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

• Published in: Science China. Earth sciences Vol. 48; no. 6; pp. 742 - 751
• Main Authors: Shen, Ji, Liu, Xingqi, Ryo, Matsumoto, Wang, Sumin, Yang, Xiangdong
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01.06.2005; Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China%Geology Institute, Tokyo University, Tokyo 113, Japan
• Subjects: Age; Auroral kilometric radiation; Carbonates; Climate change; Climatic analysis; Climatic evolution; Cores; Deep sea; Freshwater; Glacial lakes; Glacial periods; High resolution; Holocene; Ice cores; Inland waters; Lake deposits; Lake ice; Lake sediments; Lakes; Last Glacial Maximum; Loess; Marine; Palaeo studies; Pollen; Resolution; Sediment; Sediments; Solar radiation; Total organic carbon; Qinghai Lake; AN, North Atlantic; ANE, Europe; China, People's Rep; China, People's Rep. Qinghai Prov., Qinghai L; AN, Greenland; multi-proxy analysis; Late-Glacial Age to Holocene; Qinghai Lake; high-resolution; palaeoclimate
• ISSN: 1006-9313; 1674-7313; 1862-2801; 1869-1897
• DOI: 10.1360/03yd0148

Based on multi-proxy analysis of pollen, carbonate, TOC, TN and δ 13C 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.