Interesting conclusion to Little Ice Age (Regional - Asia: China) – Summary:

"In light of these several observations, it is clear that the Little Ice Age was manifest in China as a cold node of the millennial-scale oscillation of climate that brought this vast region, as well as most of the rest of the world, the Roman Warm Period, the Dark Ages Cold Period, the Medieval Warm Period and the Modern Warm Period, which suggests there is nothing unusual about the planet's current state of warmth and, therefore, that there is no need to invoke the historical increase in the air's CO2 content as its cause."