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DOI | 10.1007/s00382-016-3195-3 |
Relaxation oscillations in an idealized ocean circulation model | |
Roberts, Andrew1; Saha, Raj2 | |
2017-04-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | This work is motivated by a desire to understand transitions between stable equilibria observed in Stommel's 1961 thermohaline circulation model. We adapt the model, including a forcing parameter as a dynamic slow variable. The resulting model is a piecewise-smooth, three time-scale system. The model is analyzed using geometric singular perturbation theory to demonstrate the existence of attracting periodic orbits. The system is capable of producing classical relaxation oscillations as expected, but there is also a parameter regime in which the model exhibits small amplitude oscillations known as canard cycles. Forcing the model with obliquity variations from the last 100,000 years produces oscillations that are modulated in amplitude and frequency. The output shows similarities with important features of the climate proxy data of the same period. |
英文关键词 | Thermohaline circulation Dansgaard-Oeschger event Relaxation oscillation Overturning circulation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398926400003 |
WOS关键词 | CLIMATE ; ICE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/36308 |
专题 | 气候变化 |
作者单位 | 1.Cornell Univ, Dept Math, 310 Malott Hall, Ithaca, NY 14850 USA; 2.Bates Coll, Dept Phys, 2 Andrews Rd, Lewiston, ME 04240 USA |
推荐引用方式 GB/T 7714 | Roberts, Andrew,Saha, Raj. Relaxation oscillations in an idealized ocean circulation model[J]. CLIMATE DYNAMICS,2017,48. |
APA | Roberts, Andrew,&Saha, Raj.(2017).Relaxation oscillations in an idealized ocean circulation model.CLIMATE DYNAMICS,48. |
MLA | Roberts, Andrew,et al."Relaxation oscillations in an idealized ocean circulation model".CLIMATE DYNAMICS 48(2017). |
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