Loading ...But climate change has been much more extreme in the past . I still own property in PA , and within a few miles of my land , I can show you exposed rock on a river bank with the imprint of palm leaves ( tropical climate ) , just a few miles from Moraine State Park – large hills of debris scraped from the land Northward by glaciers , and deposited in PA as the climate warmed after the Ice Age a few thousand years ago leaving mountains of debris as the leading edge of the glaciers retreated .
Leif Ericson established a colony in Greenland just a millennia ago when it was warm enough to support farming , but then that colony was wiped out as the climate cooled again .
There are shorter cycles of roughly a decade in duration due to solar activity cycles which are much less extreme , but in my opinion , much more significant than AGW postulates .
During my career I did research on gas solubility in water , and given the immense surface area of water on the planet , I can make a much stronger case for CO2 coming out of solution due to temperature rise from solar activity and resulting in high CO2 in the atmosphere , than I can for the inverse – CO2 greenhouse gas causing significant temperature rise . That is not to deny a possible greenhouse effect , which in my view is insignificant compared with solar variability . Everyone has experienced sudden gas release from a can of warm Coke compared to a very cold can of the same liquid . Another example is fish kill when a lake warms in summer to a point that there is not enough dissolved oxygen in the heated water to support life for the fish . The opposite is true in winter . Fish are frozen into oxygen rich water turned to ice and metabolism slows sufficiently that they survive being frozen in ice in shallow lakes for months , because apparently they derive enough oxygen to support life at that metabolic state .
I will have to drop this line of thought to help my wife with something .
Later , if there are questions .