Comparison of two typhoon-induced storm surges at the Zhanjiang Coast

4th International Conference on Geological, Geographical, Aerospace and Earth Science 2016

Zhao, Xue^1 ; Xie, Qiang^2 ; Hong, Bo^3 ; Xu, Hongzhou^2 ; Chen, Lingfang^2 ; Hu, Jinlei^1 ; Zhang, Min^1 ; Huang, Baoxia^1 ; Che, Zhiwei^4

South China Sea Forecast Center, State Oceanic Administration, Guangzhou, Guangdong

510310, China^1

Iinstitute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, Hainan

572000, China^2

School of Civil and Transportation Engineering, South China University of Technology, Guangzhou, Guangdong

510641, China^3

Haikou Marine Environment Monitoring Center Station, State Oceanic Administration, Haikou, Hainan

570311, China^4

关键词: Air pressures;    Astronomic tides;    Complex dynamics;    Moving speed;    Northern South China Sea;    Storm surges;    Typhoon intensities;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/38/1/012003/pdf
DOI  :  10.1088/1755-1315/38/1/012003

来源: IOP

【 摘 要 】

Typhoon-induced storm surge is the largest threat to the Zhanjiang Coast of the northern South China Sea. In this study, we report on two processes of storm surges generated by Typhoons Rammasun (TR) and Kalmaegi (TK) with similar tracks at this region. Results show that the peak of the storm surge during TK (with a maximum value of 4.50 m) was significantly larger than that during TR (with the maximum value of 2.60 m), although the intensity of TK (Category 4 with 40 m s-1maximum wind and 960 hPa central air pressure) was much weaker than that of TR (Category 6 with 60 m s-1maximum wind and 910 hPa central air pressure). Comparisons of the typhoon properties and astronomic tides reveal that the peaks of storm surge were closely related to typhoon maximum wind radius, typhoon moving speed, and tide-surge interaction rather than typhoon intensity during the two cases, indicating complex dynamics of storm surge at the Zhanjiang Coast.