Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2009-02-10
Nonlinear Sciences
Chaotic Dynamics
30 pages, 6 figures, submitted to Paleoceanography
Scientific paper
The glacial cycles are attributed to the climatic response of the orbital changes in the irradiance to the Earth. These changes in the forcing are to small to explain the observed climate variations as simple linear responses. Non-linear amplifications are necessary to account for the glacial cycles. Here an empirical model of the non-linear response is presented. From the model it is possible to assess the role of stochastic noise in comparison to the deterministic orbital forcing of the ice ages. The model is based on the bifurcation structure derived from the climate history. It indicates the dynamical origin of the Mid-Pleistocene transition (MPT) from the '41 kyr world' to the '100 kyr world'. The dominant forcing in the latter is still the 41 kyr obliquity cycle, but the bifurcation structure of the climate system is changed. The model indicates that transitions between glacial and interglacial climate are assisted by internal stochastic noise in the period prior to the last five glacial cycles, while the last five cycles are deterministic responses to the orbital forcing.
No associations
LandOfFree
The bifurcation structure and noise induced transitions in the Pleistocene glacial cycles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The bifurcation structure and noise induced transitions in the Pleistocene glacial cycles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The bifurcation structure and noise induced transitions in the Pleistocene glacial cycles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-19961