Dust flux, Vostok ice core

Dust flux, Vostok ice core
Two dimensional phase space reconstruction of dust flux from the Vostok core over the period 186-4 ka using the time derivative method. Dust flux on the x-axis, rate of change is on the y-axis. From Gipp (2001).

Monday, November 7, 2011

Inference of dynamics for complex systems: Examples, part 2

A few more examples, as I have been under the weather and am also in last minutes of preparing to return to Ghana.

This chart, composed from monthly closing prices, covers the last fifteen years of the gold-silver ratio. As feared, the gold-silver ratio has reverted to its long-term (~10 year) area of stability, so regrettably we can only characterize the past year's action in silver as an excursion.

Once again, from The recent drop in the price of copper shows up well here at the right of the graph. In contrast to the first figure, this plot suggests that the fun with silver isn't over yet, and that silver is still doing great things in phase space. We may finally be seeing a long-term change in the relationship between silver and other commodities. We will have to wait and see how it unfolds over the next year or so.

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