북서태평양에서 선행 및 근접 태풍에 의한 태풍의 진로와 강도 변화 연구

Abstract

The impact of the preceding and approaching typhoon on track and intensity of typhoon in Western north pacific is studied using coupled model which consist of WRF atmosphere model and ROMS ocean model. After passage of typhoon Ewiniar(0603) in the Philippine Sea, Typhoon Bilis(0604) pass over the region which is cooled by preceding typhoon Ewiniar. The result of experiments for simulated track and intensity of typhoon Bilis using data initialized as cooling upper ocean and not cooling indicated that although difference of track is not signigicant, intensity of cooling experiment is smaller than not cooling experiment with about 20hPa, because there was less heat flux and OHC(Ocean Heat Content) in upper ocean by impact of the preceding typhoon Ewiniar. Typhoon Kompasu(1007) pass over the vicinity of region where typhoon Lionrock(1006) interacted with typhoon Namtheun(1008). The result of experiments for simulated track and intensity of typhoon Kompasu as initial condition including bogussing effect to approaching typhoon and not including suggest that although difference of intensity is not signigicant, track difference between bogussing and not bogussing experiment is quite large with discrepancy of about 500km at the maximum, because approaching typhoon Namtheun impacted by bogussing effect relatively moved upward, changing edge of North Pacific High through 500hPa streamlines.