동해에서 해양순환이 M2 내부조석에 미치는 영향

Abstract

The M2 internal tide in the East/Japan Sea is investigated using a high resolution numericalmodel (RIAM Ocean Model) which has been used for the real-time ocean forecastingsystem of the East/Japan Sea at RIAM. The model assimilates satellite-measured sea surfacetemperature and height every day, which produces realistic background fields of oceaniccurrent and stratification. It includes tidal forcing estimated from NAO.99Jb regional oceantide model along open boundaries. The study period is from September 2008 to August 2009.Surface tides reproduced in the model agree well with in-situ measurements from coastal tidalgauge, satellite altimetry, shipboard ADCP across the Korea/Tsushima Straits, HF radar, andcurrent moorings in the Ulleung Basin. Annual average of the first-mode M2 internal tidalenergy computed using numerical model outputs is consistent with previous observation in theUlleung Basin. Monthly-mean patterns of M2 internal tide distribution reveal close relationshipwith changes of background current and stratification fields. We present the impact ofbackground fields on the energy transfer from barotropic to several modes of baroclinic M2tide in the East/Japan Sea.llite-measured sea surfacetemperature and height every day, which produces realistic background fields of oceaniccurrent and stratification. It includes tidal forcing estimated from NAO.99Jb regional oceantide model along open boundaries. The study period is from September 2008 to August 2009.Surface tides reproduced in the model agree well with in-situ measurements from coastal tidalgauge, satellite altimetry, shipboard ADCP across the Korea/Tsushima Straits, HF radar, andcurrent moorings in the Ulleung Basin. Annual average of the first-mode M2 internal tidalenergy computed using numerical model outputs is consistent with previous observation in theUlleung Basin. Monthly-mean patterns of M2 internal tide distribution reveal close relationshipwith chan