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Sensitivity Analysis of Wind-Wave Growth Parameter during Typhoon Season in Summer for Developing an Integrated Global/Regional/Coastal Wave Prediction System

전지구․지역․국지연안 통합 파랑예측시스템 개발을 위한 여름철 태풍시기 풍파성장 파라미터 민감도 분석

Youjung Oh12
,
Sang Meong Oh2
,
Pil-Hun Chang3
,
KiRyong Kang3
,
Il-Ju Moon12*
오 유정12
,
오 상명2
,
장 필훈3
,
강 기룡3
,
문 일주12*
1Typhoon Research Center, Jeju National University, Jeju 63243, Korea
2Graduate School of Interdisciplinary Program in Marine Meteorology, Jeju National University, Jeju 63243, Korea
3Operational Systems Development Department, National Institute of Meteorological Science, Jeju 63568, Korea
1제주대학교 태풍연구센터 (63243) 제주특별자치도 제주시 제주대학로 102
2제주대학교 해양기상학협동과정 (63243) 제주특별자치도 제주시 제주대학로 102
3국립기상과학원 현업운영개발부 (63568) 제주특별자치도 서귀포시 서호북로 33
*Corresponding Author
30 September 2021. pp. 179-192
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Abstract

In this study, an integrated wave model from global to coastal scales was developed to improve the operational wave prediction performance of the Korean Meteorological Administration (KMA). In this system, the wave model was upgraded to the WaveWatch III version 6.07 with the improved parameterization of the source term. Considering the increased resolution of the wind input field and the introduction of the high-performance KMA 5th Supercomputer, the spatial resolution of global and regional wave models has been doubled compared to the operational model. The physical processes and coefficients of the wave model were optimized for the current KMA global atmospheric forecasting system, the Korean Integrated Model (KIM), which is being operated since April 2020. Based on the sensitivity experiment results, the wind-wave growth parameter (βmax) for the global wave model was determined to be 1.33 with the lowest root mean square errors (RMSE). The value of βmax showed the lowest error when applied to regional/coastal wave models for the period of the typhoon season when strong winds occur. Applying the new system to the case of August 2020, the RMSE for the 48-hour significant wave height prediction was reduced by 13.4 to 17.7% compared to the existing KMA operating model. The new integrated wave prediction system plans to replace the KMA operating model after long-term verification.

Keywords
wave prediction
wavewatch III
significant wave height
wind-wave growth parameter
typhoon
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국문 참고자료의 영문표기 English translation / Romanization of references originally written in Korean

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Information
  • Publisher :Korea Institute of Ocean Science and Technology
  • Publisher(Ko) :한국해양과학기술원
  • Journal Title :Ocean and Polar Research
  • Journal Title(Ko) :Ocean and Polar Research
  • Volume : 43
  • No :3
  • Pages :179-192
  • Received Date : 2021-04-19
  • Revised Date : 2021-06-10
  • Accepted Date : 2021-06-14
  • DOI :https://doi.org/10.4217/OPR.2021.43.3.179
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