DOI: 10.1002/2014GL060321
论文题名: Instability of the Atlantic overturning circulation during Marine Isotope Stage
作者: Zhang X. ; Prange M. ; Merkel U. ; Schulz M.
刊名: Geophysical Research Letters
ISSN: 0094-10536
EISSN: 1944-10267
出版年: 2014
卷: 41, 期: 12 起始页码: 4285
结束页码: 4293
语种: 英语
Scopus关键词: Marine isotope stages
; Overturning circulation
; climate modeling
; Dansgaard-Oeschger cycle
; global climate
; North Atlantic Oscillation
; overturn
; Arctic
; Greenland
英文摘要: Variations in the strength of the Atlantic meridional overturning circulation (AMOC) were involved in the occurrences of Dansgaard-Oeschger (D-O) events during Marine Isotope Stage 3 (MIS3). The stability of the AMOC to North Atlantic freshwater perturbations is studied using a comprehensive climatemodel under MIS3 boundary conditions. An AMOC stability diagram constructed from a series of equilibrium freshwater perturbation experiments reveals a highly nonlinear dependence of AMOC strength on freshwater forcing. The MIS3 baseline state is remarkably unstable with respect to minor perturbations. The global climate signal associated with a change in AMOC strength is consistent with a transition from an interstadial to a stadial state including an annual mean surface air temperature drop of ∼8 K in central Greenland. We suggest that minor freshwater perturbations in the hydrologic cycle, e.g., related to ice sheet processes, had the potential to trigger D-O-type climate shifts associated with a threshold in the atmosphere-ocean system. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907947805&doi=10.1002%2f2014GL060321&partnerID=40&md5=dcd0d0457c12584c5721399c97b508d2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7800
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Geosciences, Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
Recommended Citation:
Zhang X.,Prange M.,Merkel U.,et al. Instability of the Atlantic overturning circulation during Marine Isotope Stage[J]. Geophysical Research Letters,2014-01-01,41(12).