Quote:
|
Originally Posted by ink.
actually I'm fairly sure ice ages an cold snaps coinside with a critical point in the rise of atmospheric carbon, and we are overdue. I don't know, more than likely the fact that we are stopping the overrun of vegetive and small animal overgrowth that would probably usually have occured in our rainforests to bring back down carbon levels is the reason?
people will probably die of starvation before they need to deal with cold, the ones who survive that will likely face a mother of a winter and crazy animal system..
|
Milankovich cycles:
no, the ice-age cycle has nothing to do with the greenhouse gases patterns.. The ice-ages are caused by the 28,000 year polar-tilt cycle of the earth's rotation as it tilts closer and further away from the sun in its rotation. This is the same cycle that causes our seasons, though on a long term the over-all earth tilts further or closer towards the sun making seasons more extreme. During ice-ages the earth primarily tilted away from the sun, during melting periods it is tilting towards. To add to this, the orbit of the earth around the sun moves on a 3 million year cycle, with the earth coming closer and further away over-all in its distance in orbit around the sun. Ice-ages get more extreme in periods where the earth is drifting away from the sun, and melting periods are more extreme as the earth drifts in orbit closer towards the sun.
Since we had our last ice-age thousands of years ago, we are clearly in a melting period. Compounded on this, the earth is also drifting closer to the sun on its orbit cycle rather than away, so the melting period we are experience in this time is more extreme then the last few 28,000 year cycles..
add to this burning up almost a billion years worth of sequestered carbon in the form of fossil fuel deposits and you have the warmest melting periods in millions of geologic years, though truthfully we are not at the tipping point yet, as in regards to carbon the atmospheric saturation is on par with levels approximately 250,000 years ago...
