A high-resolution climatic change since the Late Glacial Age inferred from multi-proxy of sediments in Qinghai Lake
A high-resolution climatic change since the Late Glacial Age inferred from multi-proxy of sediments in Qinghai Lake
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DOI：
10.1360/03yd0148
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
Ji Shen;Xingqi Liu;M. Ryo;Su-min Wang;Xiangdong Yang
中科院分区：
文献类型：
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作者：
Ji Shen;Xingqi Liu;M. Ryo;Su-min Wang;Xiangdong Yang
基于孢粉、碳酸盐、TOC、TN和有机质δ 13 C等多指标分析，重建了青海湖晚冰期以来高分辨率的气候演变过程。结果表明，末次盛冰期与晚冰期的分界点在18.2cal.kaBP左右。暖湿期开始于约15.4cal.kaBP，在7.4cal.kaBP达到高峰，在4.5cal.kaBP左右结束。此后，气候逐渐变得寒冷干燥。多指标分析表明，晚冰期至全新世的过渡期气候波动较大，这与北大西洋深海冰芯、格陵兰冰芯、欧洲湖泊沉积物、黄土序列和中国古里雅冰芯反映的气候波动特征相一致。晚冰期以来青海湖气候演变特征表明，东亚季风的驱动力与万年尺度上的太阳辐射有关。
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.