DOI: 10.1007/s00382-016-3195-3
Scopus记录号: 2-s2.0-84973140787
论文题名: Relaxation oscillations in an idealized ocean circulation model
作者: Roberts A. ; Saha R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-07-08 起始页码: 2123
结束页码: 2134
语种: 英语
英文关键词: Dansgaard–Oeschger event
; Overturning circulation
; Relaxation oscillation
; Thermohaline circulation
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. © 2016, Springer-Verlag Berlin Heidelberg. 资助项目: DMS, Division of Mathematical Sciences
; DMS, Division of Mathematical Sciences
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53287
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Mathematics, Cornell University, 310 Malott Hall, Ithaca, NY, United States; Department of Physics, Bates College, 2 Andrews Road, Lewiston, ME, United States
Recommended Citation:
Roberts A.,Saha R.. Relaxation oscillations in an idealized ocean circulation model[J]. Climate Dynamics,2017-01-01,48(2017-07-08)