Scholarlink

<p>Tropical cyclogenesis in the Bay of Bengal (BoB) and Arabian sea is significantly modulated by dynamic and thermodynamic conditions during warm El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) events. The current study investigates the parameters such as sea surface temperature, vertical wind shear, wind and wind vectors, mid-level relative humidity, low-level relative vorticity, and cloud covers that are conducive to genesis of tropical cyclone and its intensity in the BoB and the Arabian sea during Indian post-monsoon season. This study includes one tropical cyclone named “Titli” in the BoB and another named “Chapala” in the Arabian sea. The role of ocean heat content at 0-700&#xa0;m depth was also discussed for the seasons April–May-June and October–November-December. Results show that warm ENSO-IOD events enhance low-level convergence, upper-level divergence, and weak wind shear, creating an environment favouring the tropical cyclogenesis. Thermodynamically, warm waters provide a significant source of latent heat through evaporation. Rising moist air cools and condenses, releasing latent heat and fuelling the intense convection. Thermodynamic conditions, particularly under ENSO-IOD events, when coupled with favourable dynamical factors such as low vertical wind shear, positive vorticity significantly contribute to the genesis and intensification of tropical cyclones in the BoB and the Arabian sea. This study highlights the critical role of dynamic and thermodynamic interactions in tropical cyclogenesis during warm ENSO-IOD events, providing insights for improved predictability and mitigation strategies.</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

Dynamic and thermodynamic conditions influencing the tropical cyclogenesis in the Bay of Bengal and Arabian sea during warm ENSO-IOD event: a case study

  • 期刊论文

  • 发表日期：

    2025年6月13日

查看全文
  • Kanak Lata Xalxo,
  • Biranchi Kumar Mahala,
  • Ashish Routray,
  • Pratap Kumar Mohanty

摘要

Tropical cyclogenesis in the Bay of Bengal (BoB) and Arabian sea is significantly modulated by dynamic and thermodynamic conditions during warm El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) events. The current study investigates the parameters such as sea surface temperature, vertical wind shear, wind and wind vectors, mid-level relative humidity, low-level relative vorticity, and cloud covers that are conducive to genesis of tropical cyclone and its intensity in the BoB and the Arabian sea during Indian post-monsoon season. This study includes one tropical cyclone named “Titli” in the BoB and another named “Chapala” in the Arabian sea. The role of ocean heat content at 0-700 m depth was also discussed for the seasons April–May-June and October–November-December. Results show that warm ENSO-IOD events enhance low-level convergence, upper-level divergence, and weak wind shear, creating an environment favouring the tropical cyclogenesis. Thermodynamically, warm waters provide a significant source of latent heat through evaporation. Rising moist air cools and condenses, releasing latent heat and fuelling the intense convection. Thermodynamic conditions, particularly under ENSO-IOD events, when coupled with favourable dynamical factors such as low vertical wind shear, positive vorticity significantly contribute to the genesis and intensification of tropical cyclones in the BoB and the Arabian sea. This study highlights the critical role of dynamic and thermodynamic interactions in tropical cyclogenesis during warm ENSO-IOD events, providing insights for improved predictability and mitigation strategies.