The biogeochemistry of carbon cycle in summer of the Prydz Bay, Antarctic Ⅰ:Characteristics of DOC distribution

The distributions and changes of dissolved organic carbon in the Prydz Bay and out open sea were investigated during CHINARE-15 (the 15th Chinese National Antarctic Research Expedition). The results showed that the content of DOC was higher in the Prydz Bay and outer open sea compared to those typical of surface oceanic levels (70- 80 μM), average content of DOC in the surface water was 102.32 μM, the range was 68.23- 125.92 μM. The vertical distribution of DOC in the water column was similar to many ocean sites, that is to say, the content of upper water is higher than deep water, a subsurface maximum persisted between 25- 50 m. The DOC pool in the Prydz Bay were consisted with labile, semi-labile and refractory pools, in which refractory pools was mainly part. The concentration of refractory DOC was 92.34 and 76.89 μM in Prydz Bay and outer open sea, and account 77% and 82% for total DOC, respectively.

The distribution and standing crops of Antarctic krill in the Prydz Bay region during the austral summer of 1991/1992 and 1992/1993

The horizontal and vertical distributions of Antarctic krill in the Prydz Bay region were investigated in 1991/1992 and 1992/1993. The result showed that the high density distribution area of Antarctic krill was within the area of 63°～67°S 、68°E and the waters of above 70 m deep. The standing crops of Antarctic kill was 1.699×10 6 t within the surveyed area of 150533.9 km 2 in 1991/1992 and 4.043×10 6 t within the surveyed area of 125740.7 km 2 in 1992/1993.

夏季南极普里兹湾碳的生物地球化学循环Ⅰ:DOC的含量与分布

本文通过南极第 1 5次科学考察 ,对夏季普里兹湾的溶解有机碳 (DOC)进行研究。结果表明 :调查期间普里兹湾及邻近海域DOC平均含量较高 ,表层含量在 68.2 3— 1 2 5 .92 μM之间变化 ,平均值为 1 0 2 .32 μM ,大于典型的大洋表层DOC含量 ( 70— 80 μM )。垂直分布表明水体上层DOC含量高于底层 ,在 2 5— 5 0m附近含量出现最高值。在普里兹湾及邻近海域难降解有机物是DOC的主要部分 ,经估算湾内难降解DOC含量 92 .34μM占总DOC的 77% ,湾外难降解DOC含量为 76.89μM ,占总DOC的 82 %。