Abstract:

Based on some data collected in the Sixth Southern Ocean Expedition of China during the year of 1989/1990. The relationship between the distribution of nutrients and productivity in the Prydz Bay has been discussed. The results show that outside the Emery ice shelf exists a large expand of warm and high nutrient content in the euphotic zone is relatively lower,the dissolved oxygen is up to 120% and the content of chlorophyll a is more than 1 00mg/m 3. All these show that Prydz Bay is a high productivity area in the Antarctica. The vertical distribution of chemical elements emerges a strong spring layer like temperature and abnormal vertical distribution of nutrient turns up at 350m layer. However,there is not almost obvious spring layer in salinity. Finally,the various factors causing abnormal distribution are discussed.