DOI: 10.1002/2014GL061413
论文题名: Dansgaard-Oeschger oscillations predicted in a comprehensive model of glacial climate: A "kicked" salt oscillator in the Atlantic
作者: Peltier W.R. ; Vettoretti G.
刊名: Geophysical Research Letters
ISSN: 0094-9687
EISSN: 1944-9418
出版年: 2014
卷: 41, 期: 20 起始页码: 7306
结束页码: 7313
语种: 英语
英文关键词: Dansgaard-Oeschger
; glacial
; modeling
; paleoclimate
Scopus关键词: Atmospheric temperature
; Climate models
; Glacial geology
; Models
; Nonlinear feedback
; Comprehensive model
; Dansgaard-Oeschger
; glacial
; Greenland ice cores
; Nonlinear oscillation
; North Atlantic Deep Water
; Paleoclimates
; Surface air temperatures
; Relaxation oscillators
; air temperature
; Dansgaard-Oeschger cycle
; glacial environment
; ice core
; nonlinearity
; numerical model
; oxygen isotope
; paleoclimate
; prediction
; Arctic
; Atlantic Ocean
; Greenland
; Greenland Ice Sheet
英文摘要: During the period from 60,000 to 35,000-years ago, Summit-Greenland ice core records of the oxygen isotopic ratio 18O/16O exhibit intense millennium time scale oscillations. These Dansgaard-Oeschger oscillations have been interpreted to represent the variations in North Atlantic air temperature caused by correlative changes in the strength of North Atlantic Deep Water production. We apply a comprehensive model of glacial climate to unambiguously identify the mechanism responsible for this phenomenon. This is shown to involve a salt oscillation of relaxation oscillator form. This nonlinear oscillation does not require the existence of feedback due to freshwater release from grounded ice on the continents during the warm phase of the cycle. Key Points The Dansgaard-Oeschger oscillation is explained using a coupled modelMechanism involves a salt oscillator of relaxation oscillator formThe bipolar seesaw in surface air temperature is accurately predicted ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911438132&doi=10.1002%2f2014GL061413&partnerID=40&md5=ab21fa0361899237ff1b85fe23021f49
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6951
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, University of Toronto, Toronto, ON, Canada
Recommended Citation:
Peltier W.R.,Vettoretti G.. Dansgaard-Oeschger oscillations predicted in a comprehensive model of glacial climate: A "kicked" salt oscillator in the Atlantic[J]. Geophysical Research Letters,2014-01-01,41(20).