10], and [11] recorded 21.91%, 2.10% and 33.14% +CG lightning respectively. [9] and [11] shows a significantly high +CG lightning percentage while [10] reported an acceptable value of +CG percentage. [12] discovered a numerous +CG data from a single storm with 102 event which is extraordinary abundance from a single storm.…”

Section: Resultsmentioning

confidence: 95%

“…Based on [8] due to scarcity of data, +CG lightning studies in Malaysia and Indonesia is minimal even though Malaysia is located near the equator. In 2018, [9] has done an investigation on the occurrence of +CG lightning in UMP Pekan, Malaysia .They presented the occurrence of both +CG lightning and -CG according to data obtained from Malaysia Meteorological Department (MMD). The MMD has and uses a surveillance system named SAFIR 3000 that has eight sensors installed around Peninsular Malaysia.…”

Section: Introductionmentioning

confidence: 99%

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Unravel the extent of the existence of positive ground flash in Malaysia

Munauwer¹

2020

IJETER

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Positive cloud-to-ground flash (+CG) in tropic countries such as Malaysia is not common. However, some studies in Malaysia reported that the +CG in Malaysia occur more than the nominal percentage of 10 %. The uncertainty feature as mentioned above motivates the authors to stratify the +CG from 135 electric field data acquired in two different thunderstorms recorded in Melaka, Malaysia. To ensure consistency of the measurement, the accurate stroke count technique that widely have been used by majority lightning investigators was utilized in Universiti Teknikal Malaysia Melaka measurement station. The electric fields were recorded with nanosecond resolution using High Definition Lecroy. The signal of lightning study within few Hz to tens of MHz, were detected by the combination of parallel plate antenna and voltage follower amplifier. In summary, negative cloud to ground flashes (-CG), +CG and cloud flash (CC) were found to have 123(91%), 6 (4.44%) and 6 (4.44%), respectively. Further, comparison study has shown that there is no consistency in previous studies in Malaysia and Indonesia and lead to uncertainty. Overall, it is extremely important to all researchers in tropical region to realize that the positive lightning has to be scrutinized carefully and still open into a big question in presenting a proper manner.

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Analysis of lightning flash rate with the occurrence of flash floods and hailstorms in Peninsular Malaysia

Bahari

Mohammad

Esa

et al. 2023

Journal of Atmospheric and Solar-Terrestrial Physics

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Investigation on the occurrence of positive cloud to ground (+CG) lightning in UMP Pekan

Cited by 10 publications

References 10 publications

Seasonal Analysis of Cloud-To-Ground Lightning Flash Activity in the Western Antarctica

Seasonal Analysis of Cloud-To-Ground Lightning Flash Activity in the Western Antarctica

Unravel the extent of the existence of positive ground flash in Malaysia

Analysis of lightning flash rate with the occurrence of flash floods and hailstorms in Peninsular Malaysia

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