Dear Colleagues and Students,

The State Key Laboratory of Internet of Things for Smart City would like to invite you to join our “IOTSC Talk Series” on 23/09/2025 (Tuesday). We are pleased to invite Dr. Zhenhui YI from National University of Defense Technology as the speaker.

Submesoscale Variation Characteristics and Energy Cascade in the Northern South China Sea Induced by Tropical Cyclone Forcing
Speaker: Dr. Zhenhui YI
Date: 23/09/2025 (Tuesday)
Time: 10:00 – 11:00
Language: Mandarin
Venue: N21-5010

Abstract:
Combining underwater glider observations and high-resolution numerical modeling, we examines submesoscale baroclinic instabilities induced by TCs Roke and Haitang in NSCS. TC Haitang triggered substantial surface cooling, mixed layer deepening, frontal sharpening, and intensified baroclinic and symmetric instabilities within the mixed layer. Following the typhoon, submesoscale kinetic energy increased markedly, exhibiting strong correlation with enhanced mesoscale strain rates. Energetics analysis revealed that this increase was predominantly driven by the release of potential energy through baroclinic conversion. Sensitivity experiments further demonstrated that turbulent heat flux and Ekman buoyancy flux contributed equally to the baroclinic energy conversion during TC Haitang.

Speaker’s Bio:
Dr. Zhenhui YI is a lecturer at the College of Meteorology and Oceanography, National University of Defense Technology. He graduated from Sun Yat-sen University in 2023, obtaining a Ph.D. in Physical Oceanography. His research focuses on mesoscale eddy deformation and submesoscale processes in the ocean. In recent years, his main research achievements include: clarifying the heat and salt transport and its dynamics induced by the deformation of slope intrusion mesoscale eddies; revealing the variation characteristics of submesoscale processes and their energy cascade under tropical cyclone forcing; and analyzing the dynamical drivers of the summer chlorophyll dipole distribution in the Bay of Bengal. Related findings have been published in journals such as JGR: Oceans.

All are welcome!

For enquiries: Tel: 8822 9159
Email: frankielei@um.edu.mo

Best Regards,
State Key Laboratory of Internet of Things for Smart City