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A Summary of Climate Change over the Past Millennium in China
Reference
Zhou, XJ. 2011. The characteristics and regularities of the climate change over the past millennium in China. Chinese Science Bulletin 56: 2985.

Background
The author - who is with the State Key Laboratory of Severe Weather of the Chinese Academy of Meteorological Sciences in Beijing - writes in an introductory editorial in a special issue of the Chinese Science Bulletin (October 2011) that "research on global climate change has been at the frontier of the contemporary sciences," and within this context he further states that "debate has focused on whether the greenhouse effect produced by human activities is a major factor responsible for modern climate warming."

What was done
Zhou reports that "in 2009, the major project 'Research on tree-ring and millennium climate change in China' was implemented under the support of the National Natural Science Foundation of China." Noting that eight articles published in this special issue of the Bulletin "present partly preliminary results obtained by the project over the past two years," he then goes on to summarize, in the broadest possible sense, their findings.

What was learned
In the words of Zhou, the eight articles "reveal some characteristics and regularities of changes in temperature and precipitation in China and in East Asian monsoons over the past 1000 years," and he says that "notable conclusions," of which he lists only two, are that (1) "temperatures in the Medieval Warm Period are comparable to those in the current warm period over China," and (2) "the effect of solar activity on climate cannot be neglected in any period of the millennium."

What it means
These two findings stand in stark contrast to what is generally claimed by the world's climate alarmists, which is no small matter, as they apply to a significant portion of the planet. Hence, they should give everyone reason to reconsider the climate-alarmist claim that modern warming has been unprecedented over the past millennium or more, which claim is also refuted by many additional scientific studies described in our Medieval Warm Period Project.

Reviewed 18 January 2012