북서태평양 지역기후접합모형: 현재기후 모사 분석

Abstract

This study presents a regional coupled climate model (RCCM) for the western North Pacific, composed of the Regional Ocean Modeling System (ROMS) as the ocean component and by the Weather Research Forecast (WRF) as the atmospheric component through the Model Coupling Toolkit (MCT). The model is applied to a western North Pacific oceanic domain with a horizontal resolution of 1/12˚ and an East Asia region for the atmospheric domain with a horizontal resolution of 50km. For the assessment of the present climate simulation, we compared the RCCM simulations with observational data and reanalysis data. The ocean model of the RCCM system is able to capture the inter-annual variability of seasonal SST and the fine scale spatial-temporal evolution of observed SST anomalies, although model shows a little climate drift due to long-term integration. It shows that the volume transports of Korea Strait, Tsugaru Strait, and Soya Strait simulated in the ocean model are similar to those in observational data. In addition, North Pacific Intermediate Water is found along about 165°E and the meandering of the Kuroshio Current and the East Korean Warm Current appeared along about 35°N and 38°N, respectively. Except that the simulated winter mixed layer depth (MLD) is deeper than observed in the Kuroshio extension, the climatological monthly mean spatial distribution of simulated MLD is comparable to the Montegut el al. (2004) climathrough the Model Coupling Toolkit (MCT). The model is applied to a western North Pacific oceanic domain with a horizontal resolution of 1/12˚ and an East Asia region for the atmospheric domain with a horizontal resolution of 50km. For the assessment of the present climate simulation, we compared the RCCM simulations with observational data and reanalysis data. The ocean model of the RCCM system is able to capture the inter-annual variability of seasonal SST and the fine scale spatial-temporal evolution of observed SST anomalies, although model shows a little climate drift due to long-term integration. It shows that the volume transports of Korea Strait, Tsugaru Strait, and Soya Strait simulated in the ocean model are similar to those in observational data. In addition, North Pacific Intermediate Water is found along about 165°E and the meandering of the Kuroshio Current and the East Korean Warm Current appeared along about 35°N and 38°N, respectively. Except that the simulated winter mixed layer depth (MLD) is deeper than observed in the Kuroshio extension, the climatological monthly mean spatial distribution of simulated MLD is comparable to the Montegut el al. (2004) clima