Development mechanisms of an explosive cyclone over East Sea on 3-4 April 2012 SCIE SCOPUS

Cited 12 time in WEB OF SCIENCE Cited 13 time in Scopus
Title
Development mechanisms of an explosive cyclone over East Sea on 3-4 April 2012
Author(s)
Heo, Ki-Young; Seo, Ye-Won; Ha, Kyung-Ja; Park, Kwang-Soon; Kim, Jinah; Choi, Jung-Woon; Jun, Kicheon; Jeong, Jin-Yong
KIOST Author(s)
Heo, Ki Young(허기영)Kim, Jin Ah(김진아)Choi, Jung Woon(최정운)Jun, Ki Cheon(전기천)Jeong, Jin Yong(정진용)
Publication Year
2015-06
Abstract
The development mechanisms of the explosive cyclone that occurred during 3-4 April 2012 over East Sea (Sea of Japan) are examined through numerical simulation and sensitivity experiments using the Weather and Research Forecasting (WRF) model. The characteristics of this explosive cyclone are different from typical cyclonic features observed in this region, including its intensity, deepening rate, and formation time. Numerical simulation, reanalysis data, upper and surface weather charts, and satellite data indicate that the strong baroclinic instability and temperature advection associated with upper-level cut-off low and the interaction of potential vorticity (PV) anomalies between the lower- and upper-level are essential to explosive cyclogenesis. The sensitivity experiments of the explosive cyclone show that latent heat release (LHR) is an important factor in explosive cyclogenesis. The intensification, extent, and movement speed of the cyclone are amplified by LHR as well as the formation of an upper-level cut-off low. The role of LHR is primary important in the generation and evolution of the cyclone. Especially, the LHR contributes to roughly 50% of decrease in sea level pressure (SLP) and 50% of the central cyclone's low-level PV generation in initial stage. During a 48-h simulation, the contributions of the LHR, surface heat flux, and their interaction on the decrease of SLP of the cyclone are found to be 40.6, -8.2, and 10.5%, respectively. These results reveal that the explosive cyclone has larger deepening rates than OJ cyclones, and develops with a large amount of LHR near the cyclone center. (C) 2015 Elsevier B.V. All rights reserved.
ISSN
0377-0265
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2480
DOI
10.1016/j.dynatmoce.2015.03.001
Bibliographic Citation
DYNAMICS OF ATMOSPHERES AND OCEANS, v.70, pp.30 - 46, 2015
Publisher
ELSEVIER SCIENCE BV
Subject
NUMERICAL SIMULATIONS; EXTRATROPICAL CYCLOGENESIS; STATISTICAL-ANALYSIS; FACTOR SEPARATION; STORM LOTHAR; PART I; PACIFIC; CLIMATOLOGY; FORECASTS; MODEL
Keywords
Explosive cyclone; Baroclinic instability; Upper-level cut-off low; Potential vorticity; Latent heat release (LHR)
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCIENCE BV
Related Researcher
Research Interests

Variablility of ocean physical environment,해양물리환경변동

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