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Typhoon Damrey 2012 has been the strongest typhoon to strike the area north of the Yangtze River since 1949. Two cruise observations to examine the shallow water response to typhoon were carried out just before and after the passage of Damrey in the shallow water near the Jiaozhou Bay on 1 and 5 August 2012. The observation results indicate that, after the passage of Damrey, the thermocline was deepened and weakened significantly. The water temperature below the surface increased by about 4–10 °C. A significant temperature gradient was generated at the bottom of the water column. The salinity decreased throughout the water column. The surface heat flux and precipitation data indicate that the temperature increase and salinity decrease of the bottom water were mainly caused by the intrusion of warm, low-salinity water from the surface (depth < 7 m). The model results suggest that the mechanism that drive the variations as follows: the warm low-salinity surface water was driven by wind and flowed onshore, accumulated and sank as it encountered the coast, which forced the cold bottom water of the Yellow Sea Cold Water Mass (YSCWM) to flow offshore. [ABSTRACT FROM AUTHOR]

Abstract: Multidisciplinary oceanographic investigations were carried out in the southern Yellow Sea (YS) from December 2006 to February 2007. The ship-based investigations provided spatial distributions of temperature, salinity, and zooplankton. The horizontal distributions of temperature and salinity indicate the location of the Yellow Sea Warm Current (YSWC), and the net-sampling results display low biomass of zooplankton in the YSWC area. The mooring observations show the temporal variability of the current, bottom temperature, and volume backscattering strength (Sv) at the mooring sites. The current and bottom temperature records illustrate the process of the arrival of the warm water advected by the YSWC. The time series of Sv measured with acoustic Doppler current profilers (ADCPs) indicate a distinct change in the diel vertical migration (DVM) pattern of the zooplankton. This change is associated with the arrival of the warm water. Our investigation suggests that the transport of low-biomass water by the YSWC causes the zooplankton biomass in the study area to decrease. The YSWC also causes the DVM to change due to enhanced vertical mixing. [Copyright &y& Elsevier]