Category Archives: Climate Change

Deeper Doo Doo for Dendrochronology

Posted on February 20, 2012 by gymnosperm

Indices of the Pacific Decadal Oscillation are in close agreement for the period of the last seventy years. The NASA Multivariate Index and the Mantua Index only go back a hundred or so and they correlate very closely. These shorter … Continue reading →

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Picturesque

Posted on February 12, 2012 by gymnosperm

So if the oceanic circulation looks like this: And the resulting 2500m (deep) ocean age looks tile this:  Then what does this mean? Why should a PDO index that basically describes which side of the Pacific Ocean the ancient deep water … Continue reading →

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Viejo indeed! When the big dog stirrs…

Posted on January 29, 2012 by gymnosperm

El Viejo, (the old one) is an alternative name developing for the La Niña phase of the El Nino Southern Oscillation, ENSO. Much has been written on the impact of ENSO on global temperature, and many are coming to understand the importance of … Continue reading →

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528 years of PDO, the long skinny one.

Posted on January 23, 2012 by gymnosperm

        Quite a bit lost in the upload but here is the complete Shen Index plotted on three graphs and cobbed together (Excel tops out at 255 per series). Most of the time the index has been … Continue reading →

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And so goes PDO…

Posted on January 22, 2012 by gymnosperm

The first thing one notices is that this historical index shows the Pacific Oscillation to be far more medicentennial than decadal. This bears some further work for this wonderful index:  Shen, C., et al. 2006. Pacific   Decadal Oscillation Reconstruction. IGBP … Continue reading →

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What is going on here?

Posted on January 14, 2012 by gymnosperm

I was going to do a little excel graph plotting a nice el nino/viejo index readily available from the Japanese Meterological Association (JMA) from 1864 to present against precipitation for the same period in the San Francisco area. I am … Continue reading →

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