Donna wrote:I don't know what is so significant about the Holocene Climatic Optimum for denialists. We know what caused it.
Well if you understood the first thing about the catastrophic anthropogenic climate change hypothesis you'd know that it doesn't matter what caused it. The alarmist claim is not that Co2 alone can dangerously heat the planet, it's that the small amount of warming caused by anthropogenic CO2 emissions will trigger a series of positive feedbacks and it's the feedbacks that are dangerous. It doesn't matter what the source of the heat is that triggers the feedbacks, heat is heat.
So the significance of the holocene warm period is that it shows that the warming we're experiencing today isn't unprecedented, the planet was warmer during the holocene and no cataclysmic runaway feedback effect occurred.
We know it wasn't global.
We don't know that it wasn't global. There's evidence that it was global and the claim that it wasn't comes from extremely dubious reconstructions based on sparse, unreliable proxy data and questionable statistical analysis.
Is it their argument that we're having another one?
your smug incompetence is ridiculous.
Arnold J. Toynbee