유사 태풍들에 대한 황해 반응 수치 실험

Title
유사 태풍들에 대한 황해 반응 수치 실험
Alternative Title
Numerical experiments on the response of the Yellow Sea to the comparable typhoons
Author(s)
조경호; 현상권; 최진용; 박광순; 권재일
KIOST Author(s)
Choi, Jin Yong(최진용)Kwon, Jae Il(권재일)
Alternative Author(s)
조경호; 최진용; 박광순; 권재일
Publication Year
2012-12-03
Abstract
The response of the Yellow Sea to forcing from typhoons is investigated using an unstructured-grid three-dimensional hydrodynamic model. The Yellow Sea has been hit by 4~5 typhoons averagely every year. During Typhoon Meari in 2011, the model results agree reasonably well with field observations of storm surge, water velocity, water temperature, and salinity. Diagnostic numerical experiments are conducted to examine barotropic and baroclinic responses of the Yellow Sea to three comparable super typhoons. The typhoons chosen for the study are Typhoon Winnie (9713), Typhoon Maemi (0314), and Typhoon Muifa (1109), which passed over the Yellow Sea and East China Sea with the intensity of category 1 or 2 and distinct tracks. From the Yellow Sea’s water level response to the typhoons, it is found that the initial setup is similarly induced by the remote winds but the responses to the three typhoons’ local winds are significantly different. As local wind fields over the Yellow Sea are determined by a typhoon track, locally wind-induced set-up and set-down during three typhoons result in the distinguished features of storm surge generation and propagation. Typhoon Muifa which passed through the middle of the Yellow Sea tends to generate larger storm surge on the east coast of China than other two typhoons do. Easterly winds during Typhoon Muifa push the water to the west and continuously reinforce the initial setup induced by its remote winds. From the perspective of vertical mixing and stratification, it is evident that local wind stress tends to play a key role in modulating baroclinic circulation in the Yellow Sea. To characterize vertical mixing conditions in the Yellow Sea during individual typhoons, a modified horizontal Richardson number that incorporates wind stress, wind direction, horizontal density gradient, and vertical eddy viscosity is used for three typhoons. Finally, the influences of continental shelf dynamics on the Yellow Sea’s response to the typhoons
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/27267
Bibliographic Citation
AGU Fall Meeting 2012, pp.1, 2012
Publisher
American
Type
Conference
Language
English
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