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Article

A Numerical Study of Windstorms in the Lee of the Taebaek Mountains, South Korea: Characteristics and Generation Mechanisms

1
School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
2
Precipitating Convection Group, Max Planck Institute for Meteorology, 20146 Hamburg, Germany
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(4), 431; https://doi.org/10.3390/atmos11040431
Received: 19 February 2020 / Revised: 16 April 2020 / Accepted: 22 April 2020 / Published: 24 April 2020
(This article belongs to the Special Issue Advancements in Mesoscale Weather Analysis and Prediction)
The Yeongdong region, located east of the Taebaek Mountains, South Korea, often experiences severe windstorms in spring, causing a lot of damages, especially when forest fires spread out rapidly by strong winds. Here, the characteristics and generation mechanisms of the windstorms in the Yeongdong region on 8 April 2012 are examined through a high-resolution Weather Research and Forecasting (WRF) model simulation. In the Yangyang area, the steep descent of the isentropes on the lee slope of the mountain and their recovery farther leeward are seen. Inversion layers and incoming flow in hydraulic jump regime suggest that the hydraulic jump is responsible for the downslope windstorm. In the Jangjeon area, the plume-shaped wind pattern extending seaward from the gap exit is seen when the sea-level pressure difference between the gap inside and the gap exit, being responsible for the gap winds, is large. In the Uljin area, downslope windstorms pass over the region with weak wind, low Richardson number, and deep planetary boundary layer (PBL), making banded pattern in the wind and PBL height fields. This study demonstrates that the characteristics of the windstorms in the lee of the Taebaek Mountains and their generation mechanisms differ depending on local topographic features. View Full-Text
Keywords: downslope windstorms; hydraulic jump; gravity waves; gap winds; planetary boundary layer downslope windstorms; hydraulic jump; gravity waves; gap winds; planetary boundary layer
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MDPI and ACS Style

Lee, J.; Seo, J.M.; Baik, J.-J.; Park, S.-B.; Han, B.-S. A Numerical Study of Windstorms in the Lee of the Taebaek Mountains, South Korea: Characteristics and Generation Mechanisms. Atmosphere 2020, 11, 431. https://doi.org/10.3390/atmos11040431

AMA Style

Lee J, Seo JM, Baik J-J, Park S-B, Han B-S. A Numerical Study of Windstorms in the Lee of the Taebaek Mountains, South Korea: Characteristics and Generation Mechanisms. Atmosphere. 2020; 11(4):431. https://doi.org/10.3390/atmos11040431

Chicago/Turabian Style

Lee, Joohyun, Jaemyeong M. Seo, Jong-Jin Baik, Seung-Bu Park, and Beom-Soon Han. 2020. "A Numerical Study of Windstorms in the Lee of the Taebaek Mountains, South Korea: Characteristics and Generation Mechanisms" Atmosphere 11, no. 4: 431. https://doi.org/10.3390/atmos11040431

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