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KMID : 1024520140230030409
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Journal of the Environmental Sciences
2014 Volume.23 No. 3 p.409 ~ p.431
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The Characteristics in the Simulation of High-resolution Coastal Weather Using the WRF and SWAN Models
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Son Go-Eun
Jeong Ju-Hee
Kim Hyeon-Su
Kim Yoo-Keun
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Abstract
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In this study, the characteristics in the simulation of high-resolution coastal weather, i.e. sea surface wind (SSW) and
significant wave height (SWH), were studied in a southeastern coastal region of Korea using the WRF and SWAN models.
This analyses was performed based on the effects of various input factors in the WRF and SWAN model during M-Case
(moderate days with average 1.8 m SWH and 8.4 ms-1 SSW) and R-Case (rough days with average 3.4 m SWH and 13.0 ms-1SSW) according to the strength of SSW and SWH. The effects of topography (TP), land cover (LC), and sea surface
temperature (SST) for the simulation of SSW with the WRF model were somewhat high on v-component winds along the
coastline and the adjacent sea of a more detailed grid simulation (333 m) during R-Case. The LC effect was apparent in all grid simulations during both cases regardless of the strength of SSW, whereas the TP effect had shown a difference (decrease or increase) of wind speed according to the strength of SSW (M-Case or R-Case). In addition, the effects of monthly mean currents (CR) and deepwater design waves (DW) for the simulation of SWH with the SWAN model predicted good agreement with observed SWH during R-Case compared to the M-Case. For example, the effects of CR and DW contributed to the increase of SWH during R-Case regardless of grid resolution, whereas the differences (decrease or increase) of SWH occurred according to each effect (CR or DW) during M-Case.
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KEYWORD
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Coastal weather, Sea surface wind, Significant wave height, High-resolution, WRF, SWAN, Land cover, Topography, SST, Current, Deepwater design wave
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