A high-resolution climatic change since the Late Glacial Age inferred from multi-proxy of sediments

• 作 者: SHEN Ji LIU Xingqi Ryo Matsumo
• 机 构: Nanjing Institute of Geography and Limnology,Geology Institute
• 出 处: 中国科学D辑（英文版）
• 发表日期: 2004年期
• 关键词: Qinghai Lake Late-Glacial Age to Holocene multi-proxy analysis high-resolution p

Based on multi-proxy analysis of pollen, carbonate, TOC, TN and δ13C of organic matters, a high-resolution climatic evolution of Qinghai Lake since the Late Glacial Age is reconstructed. The results indicate that the boundary between the Last Glacial Maximum and the Late Glacial Age is at about 18.2 cal.ka BP. The warm and wet period, which began at about 15.4 cal.ka BP, culminated at 7.4 cal.ka BP and came to its end at about 4.5 cal.ka BP. After that, the climate gradually became cold and dry. The multi-proxy analysis indicates that the climate fluctuated greatly during the transitional period from the Late glacial Age to the Holocene, and this is in good accordance with that reflected by deep sea cores of North Atlantic, ice cores of Greenland, lake sediments in Europe, loess sequences and Guliya ice core in China. The climatic evolutional characteristic of the Qinghai Lake since the Late Glacial Age shows that the driving force of the East-Asia Monsoon correlates with solar radiation on the ten-thousand-year scale.