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Open AccessArticle

Explosive Cyclogenesis around the Korean Peninsula in May 2016 from a Potential Vorticity Perspective: Case Study and Numerical Simulations

by Ki-Young Heo 1, Kyung-Ja Ha 2,3 and Taemin Ha 4,*
1
Marine Disaster Research Center, Korea Institute of Ocean Science & Technology, Busan 49111, Korea
2
Center for Climate Physics, Institute for Basic Sciences, Busan 34126, Korea
3
Department of Atmospheric Sciences, Pusan National University, Busan 46241, Korea
4
Department of Civil Engineering, Kangwon National University, Samcheok 25913, Korea
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(6), 322; https://doi.org/10.3390/atmos10060322
Received: 23 April 2019 / Revised: 3 June 2019 / Accepted: 4 June 2019 / Published: 12 June 2019
(This article belongs to the Special Issue Weather and Climate Extremes: Current Developments)
An explosive cyclone event that occurred near the Korean Peninsula in early May 2016 is simulated using the Weather Research and Forecasting (WRF) model to examine the developmental mechanisms of the explosive cyclone. After confirming that the WRF model reproduces the synoptic environments and main features of the event well, the favorable environmental conditions for the rapid development of the cyclone are analyzed, and the explosive development mechanisms of the cyclone are investigated with perturbation potential vorticity (PV) fields. The piecewise PV inversion method is used to identify the dynamically relevant meteorological fields associated with each perturbation PV anomaly. The rapid deepening of the surface cyclone was influenced by both adiabatic (an upper tropospheric PV anomaly) and diabatic (a low-level PV anomaly associated with condensational heating) processes, while the baroclinic processes in the lower troposphere had the smallest contribution. In the explosive phase of the cyclone life cycle, the diabatically generated PV anomalies associated with condensational heating induced by the ascending air in the warm conveyor belt are the most important factors for the initial intensity of the cyclone. The upper-level forcing is the most important factor in the evolution of the cyclone’s track, but it is of secondary importance for the initial strong deepening. View Full-Text
Keywords: explosive cyclone; cyclogenesis; piecewise potential vorticity inversion explosive cyclone; cyclogenesis; piecewise potential vorticity inversion
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Heo, K.-Y.; Ha, K.-J.; Ha, T. Explosive Cyclogenesis around the Korean Peninsula in May 2016 from a Potential Vorticity Perspective: Case Study and Numerical Simulations. Atmosphere 2019, 10, 322.

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