Periodic Climate Oscillations (Central European ~250-yr cycle)

First published: 2013

Brief summary

Analysis of a 2000-year Austrian stalagmite record and central European instrumental data finds a dominant ~250-year temperature cycle, with evidence of period-doubling route to chaos.

Article

Periodic Climate Oscillations (Central European ~250-yr cycle) is a blog summary of peer-reviewed work published by Watts Up With That (summarizing Ludecke et al.) in 2013. It analyses a 2000-year Austrian stalagmite record and central European instrumental data and finds a dominant ~250-year temperature cycle, with evidence of period-doubling route to chaos.

Period ~250 yr (also ~125 yr sub-harmonic). It also considers spectral and wavelet analysis shown. The data source is Spannagel cave stalagmite + 6 European instrumental series. This gives the cycle claim a specific numerical and evidential setting rather than presenting periodicity only as a visual impression.

The article reports the following result: The overall temperature development since 1780 is part of periodic temperature dynamics prevailing already for ~2000 years. The dominant ~250 year period peak in the spectrum is corroborated using a 2000-year stalagmite record from the Spannagel cave, Austria. The interpretation is strongest when it survives proxy uncertainty, model choice, dating error and comparison with established solar, orbital and ocean-atmosphere forcing.

For cycles researchers, the article brings together 250-year climate cycle, stalagmite records, central european climate, period doubling. It is relevant to climate-cycle research because observed periodicities may arise from orbital forcing, solar variability, ocean-atmosphere dynamics or internal stochastic behaviour.

Because it is a blog summary of peer-reviewed work, the article is a strong starting point for discussion in the Climate & Weather forum, although its conclusions should still be compared with later replications and updated datasets.

Source details and credits

• Source / publisher: Watts Up With That (summarizing Ludecke et al.)
• Source type: Blog summary of peer-reviewed work
• URL type: WWW
• Credits: Watts Up With That (summarizing Ludecke et al.)
• URL: https://wattsupwiththat.com/2013/05/04/periodic-climate-oscillations/