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IUGG XXIV General Assembly July 2-13, 2007 Perugia, Italy<br />

(S) - <strong>IASPEI</strong> - International Association of Seismology and Physics of the Earth's<br />

Interior<br />

JSS003 Poster presentation 1884<br />

Storm surges/Wave Operational Ocean Model in KMA<br />

Dr. Sung Hyup You<br />

Marine Meteorology & Earthquake Research Lab. METRIKMA<br />

Sangwook Park, Jang-Won Seo<br />

The Korea Meteorological Administration (KMA) has operated numerical ocean wave prediction system<br />

since 1992. Prior June 1999, the 1st generation wave model (DSA-5) was operated twice in daily over<br />

the Northeast Asia region. With introduction of NEC SX5 supercomputer in 1999, the 3rd generation<br />

wave model (WAM) was implemented with two wave prediction systems the ReWAM (Regional WAve<br />

Model) and the GoWAM (Global WAve Model). At present, KMA (Korea Meteorological Administration)<br />

has operated the wave model and storm surge model based on CRAY X1E system. The study shows<br />

development and verification of operational ocean model and future plan of KMA. The operational storm<br />

surge model (STOM : Storm surge/Tide Operational Model) area covers 115-150E, 20-52N based on<br />

POM (Princeton Ocean Model) (Blumberg and Mellor, 1987) with 1/12 horizontal resolutions including<br />

the Yellow Sea, East China Sea and the East Sea, marginal seas around Korea. From July, 2006 the<br />

STOM have been applied to formal forecasting model in KMA. Sea surface wind and pressure from the<br />

Regional Data Assimilation and Prediction System (RDAPS) is used for forcing input of storm surge<br />

model. In this model, the level of storm surge calculated by the difference between tide level and sea<br />

level change caused by meteorological effects. The newly developed operational wave model is<br />

WAVEWATCH III which is a third generation wave model developed by Tolman (1989). The Regional<br />

WAVEWATCH III (RWW3) covers the northwestern Pacific Ocean from 115E to 150E and from<br />

20N to 50N similar to STOM. The horizontal grid intervals are 1/12 in both latitudinal and<br />

longitudinal directions. The RWW3 is integrated from a state of rest and forced by the RDAPS wind<br />

stress produced by KMA. From 2007, the RWW3 will be applied to formal forecasting model in KMA. The<br />

Coastal WAVEWATCH III (CWW3) covers 6 coastal areas around Korea peninsular. The horizontal grid<br />

intervals are 1/120 for each area. Under the renewal process of power computing packs at KMA on<br />

the year 2005, the CRAY X1E system (14.5 Teraflops) replaced NEC SX5 (224 Gigaflops). Establishing of<br />

newly devised ocean prediction system is underway in conjunction with high computing environment.<br />

The main focus of new wave system lies in accommodating coastal wave/surge processes. The west<br />

and the south coastal area of Korean peninsular is one of the challenging places in ocean modeling for<br />

reasonable prediction of nearshore wave conditions and tides.<br />

Keywords: stormsurges, wave, operationaloceanmodel

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