In a post from earlier today we reported on Phil Jones’ amazing admission that the Medieval Warm Period (MWP) may have been warmer than today, but he indicates that it could have been a localized (North America and Europe) warming event:
And he said that the debate over whether the world could have been even warmer than now during the medieval period, when there is evidence of high temperatures in northern countries, was far from settled.
Professor Jones departed from this consensus when he said: ‘There is much debate over whether the Medieval Warm Period was global in extent or not. The MWP is most clearly expressed in parts of North America, the North Atlantic and Europe and parts of Asia.
‘For it to be global in extent, the MWP would need to be seen clearly in more records from the tropical regions and the Southern hemisphere. There are very few palaeoclimatic records for these latter two regions.
A Twitter follower, @redostoneage, pointed out a couple peer-reviewed studies documenting MWP in both China and South America.
Here is Asian temperature data from 2,300 year old trees that shows the Medieval Warm Period was Hotter Than today:
“Zhang et al. conclude that their proxy climate data “reveal that the North Atlantic MWP and the LIA were accompanied by climate changes on the northeastern Qinghai-Tibetan Plateau,” while their comparison with Esper et al.’s data indicates that their data are also well correlated with long tree-ring chronologies from much of the Northern Hemisphere. The research team thus provides important evidence for the broad geographical reach of both the MWP and the LIA.”
In addition, C3 Headlines details this peer-reviewed study that describes the South American MWP:
“In the words of the research team, “the reasonably good correlation between our results (particularly SST) and other continental and marine archives from central-south Chile, Peru, and Antarctica … confirms the occurrence of globally important climatic anomalies such as the Medieval Warm Period and the Little Ice Age.” And, of course, their SST data indicate that the current level of warmth in that part of the world still has a long way to go before equaling the warmth experienced there a thousand and more years ago, which suggests that the region’s current level of warmth is neither unprecedented nor unnatural…”
It’s not just the MWP that global warming advocates try and hide. They also attempt to remove any mention of the Little Ice Age (LIA), because the famous hockey-stick fabrication graph and other ‘proof’ showing rapid temperature increases, typically start during the latter stages of the LIA. The Little Ice Age was an extremely cold period that spanned 500-600 years from roughly the middle of the fourteenth century to the latter part of the nineteenth century. During that 600 years, there were three distinct temperature minimums at 1650, 1770 and 1850.
By starting temperature graphs during the latter stage of a mini ice age, people like Al Gore are able to show what appears to be alarming increases in temperatures, but that is only because they are out of context. The inconvenient truth that Gore and company fail to come clean with is that during a period around 800-1100 AD (just a couple hundred years before the beginning of the LIA) temperatures were much warmer than today. During this time, England was full of vineyards and farming was abundant in Greenland (which has green in its name for a reason).
If man is causing warming now, what caused it 1200 years ago? Was it all the gas-powered cars on the road? Was it the coal-powered power plants? Or, just possibly, was the warming then, like today, simply part of cyclical temperature changes the earth has gone through for millions of years?