Well now I'm waiting for Al Gore to fill me in on why human activity is to blame for all that is going on! I mean, it must be Homo sapiens' fault that these nasty perturbations have made the earth wobble so.
Mike Vidal
I have been saying for years that the perturbations in the earths orbit and its axis tilt, along with the variability of the suns output has a much greater effect on our climate than man. This just vindicates what I have been saying.
The Bishop of D
The meaning of stability is different for self organizing nonlinear dynamic systems than for linear systems. A stable self organizing nonlinear dynamic system oscillates between limits (the Lorentz, or "butterfly" strange attractor is an excellent example).
No - I thought anthropogenic effects were the only things that affected climate. Are you telling me there are more? Crazy, man!
Why are we wasting time looking at other things when we need to focus on devastating our energy industries? First things first ! We can look at geo mechanical effects later.
We still need to get rid of fossil fuels.
Cue the climate change deniers yapping about how this proves that human activity isn't causing the effects of climate change. Really? Folks, try reading the article carefully -- like the part about how "this longer cycle has been hypothesized based on calculations of the movements of planets" -- and you'll find that this isn't a new wrinkle in the calculation of climate models.
Gary Kerkin
Pryor you shouldn’t “cherrypick” the information. By all means quote from the article but, please, if you are quoting to make a point ensure that you quote the complete thing. Yes, the cycle was hypothesised, but the author of the article wrote: “Previously, this longer cycle has been hypothesized based on calculations of the movements of planets, but now researchers from Columbia University and Rutgers University have found the first physical evidence for it.” This is the essence of science: form a hypothesis, find a method of investigating it, collect data by the methodology, then accept or reject the hypothesis based on the results. This study looks like the first step in establishing the presence of a longer Milankovich cycle.
The Earth orbits the sun, but the sun orbits the centre of the galaxy, and at regular 150 million year intervals, the solar system passes through the arms of the galaxy. When it does, interstellar dust in the arms attenuate the suns radiation reaching Earth. This usually causes a major ice age, that can last for millions of years. The Earth is in one of these now! The climate has been steadily cooling for the last 30 or so million years. This inter ice age, is the coldest it has been since the Permian Extinction, some 270 million years ago, and also has the lowest level of Atmospheric CO2, in spite of claims to the contrary by the carbon tax scammers. This 'galaxian ice age' could be a repeat of the one that ended 600 million years ago, when the Earth became a 'snowball' for about 100 million years. Here's a link to a graph showing the climate for the last 600 million years. http://www.geocraft.com/WVFossils/PageMill_Images/image277.gif The 150 million year cold periods are very clear. Malenkovitch cycles are superimposed on these galaxy induced events. Also the path of the solar system is not in the plane of the galaxy, but follows a sinusoidal path passing through the plane at around 30 million years intervals. This also caused climatic changes.
Old J Hawthorne
Whether by human intervention or not, climate change is just one problem, and it's not going to change anytime soon. What we can do is disrupt the cycle of countries that routinely dump garbage in the oceans and try to do something about the garbage that is already there...and there are other problems we can actually do something about. Changing to LED light bulbs, for instance, will not make any difference to the climate.