Nothing ground breaking here but recent research shows a ‘global pattern’ of change that begun 2.7 million years ago.There seems to be a feedback process which has amplified climate change.
Dr Carrie Lear told BBC News that “this study reveals a feedback process that has magnified climate change since the inception of Northern Hemisphere glaciation 2.7 million years ago. It seems the tropical warming caused by high CO2 levels set off a chain of events resulting in additional greenhouse gases, including water vapour, being released to the atmosphere, thus causing further warming.”
You can read more of the article here:
or look in the journal “Science” for the full article.