| DOI: | 10.1007/s00382-012-1614-7
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| Scopus记录号: | 2-s2.0-84884700008
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| 论文题名: | Simulation of glacial-interglacial cycles by simple relaxation models: Consistency with observational results |
| 作者: | García-Olivares A.; Herrero C.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2013
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| 卷: | 41, 期:2017-05-06 | | 起始页码: | 1307
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| 结束页码: | 1331
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| 语种: | 英语
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| 英文关键词: | Climatic changes
; Glacial oscillations
; Oceanic CO2
; Paleoclimate
; Relaxation models
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| 英文摘要: | The model of Paillard and Parrenin (Earth Planet Sci Lett 227:263-271, 2004) was modified to obtain a closer fit to δ18O and CO2 time series for the last 800 kyr. The model performance can be improved if its CO2 sensitivity to I65 insolation is eliminated and if different response times are assumed for ablation/accumulation of ice. Correlations between simulated and experimental time series for CO2 and ice volume V increase from 0.59 and 0.63 to 0.79 and 0.88, respectively. According to these models, terminations are produced by I65 amplification through CO2-T and T-CO2 feedbacks, in synergy with an extra CO2 contribution from the deep ocean. This contribution is strongly dependent on ice-sheet extent and ice volume (or alternatively, CO2 concentration, which is a good proxy of Antarctic temperature) but is insensitive to Southern Ocean (SO) insolation on 21 February (I60). Change of deep SO state may be the "order parameter" for nonlinear deglacial changes. According to these models, 100 kyr periodicity of glacial cycles arises from the characteristic time of Antarctic ice sheet advance to the continental slope. © 2012 Springer-Verlag Berlin Heidelberg. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/54810
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Instituto de Ciencias del Mar (CSIC), Ps. Maritim de la Barceloneta, 37-49, 08003 Barcelona, Spain
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| Recommended Citation: | |
García-Olivares A.,Herrero C.. Simulation of glacial-interglacial cycles by simple relaxation models: Consistency with observational results[J]. Climate Dynamics,2013-01-01,41(2017-05-06)
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