There's also a need, I think, to work these at multiple time scales. (realclimate.org)
This provides a strategy to obtain a diversity of waveforms with multiple time scales out of the nonlinear interaction of the neural populations and their intrinsic dynamics. (sciencedaily.com)
If the climate shifts hypothesis is correct (this is where I am placing my money), then this is a very difficult thing to untangle, and we will go through periods of rapid warming that are followed by a stagnant or even cooling period, and there are multiple time scales involved for both the external forcing and natural internal variability that conspire to produce unpredictable shifts. (dotearth.blogs.nytimes.com)