DISTRIBUTIONS OF NUTRIENTS IN THE SOUTHERN YELLOW SEA AND EAST CHINA SEA IN SPRING AND SUMMER 2011

The horizontal and vertical distributions of nutritional salts were studied on the basis of data obtained by field observations from January to April and August,2011 in Southern Yellow Sea and East China Sea.The concentrations of silicate and nitrate were higher and the concentrations of phosphate and ammonia were lower in spring than in summer.The high concentrations of nutrients in the surface water occurred mainly in the Changjiang diluted water area and the coastal water area of Zhejiang and Fujian.The distribution of high concentrations of nutrients was influenced by Changjiang diluted water,and covered broader areas in summer.The main factor affecting the distribution of nutrients in the open sea was Kuroshio water.The contents of nutrients in the middle area of the Yellow Sea were high due to strong and stabilizing thermocline in summer.