DOI: 10.1016/j.quascirev.2019.02.023
Scopus记录号: 2-s2.0-85062810600
论文题名: A new speleothem record of the penultimate deglacial: Insights into spatial variability and centennial-scale instabilities of East Asian monsoon
作者: Xue G. ; Cai Y. ; Ma L. ; Cheng X. ; Cheng H. ; Edwards R.L. ; Li D. ; Tan L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 210 起始页码: 113
结束页码: 124
语种: 英语
英文关键词: Coastline shift
; Oxygen isotope
; Penultimate deglaciation
; Stalagmite
; Weak monsoon interval
Scopus关键词: Atmospheric thermodynamics
; Caves
; Deterioration
; Glacial geology
; Isotopes
; Sea level
; Coastline shift
; Deglaciations
; Oxygen isotopes
; Stalagmite
; Weak monsoon interval
; Climate change
英文摘要: We present a highly resolved oxygen isotope (δ 18 O) record of the penultimate glacial-interglacial transition from a 230 Th-dated stalagmite (SD1) from the Shangxiaofeng Cave in north-eastern China. Our δ 18 O record reveals two prominent features. First, the SD1 δ 18 O record documents a brief increase of δ 18 O between 128.5 and 128.1 ka BP. Though this event has been identified in several marine records, our radiogenic dated record precisely constraints the timing and duration of the climate deterioration suggesting that this YD-like event is likely an intrinsic feature of climate change during the ice age terminations. Additionally, the δ 18 O magnitude of the glacial-interglacial change (∼0.7‰) is significantly smaller compared to the δ 18 O records from inland and relatively high elevation caves (Dongge, Sanbao and Yangkou caves) (1.4–2.4‰) but comparable to the Hulu Cave at low elevation and proximal to the shallow Bohai and Yellow seas (Kelly et al., 2006; Cheng et al., 2006; Wang et al., 2008; Cheng et al., 2009; Li et al., 2014). Assuming that the cave δ 18 O records mainly reflect precipitation isotope composition changes, the glacial-interglacial speleothem δ 18 O difference between the various Chinese caves could be related to changes in atmospheric circulations, changing effect of altitude between the various caves and climate mean states, and large-scale changes in regional land-sea coverage due to sea level changes. The latter leads to disappearance and expansion of Bohai and Yellow seas during glacial and interglacial episodes, respectively, and likely affect the amount and isotope composition of precipitation. Taken together, our study highlights that hydroclimate imprints of the East Asian Monsoon changes during the penultimate glacial-interglacial cycle were spatially heterogeneous and centennial-scale monsoonal hydroclimate instabilities are likely inherent features of deglacial climate transition. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117340
Appears in Collections: 气候变化与战略
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Recommended Citation:
Xue G.,Cai Y.,Ma L.,et al. A new speleothem record of the penultimate deglacial: Insights into spatial variability and centennial-scale instabilities of East Asian monsoon[J]. Quaternary Science Reviews,2019-01-01,210