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Transient temperature asymmetry between hemispheres in the Palaeogene Atlantic Ocean
Liu, Zhonghui1,2; He, Yuxin3; Jiang, Yiqing1; Wang, Huanye2; Liu, Weiguo2; Bohaty, Steven M.4; Wilson, Paul A.4
2018-09-01
Source PublicationNATURE GEOSCIENCE
Volume11Issue:9Pages:656-+
SubtypeArticle
AbstractDuring the Late Palaeogene between similar to 40 and 23 million years ago (Ma), Earth transitioned from a warm non-glaciated climate state and developed large dynamic ice sheets on Antarctica. This transition is largely inferred from the deep-sea oxygen isotope record because records from independent temperature proxies are sparse. Here we present a 25-million-year-long alkenone-based record of surface temperature change from the North Atlantic Ocean. Our long temperature record documents peak warmth (similar to 29 degrees C) during the middle Eocene, a slow overall decline to the Eocene/Oligocene transition (EOT, similar to 34 Ma) and high-amplitude variability (between similar to 28 and 24 degrees C) during the Oligo-Miocene. The overall structure of the record is similar to that of the deep-sea record, but a distinct anomaly is also evident. We find no evidence of surface cooling in the North Atlantic directly coinciding with the EOT when Antarctica first became cold enough to sustain large ice sheets and subantarctic waters cooled substantially. Surface ocean cooling during the EOT was therefore strongly asymmetric between hemispheres. This transient thermal decoupling of the North Atlantic Ocean from the southern high latitudes suggests that Antarctic glaciation triggered changes in ocean circulation-driven heat transport and influenced the far-field climate response.
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1038/s41561-018-0182-9
WOS KeywordEOCENE-OLIGOCENE TRANSITION ; MERIDIONAL OVERTURNING CIRCULATION ; ANTARCTIC GLACIATION ; THERMOHALINE CIRCULATION ; CLIMATE TRANSITION ; ATMOSPHERIC CO2 ; SOUTH ATLANTIC ; PACIFIC-OCEAN ; DRAKE PASSAGE ; ICE SHEETS
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000443302900012
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5337
Collection加速器质谱中心
Affiliation1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China
3.Zhejiang Univ, Sch Earth Sci, Hangzhou, Zhejiang, Peoples R China
4.Univ Southampton, Nat Oceanog Ctr Southampton, Southampton, Hants, England
Recommended Citation
GB/T 7714
Liu, Zhonghui,He, Yuxin,Jiang, Yiqing,et al. Transient temperature asymmetry between hemispheres in the Palaeogene Atlantic Ocean[J]. NATURE GEOSCIENCE,2018,11(9):656-+.
APA Liu, Zhonghui.,He, Yuxin.,Jiang, Yiqing.,Wang, Huanye.,Liu, Weiguo.,...&Wilson, Paul A..(2018).Transient temperature asymmetry between hemispheres in the Palaeogene Atlantic Ocean.NATURE GEOSCIENCE,11(9),656-+.
MLA Liu, Zhonghui,et al."Transient temperature asymmetry between hemispheres in the Palaeogene Atlantic Ocean".NATURE GEOSCIENCE 11.9(2018):656-+.
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