Scholarlink

<p>This research focuses on the high wind refers to a prior study determined the moso-to-misoscale (meso-γ-scale) cyclone (0.02–0.04&#xa0;km) manifested as a highly convergent swirling wind affecting a relatively narrow path, which is broadly mentioned as a weak or gale tornado (F0). This gale tornado (hereafter GT) is also well known in Indonesia as ‘puting beliung.’ However, the plausible mechanism of GTs remains unknown due to the lack of observational measurements detecting short-term extreme events in limited areas of the IMC. Herein, we investigated a GT categorized as Beaufort 8 (56&#xa0;km&#xa0;h<sup>−1</sup>), which had a devastating meso-γ-scale impact over Cimenyan, Bandung, West Java, Indonesia, on 28 March 2021. In this first documentation of storm-induced GTs in the IMC, we combined observational, numerical, and analytical studies using X-band radar imagery and a high-resolution (0.2&#xa0;km) Weather Research and Forecasting (WRF) model to explore the physical and dynamic processes related to that extreme event. Our findings revealed that the GT generated by an isolated system of a short-lived (40-min) bow-echo meso-γ-vortex was the precondition of mesoscale convective complex development on a synoptic scale. The bowing stage was initiated by the genesis of the meso-γ-vortex based on bow-echo end-line theory in the form of mesoscale convergence vortices, organized by several factors including sustained wind, rotational updraft from low-to-surface levels of the troposphere coincides with strong vertical wind shear and a vertical vorticity anomaly. This study demonstrates that the WRF model with the appropriate microphysics scheme and topography succeeded in simulating a real short-lived bow-echo meso-γ-vortex event, with only 10&#xa0;min of early initial discrepancies between the simulated and observed values. Furthermore, the soliton model was applied and was found effective in reproducing velocity spikes by incorporating location-specific parameters. Our examination established a basis mechanism to design better predictions of storm-induced GTs for hydro-meteorological mitigation over the IMC.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

High wind associated with bow echo mesovortex over Cimenyan, Indonesia

  • 期刊论文

  • 发表日期：

    2025年10月21日

查看全文
  • Erma Yulihastin,
  • Ibnu Fathrio,
  • Ginaldi Ari Nugroho,
  • Albertus Sulaiman,
  • Narizka Nanda Purwadani,
  • Halimurrahman,
  • Tiin Sinatra,
  • Suaydhi,
  • Haries Satyawardhana,
  • Asif Awaludin

摘要

This research focuses on the high wind refers to a prior study determined the moso-to-misoscale (meso-γ-scale) cyclone (0.02–0.04 km) manifested as a highly convergent swirling wind affecting a relatively narrow path, which is broadly mentioned as a weak or gale tornado (F0). This gale tornado (hereafter GT) is also well known in Indonesia as ‘puting beliung.’ However, the plausible mechanism of GTs remains unknown due to the lack of observational measurements detecting short-term extreme events in limited areas of the IMC. Herein, we investigated a GT categorized as Beaufort 8 (56 km h−1), which had a devastating meso-γ-scale impact over Cimenyan, Bandung, West Java, Indonesia, on 28 March 2021. In this first documentation of storm-induced GTs in the IMC, we combined observational, numerical, and analytical studies using X-band radar imagery and a high-resolution (0.2 km) Weather Research and Forecasting (WRF) model to explore the physical and dynamic processes related to that extreme event. Our findings revealed that the GT generated by an isolated system of a short-lived (40-min) bow-echo meso-γ-vortex was the precondition of mesoscale convective complex development on a synoptic scale. The bowing stage was initiated by the genesis of the meso-γ-vortex based on bow-echo end-line theory in the form of mesoscale convergence vortices, organized by several factors including sustained wind, rotational updraft from low-to-surface levels of the troposphere coincides with strong vertical wind shear and a vertical vorticity anomaly. This study demonstrates that the WRF model with the appropriate microphysics scheme and topography succeeded in simulating a real short-lived bow-echo meso-γ-vortex event, with only 10 min of early initial discrepancies between the simulated and observed values. Furthermore, the soliton model was applied and was found effective in reproducing velocity spikes by incorporating location-specific parameters. Our examination established a basis mechanism to design better predictions of storm-induced GTs for hydro-meteorological mitigation over the IMC.