Abstract:

The investigation on sea-ice research was carried out in North-Western Weddell Sea,Antarctica,during the cruise of ANT/XⅢ-7 on board POLARSETEN in austral winter (Aug—Oct) of 2006. Biogeochemical parameters of Chlorophyll a,POC and C/N from sea ice cores were measured. The results indicated that the gross value of Chlorophyll a ranged from 14.7μg·l-1to 1519.2μg·l-1 with the mean of 233.8μg·l-1,and it was up to 100μg·l-1 by 57% ice cores. The concentrations of chlorophyll a ranged from 2.1μg·l-1 to 84.4μg·l-1 with the mean of 16.6 μg·l-1 per core,which was 2.2 times higher than that in the beginning of winter and 7.5 times higher than that in mid-winter in Weddell Sea. The mean value of R (chlorophyll a / gross of chlorophyll) was 83%. It indicates that stronger activation of ice algae cells are significant primary production in Antarctic sea ice in the winter. Also ice algae could lend great support to spring bloom of phytoplankton in waters. Therefore,it would largely contribute to the growth of marine larvae of zooplankton,and promote sustainable development of marine ecosystem in the Southern Ocean as well.