Simulation of snowstorm over the Yellow Sea using a mesoscale coupled model SCIE SCOPUS KCI

Cited 7 time in WEB OF SCIENCE Cited 7 time in Scopus
Title
Simulation of snowstorm over the Yellow Sea using a mesoscale coupled model
Author(s)
Heo, Ki-Young; Kim, Kyung-Eak; Ha, Kyung-Ja; Park, Kwang-Soon; Jun, Ki-Cheon; Shim, Jae-Seol; Suh, Young-Sang
KIOST Author(s)
Jun, Ki Cheon(전기천)Shim, Jae Seol(심재설)
Publication Year
2010-11
Abstract
This study aims to examine the favorable conditions for an ocean effect snowstorm across the Yellow Sea over the southwestern coast of Korea on 21 December 2005, using a coupled model with a Coupled Ocean/Atmosphere Mesoscale Prediction System as the atmospheric component and the Regional Ocean Modeling System as the oceanic component. Simulation of heavy snowfall event, which was 44.3 cm of snow accumulated in 24-hour, was performed to investigate the mesoscale structure, dynamics and development mechanisms in the snowstorm. As a result from 48-hour integration, the results of simulation showed that barotropic instability and turbulent heat fluxes played important roles in the formation of snowstorm. The enhanced surface diabatic heating was dominant in the latent heat flux, and eventually induced convective instability. An additional factor was the favorable condition of synoptic environment, accessing the cold air transport by the approach of the upper-level cold vortex over the warm ocean. Besides these factors, conditional symmetric instability (CSI) is a mechanism which can result in a heavy snowfall with sufficient moisture and upward vertical motion. A slantwise convection from the release of CSI could support a complex snowfall event with heavier than expected amounts. The result comparison between a coupled model and an uncoupled model supports that airsea coupling has an impact of decreasing of about 10% in a snowfall amount on the snowstorm.
ISSN
1976-7633
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4018
DOI
10.1007/s13143-010-0025-0
Bibliographic Citation
ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES, v.46, no.4, pp.437 - 452, 2010
Publisher
KOREAN METEOROLOGICAL SOC
Subject
CONDITIONAL SYMMETRIC INSTABILITY; EQUIVALENT POTENTIAL VORTICITY; 21 JANUARY 1997; JAPAN-SEA; BULK PARAMETERIZATION; POLAR LOW; NUMERICAL-SIMULATION; FRONTAL RAINBANDS; CYCLONES; CLOUD
Keywords
Ocean effect snowstorm; surface diabatic heating; barotropic instability; convective instability; conditional symmetric instability
Type
Article
Language
English
Document Type
Article
Publisher
KOREAN METEOROLOGICAL SOC
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