Posted on 01/10/2006 11:57:27 AM PST by Daralundy
Many palaeoclimate records from earth's North Atlantic region depict a millennial-scale oscillation of climate, which during the last glacial period was highlighted by Dansgaard-Oeschger events that regularly recurred at approximately 1,470-year intervals.
Because of the consistency of their occurrence, it was long believed that these well-tuned periodic events were orchestrated by similarly-paced solar activity; but a major problem with this idea was that no known solar process or orbital perturbation exhibited the periodicity of the Dansgaard-Oeschger events.
Now, however, Braun et al. (2005) have performed an analysis that successfully explains this dichotomy. Noting that the periods of the well-known DeVries-Suess and Gleissberg solar cycles (~210 and 87 years, respectively) are close to prime factors of 1,470 years, the team of eight German scientists opined that "the superposition of two such frequencies could result in variability that repeats with a 1,470-year period."
They did more than opine about the matter; they proceeded to show, in their words, that "an intermediate-complexity climate model with glacial climate conditions simulates rapid climate shifts similar to the Dansgaard-Oeschger events with a spacing of 1,470 years when forced by periodic freshwater input into the North Atlantic ocean in cycles of ~86 and ~210 years." The researchers' goal in this exercise was "not aimed at suggesting a certain mechanism for solar influence on freshwater fluxes," as they describe it, but merely to demonstrate that "the glacial 1,470-year climate cycles could have been triggered by solar forcing despite the absence of a 1,470-year solar cycle," which objective they admirably achieved.
For the same reason, and also without specifying a particular mechanism, Braun et al.'s exercise suggests that the similarly-paced millennial-scale oscillation of climate that has reverberated throughout the Holocene (but with less perfect regularity) is also driven by the combinatorial effect of the DeVries-Suess and Gleissberg solar cycles.
(Excerpt) Read more at co2science.org ...
* crickets chirping *
LOL... </sarcasm>
Start that sucker. Turn it off. Then start it again. Give them a double dose. ;-D
Real math trumps religion of CO2?
Yeah, I'll do that next time! Oh, your name is pronounced "jin-jiss", right? ;-)
The final logical extension of these observations should be obvious to all: the global warming of the past century or so, which propelled the earth out of the Little Ice Age and into the Current Warm Period, was in all likelihood a result of the most recent upswing in this continuing cycle of solar-induced climate change. Hence, there is no longer any need to consider the historical rise in the atmosphere's CO2 concentration as being the primary driver of 20th-century warming. Like everything else climate alarmists lump along with it, the much-maligned greenhouse gas was merely "along for the ride" on earth's eternally-oscillating climatic roller coaster whose operator is the sun.
Two frequencies should exist..
296 years
123 years..
Anyone see a correlation ??
The 296 year beat probably tracks the price of beer at the wholesale level in Western Europe.
Close enough for me.. Sounds scientific...Fer Sure..
There are plenty of little-published scientific studies of recent (this century) changes in solar energy activity on massive scales and "global" atmospheric changes, some very recent, with every planet in our solar system for which our scientific rockets and telescopes have conducted studies.
"Global warming" is solar and the solar changes are due to energy cycles of the sun and changes in the inter-stellar medium as the Sun migrates around the galaxy.
-b-
This would also explain why the ice caps are shrinking on Mars.
BTTT!
Remember what Gandalf said in Moria when he realized he was about to confront a Balrog?
Holy Crap !! It's a friggin' Balrog !!!
That's not an exact quote from the canon, of course.
sorry, couldn't help it...
I don't remember. Refresh us, please, and kindly get to the point, if you would be so kind.
Hopefully that gets to the point. This is an interesting study; I'd like to read it directly instead of filtered.
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