Every time history repeats itself, the price goes up:
Foreshadowing potential climate chaos to come, early global warming caused unexpectedly severe and erratic temperature swings as rising levels of greenhouse gases helped transform Earth, a team led by researchers at UC Davis said Thursday.The global transition from ice age to greenhouse 300 million years ago was marked by repeated dips and rises in the amount of carbon dioxide in the atmosphere and wild swings in temperature, with drastic effects on forests and vegetation, the researchers reported in the journal Science.
The provocative insight into planetary climate change counters the traditional view that global warming could be gradual and its regional effects easily anticipated.
Over several million years, carbon dioxide in the ancient atmosphere increased from about 280 parts per million to 2,000 ppm, the same increase that experts expect by the end of this century as remaining reserves of fossil fuels are burned.
Comments (3)
Ok, sow when the scientists tell us that CO2 has never been so high, that's wrong? And when they tell us that CO2 comes from human activity, that's suspect as well?
Posted by: Confused | January 5, 2007 11:30 AM