final_program_abstracts[1]

11 IMSC Session Program
Statistical and dynamical impacts of the tropical cyclones on
the summertime submonthly wave patterns over the Western
North Pacific
Wednesday - Poster Session 5
Ken-Chung Ko 1 and Huang-Hsiung Hsu 2
1
Department of Geography, National Kaohsiung Normal University, Kaohsiung,
Taiwan
2
Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan
The importance of the impacts of the tropical cyclones (TCs) on the sub-monthly
wave pattern near East Asia-Pacific area during July-September season was
examined. Those TCs were removed from the large scale circulation and the resultant
circulation features were compared with the original circulation patterns. The 7-30
day filtered wave pattern was also examined and compared with those no-TC patterns.
The results indicate that the kinetic energy was significantly reduced after the TCs
were removed. The barotropic conversion term also shows significant changes
between the TC and no-TC fields as well as the extreme intraseasonal phases. It was
believed that the TCs could have an impact on the circulation fields not only in the
strength but also in the wave patterns.
Abstracts 206