Long-term trend and abrupt events of the Holocene Asian monsoon inferred from a stalagmite δ10O record from Shennongjia in Central China
作者： Xiaohua Shao , Yongjin Wang , Hai Cheng , Xinggong Kong , Jiangying Wu
DOI: 10.1007/S11434-005-0882-6
关键词:
摘要: A high-resolution oxygen-isotope record from a thorium-uranium-dated stalagmite Shanbao Cave at Shennongjia reflects variations in the amount of monsoon precipitation for period 11.5 to 2.1 ka (1 = 1000 cal aBP). Between and 9.3 ka, sharp decrease δ18O indicates rapid increase precipitation. An interval generally high is observed between 4.4 ka. arid has prevailed The long-term trend appears follow summer insolation 33°N latitude. abrupt around 4.3 synchronous with collapse Neolithic culture central China. This change could have resulted amplification gradually decreased by positive vegetation-atmosphere-aerosol feedback. weakened Asian events were concert Greenland temperature during early Holocene, centered 8.2, 8.6, 9.3, 10.2 11.0 correlation suggests that changes low-latitude are connected climate high-latitude polar region.
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