Internal wave damping in the East China in late summer 2014

Abstract

A field measurement was carried out to observe generation, propagation and damping of the internal waves on thecontinental shelf around 31N in the East China Sea during September 16-27, 2014. Two trawl-resistant bottommount ADCPs (M1, M2) were deployed along 126.5oE with 10 km apart.Over the 10 km distance the dominant frequency internal wave group with periods around 500 s is estimated todissipate its energy by about 30%. The damping process appears to be partly related with the higher-mode evolutionat the downward station M1, compared with the 1st-mode dominancy at the upstream station (M2). Ourobservations suggest that the damping processes of internal waves on the continental shelf of the East China Seaoccur by rather complicated manners than by the simple process due to frictional decaying.This work was partially supported by KIOST projects (PE99396)and this research has been performed as collaborativeresearch project of project No (Development of HPC-based management system againstnational scale disaster)and supported by the KOREA INSTITUTE of SCIENCE and TECHNOLOGY INFORMATION (KISTI).2) were deployed along 126.5oE with 10 km apart.Over the 10 km distance the dominant frequency internal wave group with periods around 500 s is estimated todissipate its energy by about 30%. The damping process appears to be partly related with the higher-mode evolutionat the downward station M1, compared with the 1st-mode dominancy at the upstream station (M2). Ourobservations suggest that the damping processes of internal waves on the continental shelf of the East China Seaoccur by rather complicated manners than by the simple process due to frictional decaying.This work was partially supported by KIOST projects (PE99396)and this research has been performed as collaborativeresearch project of project No (Development of HPC-based management system againstnational scale disaster)and supported by the KOREA INSTITUTE of SCIENCE and TECHNOLOGY INFORMATION (KISTI).