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A study of cloud-to...
A study of cloud-to-ground lightning flashes initiated by fast positive breakdown
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- Sabri, Muhammad Haziq Mohammad (författare)
- Univ Tenaga Nas, Inst Sustainable Energy ISE, Jalan IKRAM UNITEN, Kajang 43000, Selangor, Malaysia.;Univ Tenaga Nas, Inst Power Engn IPE, Jalan IKRAM UNITEN, Kajang 43000, Selangor, Malaysia.
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- Ahmad, Mohd Riduan (författare)
- Univ Teknikal Malaysia Melaka, Ctr Telecommun Res & Innovat CeTRI, Atmospher & Lightning Res Lab, Fak Kejuruteraan Elekt dan Kejuruteraan Komputer, Melaka 76100, Malaysia.
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- Al-Kahtani, Ammar Ahmed Nasser (författare)
- Univ Tenaga Nas, Inst Sustainable Energy ISE, Jalan IKRAM UNITEN, Kajang 43000, Selangor, Malaysia.
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- Ab Kadir, Mohd Zainal Abidin (författare)
- Univ Tenaga Nas, Inst Power Engn IPE, Jalan IKRAM UNITEN, Kajang 43000, Selangor, Malaysia.;Univ Putra Malaysia, Adv Lightning Power & Energy Res Ctr ALPER, Serdang 43400, Selangor, Malaysia.
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- Baharin, Shamsul Ammar Shamsul (författare)
- Univ Teknikal Malaysia Melaka, Ctr Telecommun Res & Innovat CeTRI, Atmospher & Lightning Res Lab, Fak Kejuruteraan Elekt dan Kejuruteraan Komputer, Melaka 76100, Malaysia.
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- Lu, Gaopeng (författare)
- Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Anhui, Peoples R China.
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- Zhang, Hongbo (författare)
- Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Observ, Beijing 100029, Peoples R China.
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- Williams, Earle (författare)
- Massachusetts Inst Technol MIT, Cambridge, MA 02139 USA.
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- Cooray, Vernon, 1952- (författare)
- Uppsala universitet,Elektricitetslära
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- Nordin, Farah Hani (författare)
- Univ Tenaga Nas, Inst Power Engn IPE, Jalan IKRAM UNITEN, Kajang 43000, Selangor, Malaysia.
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Univ Tenaga Nas, Inst Sustainable Energy ISE, Jalan IKRAM UNITEN, Kajang 43000, Selangor, Malaysia;Univ Tenaga Nas, Inst Power Engn IPE, Jalan IKRAM UNITEN, Kajang 43000, Selangor, Malaysia. Univ Teknikal Malaysia Melaka, Ctr Telecommun Res & Innovat CeTRI, Atmospher & Lightning Res Lab, Fak Kejuruteraan Elekt dan Kejuruteraan Komputer, Melaka 76100, Malaysia. (creator_code:org_t)
- Elsevier, 2022
- 2022
- Engelska.
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Ingår i: Atmospheric research. - : Elsevier. - 0169-8095 .- 1873-2895. ; 276
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this paper, we examine the initiation event of two tropical negative cloud to ground (CG) lightning flashes within reversal distance (<8 km) detected on 12 (CG1) and 24 (CG2) November 2019, respectively. The CG flashes were recorded using a fast antenna (FA), slow antenna (SA), magnetic field (B-field), and very high frequency (VHF) sensors located at two observation stations (ST1 and ST2) 13.26 km apart. The key finding is that CG1 flash was initiated by a short VHF pulse followed by a VHF burst (fast positive breakdown) while CG2 flash was initiated by a VHF burst (fast positive breakdown) not preceded by a short VHF pulse. The VHF burst was a precursor for initiation of a narrow bipolar event (NBE)-like pulse and initial electric field changes (IECs). Based on the VHF interferometer map, the VHF sources of NBE-like pulses have been propagated upward predominantly vertical. The initiation altitude, total length of the VHF sources propagation, estimated velocity of NBE-like pulse for CG1 flash were 4.5 +/- 0.5 km, 1.9-3.8 km, and 2.4 x 108 to 4.8 x 108 ms-1, respectively, and for CG2 flash were 5.1 +/- 0.8 km, 0.2-3.0 km, and 2.7 x 107 to 4.1 x 108 ms-1, respectively. It is evident that IECs process has been initiated during fast positive streamers propagation. It can be suggested that the IECs process resulted from charge transfer during a fast positive breakdown. The durations and magnitudes of IECs for CG1 flash were 248.5 mu s and 27.97 V/m, respectively, and for CG2 flash were 265.8 mu s and 2.31 V/m, respectively.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Nyckelord
- Fast breakdown
- Initial breakdown pulse
- Initial electric field change
- Interferometer narrow bipolar event
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Sabri, Muhammad ...
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Ahmad, Mohd Ridu ...
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Al-Kahtani, Amma ...
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Ab Kadir, Mohd Z ...
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Baharin, Shamsul ...
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Lu, Gaopeng
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Zhang, Hongbo
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Williams, Earle
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Cooray, Vernon, ...
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Nordin, Farah Ha ...
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