Observation of continental shelf wave propagating along the eastern Taiwan Strait during Typhoon Meranti 2016

作者：Junqiang SHEN,Shanwu ZHANG,Junpeng ZHANG,Mingzhang ZENG,Wendong FANG

摘要：This study is the fi rst to depict typhoon-induced continental shelf wave(CSW)propagation in the eastern Taiwan Strait(TWS)during the passage of Typhoon Meranti in 2016 using tidal gauge data and along-track satellite altimeter data.The strong amplitude response of sea level oscillations(within the range of 0.30–0.54 m)as a free,barotropic CSW after Meranti,which impacted the TWS,was clearly detected in time and frequency(in bands of 64–81 h)using wavelet and cross-wavelet analyses.The measured group and phase speeds were consistent with the dispersion curves for CSW with the fi rst-mode derived from the cross-shelf sections of the eastern TWS,with the mean speeds reaching 3 and 5.6±0.7 m/s,respectively.Coincidentally,the typhoon-induced sea level anomaly(SLA)was also captured by the satellite altimeter before this CSW entered into the TWS.Using the theoretical cross-shore CSW modes to fi t the SLA data,the results indicated that the fi rst three wave modes can interpret this CSW event appeared in the southern TWS very well,with the fi rst mode being the dominant one.

发文机构：State Key Laboratory of Tropical Oceanography Third Institute of Oceanography University of Chinese Academy of Sciences

关键词：continentalshelfwave(CSW)tidalgaugedatasatellitealtimeterdataTYPHOONTaiwanStrait

分类号： P73[天文地球—海洋科学]