年轻的旱獭
石笋
地质学
东亚季风
全新世
气候学
季风
冰期
气候突变
Allerød振荡
自然地理学
气候变化
海洋学
古生物学
全球变暖
地理
全球变暖的影响
作者
Binggui Cai,R. Lawrence Edwards,Hai Cheng,Ming Tan,Xu Wang,Tungsheng Liu
摘要
A high‐resolution stalagmite oxygen isotope record from Dongshiya Cave, located southeast of the Chinese Loess Plateau, reveals detailed climatic oscillations between 12.7 and 9.0 ka BP, on centennial and decadal timescales, with a temporal resolution of 1 to 20 years. The early Younger Dryas is characterized by a gradual increase in δ 18 O values, which is followed by a depositional hiatus for the remainder of the Younger Dryas, between 12.1 and 11.5 ka BP, implying a weak East Asian Monsoon or a dry climate during the Younger Dryas. Eight weak monsoon events between 11.5 and 9.0 ka BP punctuate the early Holocene East Asian Monsoon, and are likely tied to cold events in Greenland, including the Pre‐boreal Oscillation and the 9.2 ky Event. The spectral analysis of the Dongshiya δ 18 O time series yields peaks at frequencies that have been linked to solar frequencies, indicating that solar changes may be, at least partially, responsible for changes in the intensity of the East Asian Monsoon during the early Holocene.
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