Breakpoint lead-lag analysis of the last deglacial climate change and atmospheric CO2 concentration on global and hemispheric scales

doi:10.1016/j.quaint.2018.05.021

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	Breakpoint lead-lag analysis of the last deglacial climate change and atmospheric CO2 concentration on global and hemispheric scales
	Liu, Zhi 1; Huang, Shaopeng 1,2; Jin, Zhangdong 1,3
	2018-10-10
发表期刊	QUATERNARY INTERNATIONAL
卷号	490 期号:10 页码:50-59
文章类型	期刊论文
摘要	Antarctic ice core records show that climate change and atmospheric CO2 concentration (aCO(2)) are closely related over the past 800 thousand years. However, the interpretation of their sequential, and hence the causal relationship has long been controversial. In this study, we revisit this long-standing scientific issue based on 88 well-dated high-resolution climate proxy records derived from ice cores, marine deposits, and stalagmites. We composite global and hemispheric stacks of the last deglacial climate index (DCI) using a normalization scheme instead of a more conventional area-weighting and mixing scheme to enable a better detection of temporal variations. Rampfit and Breakfit techniques are employed to detect the trend transitions in each composited DCI series and in the recently constructed centennial-scale aCO(2) over the period from 22 to 9 thousand years before present. We detect a clear lead of DCI change over aCO(2) variation on both global and hemispheric scales at the early stage of the deglaciation, suggesting that the variation of aCO(2) is an internal feedback in Earth's climate system rather than an initial trigger of the last deglacial warming. During the periods of the Bolling-Allerod and the Younger Dryas, the climate system appeared to have been constrained by a fast coupling mechanism between climate change and aCO(2) with no obvious asynchrony. The northern and southern hemispheric DCI stacks exhibit a seesawing pattern that can be linked to the influences of Atlantic meridional overturning circulation (AMOC) strength, revealing an important role of AMOC in regulating the global climate in the course of the last deglaciation.
关键词	Paleoclimatic Database Trend Analysis Rampfit Breakfit Ice Age Termination
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1016/j.quaint.2018.05.021
关键词[WOS]	ICE-AGE TERMINATIONS ; GLACIAL MAXIMUM ; SOUTHERN-OCEAN ; SEA-LEVEL ; ANTARCTIC TEMPERATURE ; FUNCTION REGRESSION ; LATE PLEISTOCENE ; CORE CHRONOLOGY ; BIPOLAR SEESAW ; CARBON-CYCLE
收录类别	SCI
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000441524200006
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/5089
专题	加速器质谱中心
通讯作者	Huang, Shaopeng
作者单位	1.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China 2.Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Liu, Zhi,Huang, Shaopeng,Jin, Zhangdong. Breakpoint lead-lag analysis of the last deglacial climate change and atmospheric CO2 concentration on global and hemispheric scales[J]. QUATERNARY INTERNATIONAL,2018,490(10):50-59.
APA	Liu, Zhi,Huang, Shaopeng,&Jin, Zhangdong.(2018).Breakpoint lead-lag analysis of the last deglacial climate change and atmospheric CO2 concentration on global and hemispheric scales.QUATERNARY INTERNATIONAL,490(10),50-59.
MLA	Liu, Zhi,et al."Breakpoint lead-lag analysis of the last deglacial climate change and atmospheric CO2 concentration on global and hemispheric scales".QUATERNARY INTERNATIONAL 490.10(2018):50-59.

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