There’s no doubt the earth has undergone periods of relatively abrupt warming and cooling in the distant past. We know it defines the onset of the Pleistocene for example, marking the beginning of classic ice ages. I doubt you can find a biologist who thinks either one could happen without affecting ecosystems far and wide. But how long before the usual suspects strip out the paleo-climate and atmospheric context of this and enlist it to confuse the laypublic on climate change? [Read more…]