DOI: 10.1016/j.quascirev.2018.05.005
Scopus记录号: 2-s2.0-85047268186
论文题名: Beyond the bipolar seesaw: Toward a process understanding of interhemispheric coupling
作者: Pedro J.B. ; Jochum M. ; Buizert C. ; He F. ; Barker S. ; Rasmussen S.O.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 192 起始页码: 27
结束页码: 46
语种: 英语
英文关键词: Antarctic Circumpolar Current
; Antarctic Isotope Maximum
; Atlantic Meridional Overturning Circulation
; Bipolar ocean seesaw
; Dansgaard–oeschger event
; Millennial-scale climate variability
; Sea ice
; Southern Ocean
Scopus关键词: Budget control
; Heat transfer
; Isotopes
; Ocean currents
; Sea ice
; Antarctic Circumpolar Currents
; Antarctic isotope maximum
; Atlantic meridional overturning circulations
; Bipolar ocean seesaw
; Climate variability
; Southern ocean
; Atmospheric movements
; Antarctic Circumpolar Wave
; climate forcing
; climate variation
; Dansgaard-Oeschger cycle
; heat transfer
; isotopic analysis
; meridional circulation
; moisture transfer
; sea ice
; thermodynamics
; warming
; Atlantic Ocean
; Pacific Ocean
; Southern Ocean
英文摘要: The thermal bipolar ocean seesaw hypothesis was advanced by Stocker and Johnsen (2003) as the 'simplest possible thermodynamic model’ to explain the time relationship between Dansgaard–Oeschger (DO) and Antarctic Isotope Maxima (AIM) events. In this review we combine palaeoclimate observations, theory and general circulation model experiments to advance from the conceptual model toward a process understanding of interhemispheric coupling and the forcing of AIM events. We present four main results: (1) Changes in Atlantic heat transport invoked by the thermal seesaw are partially compensated by opposing changes in heat transport by the global atmosphere and Pacific Ocean. This compensation is an integral part of interhemispheric coupling, with a major influence on the global pattern of climate anomalies. (2) We support the role of a heat reservoir in interhemispheric coupling but argue that its location is the global interior ocean to the north of the Antarctic Circumpolar Current (ACC), not the commonly assumed Southern Ocean. (3) Energy budget analysis indicates that the process driving Antarctic warming during AIM events is an increase in poleward atmospheric heat and moisture transport following sea ice retreat and surface warming over the Southern Ocean. (4) The Antarctic sea ice retreat is itself driven by eddy-heat fluxes across the ACC, amplified by sea-ice–albedo feedbacks. The lag of Antarctic warming after AMOC collapse reflects the time required for heat to accumulate in the ocean interior north of the ACC (predominantly the upper 1500 m), before it can be mixed across this dynamic barrier by eddies. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112143
Appears in Collections: 气候减缓与适应
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作者单位: Center for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Center for Climatic Research, Nelson Institute for Environmental Studies, University of Wisconsin-Madison, Madison, WI, United States; School of Earth and Ocean Sciences, Cardiff University, Cardiff, United Kingdom
Recommended Citation:
Pedro J.B.,Jochum M.,Buizert C.,et al. Beyond the bipolar seesaw: Toward a process understanding of interhemispheric coupling[J]. Quaternary Science Reviews,2018-01-01,192