Abstract:

The sedimentation rate of Lake Nella near Zhongshan Station,east Antarctica,is deduced according to the ice sheet retreatment rate of this area and the temporal variation of sulfur concentration in the sediment of Lake Nella. The 4000year variation of sulfur,index for biological activity,in sediments of Xihu Lake,west Antarctica and Lake Nella,east Antarctica is compared with that of CH3SO-3,index for marine biological activity,in D10 ice core. The results show that the three curves are very similar in their trend,demonstrating the global change in the recent 4000 years. The most favorable period was between 1850a B.P. and 1150 a B.P..