Chinese scientist finds 2,000 years of not-hockey stick.

There was no Medieval Warm Period in China. No little ice age either. Not warm in Roman times either.

Obviously CO2 controls this climate.

(Click to enlarge)

Quansheng et al show that weather is lumpy, that modern warming is a lot like past warming. They go so far as to say that there are regular cycles and hint that sun might have something to do with it, and volcanoes.

“…centenial variation is significantly correlated with long-term changes in solar radiation—especially cold periods, which correspond approximately to sunspot minima, as well as the frequency of large volcanic eruptions.”

They go on to say that rate of warming was about half a degree per century lately. It may have been the fastest rate, but then again, it may not. It was hard to tell with the error bars being so wide. It was all done with proxies and has a ten year resolution. Obviously it is in need of having homogenadjustoided thermometer data added after 1960 as is the custom in climate science.

Abstract

This paper presents new high-resolution proxies and paleoclimatic reconstructions for studying climate changes in China for the past 2000 years. Multi-proxy synthesized […]