DOI: 10.5194/cp-8-2031-2012
Scopus记录号: 2-s2.0-84870976948
论文题名: Terminations VI and VIII (∼ 530 and ∼ 720 kyr BP) tell us the importance of obliquity and precession in the triggering of deglaciations
作者: Parrenin F. ; Paillard D.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2012
卷: 8, 期: 6 起始页码: 2031
结束页码: 2037
语种: 英语
Scopus关键词: climate variation
; deglaciation
; glaciation
; ice
; numerical model
; paleoclimate
; volume
英文摘要: The main variations of ice volume of the last million years can be explained from orbital parameters by assuming climate oscillates between two states: glaciations and deglaciations (Parrenin and Paillard, 2003; Imbrie et al., 2011) (or terminations). An additional combination of ice volume and orbital parameters seems to form the trigger of a deglaciation, while only orbital parameters seem to play a role in the triggering of glaciations. Here we present an optimized conceptual model which realistically reproduce ice volume variations during the past million years and in particular the timing of the 11 canonical terminations. We show that our model looses sensitivity to initial conditions only after ∼200 kyr at maximum: the ice volume observations form a strong attractor. Both obliquity and precession seem necessary to reproduce all 11 terminations and both seem to play approximately the same role. More precisely, obliquity plays a fundamental role in the triggering of termination VI (∼530 kyr BP), while precession plays a fundamental role in the triggering of termination VIII (∼720 kyr ago). © Author(s) 2012. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49497
Appears in Collections: 气候变化与战略
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Recommended Citation:
Parrenin F.,Paillard D.. Terminations VI and VIII (∼ 530 and ∼ 720 kyr BP) tell us the importance of obliquity and precession in the triggering of deglaciations[J]. Climate of the Past,2012-01-01,8(6)