The Impact of Super Typhoon Saomai (0608)on the Offshore Environment near the Yangtze Estuary
Chen Bin
Wang Kai
Liu Jian
Gao Fei
Abstract：Typhoon is an important dynamic factor for short-term changes in the marine environment,which have a huge impact on the coastal estuarine environment.Based on the filed observation offshore near Yangtze Estuary before and after the typhoon“Saomai”,the variations of water environment factors were analyzed in horizontal and vertical distribution.The results show that the temperature,salinity,chlorophyll a and turbidity changes were largely due to the advection transport and vertical mix-ing in the water body caused by the typhoon.The surface water temperature decreased and salinity increased,whereas the bot-tom water temperature increased and salinity decreased.The thickness of thermocline increased and stratifications got weaker than those before the typhoon,and the halocline almost disappeared in eastern area.The vertical transport of nutrient en-hanced,causing an increase of the chlorophyll a.After the typhoon,the bottom cold water from the Taiwan warm current rose clearly in coastal area,and the upwelling feature was more significant,and the center of the Taiwan warm current in the bottom shifted eastward.The water turbidity decreased,especially in the shallow coastal waters,fine-grained sediments were flow transported by stronger advection.
Keywords：Yangtze Estuarytyphoontemperaturesalinitychlorophyll aturbiditymarine geology
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 1402-1412 )