Journal of Tropical Oceanography ›› 2022, Vol. 41 ›› Issue (4): 126-135.doi: 10.11978/2021152CSTR: 32234.14.2021152

• Marine Hydrology • Previous Articles     Next Articles

Comparative study on the contribution of various influential factors and characteristics analysis of an extra-tropical storm surge caused by cold front in the Yangshan Port and its adjacent area

XU Jie1(), GUO Jibing2(), CHEN Zhiqiang1, ZHU Zhihui1, WANG Qin1, TANG Yanling3,4   

  1. 1. Shanghai Marine Meteorological Center, Shanghai 201306, China
    2. Shanghai Fengxian Meteorological Bureau, Shanghai 201416, China
    3. Ningbo Meteorological Disaster Warning Center, Ningbo 315012, China
    4. Ningbo Meteorological Service Center, Ningbo 315012, China
  • Received:2021-11-05 Revised:2021-12-28 Online:2022-07-10 Published:2022-01-04
  • Contact: GUO Jibing E-mail:xujiewin@126.com;411898008@qq.com
  • Supported by:
    National Key Research and Development Program of China(2019YFC1510105);Science and Technology Development Foundation of Shanghai Meteorological Bureau(MS202011)

Abstract:

In this paper, an extra-tropical storm surge in the Yangshan Port (YSP) and its coastal area caused by a strong cold front on 29th December, 2020 was investigated. Meteorological observation data was analyzed to study the development of the weather system. FVCOM-SWAVE model characterized by a high-resolution unstructured-grid with 10 m was used to simulate the storm surge. The observed tide data, wave data and current data were introduced to verify the result of simulation, and the result was proved to be accurate and credible. Maximum storm surge, maximum negative storm surge, current, total water level and wave were studied to describe the character of the extra-tropical storm surge of YSP and its coastal area. Finally, sensitive experiments were carried out to compare the contributions of mean sea level pressure (SLP), wind and wave to the maximum storm surge. The main conclusions can be summarized as follows: 1) affected by the topography of the channel, the main component of the tidal current was southeast or northwest, which was approximately parallel to the shoreline, the current velocity in the deep water channel of YSP was the highest with a value between 2.6~2.8 m·s-1; 2) due to the influence of long term northerly gale and high SLP, the storm surge behave as a characteristics of short-term positive storm surge and long-term negative storm surge; 3) during the peak period of storm surge, the contribution of wind field to storm surge was ~ 90%, and the contribution of sea-level pressure field was approximately 5%; while during the peak period of negative storm surge, the contribution of sea-level pressure field was about 55%, the contribution of wind field was ~ 40%, In addition, the contribution of wave to both was less than 10%.

Key words: FVCOM-SWAVE, extra-tropical storm surge, Yangshan Port adjacent area

CLC Number: 

  • P731.23