Characters of the Organic δ¹³C and Its Climatic Information in Sediment Cores of the Lakes Nearby the Arcitic Yellow River Station of China

Arctic is favored by researchers due to its sensitivity and feedback to Global Climate Change, and the organic δ¹³C record of lake sediment is a key indicator for the environmental climate change. The sedimentary rates and δ¹³C of two sediment cores (No.1 and No.2), collected from two lakes near the Arctic Yellow River Station of China during July to Aug of 2007, were determined in order to investigate the climate change of the Arctic during the past centuries. The sedimentary rates, determined with ²¹⁰Pb method, of sample No.1 and sample No.2 were 1.05 mm/a and 0.91 mm/a, respectively, and the vertical distribution of organic δ¹³C of two sediment cores have similar trends during the same period. The results show that the temperature at the Arctic Yellow River Station of China during the last three centuries was unsteady, and was alternating with a “lower-higher-lower” process.