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Breakpoint lead-lag analysis of the last deglacial climate change and atmospheric CO2 concentration on global and hemispheric scales
Liu, Zhi1; Huang, Shaopeng1,2; Jin, Zhangdong1,3
2018-10-10
Source PublicationQUATERNARY INTERNATIONAL
Volume490Issue:10Pages:50-59
Subtype期刊论文
AbstractAntarctic 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.
KeywordPaleoclimatic Database Trend Analysis Rampfit Breakfit Ice Age Termination
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.quaint.2018.05.021
WOS KeywordICE-AGE TERMINATIONS ; GLACIAL MAXIMUM ; SOUTHERN-OCEAN ; SEA-LEVEL ; ANTARCTIC TEMPERATURE ; FUNCTION REGRESSION ; LATE PLEISTOCENE ; CORE CHRONOLOGY ; BIPOLAR SEESAW ; CARBON-CYCLE
Indexed BySCI
Language英语
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000441524200006
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5089
Collection加速器质谱中心
Corresponding AuthorHuang, Shaopeng
Affiliation1.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
Recommended Citation
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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