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All Journal Jurnal Samudra Geografi
Nonia Mariana Mandala
Politeknik Keuangan Negara - STAN
Humanities Earth & Planetary Sciences Education Environmental Science Social Sciences

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IDENTIFICATION OF A QUASI-LINEAR CONVECTIVE SYSTEM USING WEATHER RADAR DATA IN THE BENGKULU REGION IN 2024 Joseph Damian Cekarus; Nonia Mariana Mandala; Deni Septiadi
Jurnal Samudra Geografi Vol 9 No 2 (2026)
Publisher : Program Studi Pendidikan Geografi, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/jsg.v9i2.14258

Abstract

Quasi-Linear Convective System (QLCS) is a type of linear convective system that can cause extreme weather. There is still little research on QLCS systems in Indonesia, so it is necessary to conduct further research related to the characteristics of QLCS. This research was conducted by identifying QLCS during 2024 in Bengkulu within 150 km range of weather radar to analyze QLCS characteristics in the form of temporal and spatial distribution, formation and decay types, system propagation profiles, and lower layer wind profiles. The radar products used include CMAX, CTR, HWIND, and VSHEAR. The results of this study show that there are 24 QLCS events observed during 2024 in the study area and dominantly occur in December. From the initiation, maturation, to dissipation phases, QLCS mostly occurred in the early morning in the coastal ocean region and most of them were able to last up to 91-120 minutes. In the initiation phase, the QLCS formation process more often occurs with a broken line type. The propagation direction of QLCS tends to the southeast with the dominant speed in the fast moving category (> 7 m/s). The horizontal lower layer wind profile shows that the maximum wind speed is in the range of > 20 knots, while the dominant vertical wind shear encountered in each phase of QLCS life is the strong category.
Co-Authors Deni Septiadi Joseph Damian Cekarus