• Medieval warming period in China and South America warmer than modern temperatures

    by  • February 14, 2010 • All Whoppers, Climategate, Featured Articles, General, Newly Added Stories • 6 Comments

    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.”

    temp data chinese mwp

    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?

    6 Responses to Medieval warming period in China and South America warmer than modern temperatures

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    2. April 27, 2010 at 3:45 pm

      I have to say, I enjoy reading your post. Maybe you could let me know how I can subscribing with it ? I feel I should let you know I found this site through yahoo.

    3. babelfish
      July 15, 2010 at 2:46 pm

      If global climate change science was only about temperatures in one or two locations–then you might have something here. But there is a lot more to the science than local temperatures…like global temperatures, composition of atmospheric gasses, ocean currents, glacial ice. An example of the problem that does not include temperature per se :Slowly melting glacial ice is the main water source for many people living near mountain glaciers. When the glacier completely melts there will be no more water. And it won’t matter if the earth is 1 degree or 10 degrees hotter, because those people still won’t have ANY water supply. It really isn’t about warming, its about global changes that will have a variety of effects across the globe.

    4. frfr
      February 7, 2011 at 10:22 am

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    5. frfr
      February 7, 2011 at 10:22 am

      Good post. Bam!

    6. Dee
      May 27, 2011 at 6:17 am

      Wow. The commenters are, for the most part, eating up this crap. What caused the MWP??? That’s easy, but you don’t want to hear it. You’d rather point to a REGIONAL variation in temperature and somehow think that means the rapidly increasing temps today have any relation. Increasing CO2 is not the only cause – it’s the cause for the current warming (given that they’re now 100 ppm above the natural high level of CO2 of 300 ppm). Other cause exist to temporarily warm a region on Earth. Low volcanic activity, increased solar radiation or an increase in the strength of the Gulf Stream can bring more warm air north. That alone can do it and the following LIA is indicative of the warming decreasing salinity in the North Atlantic and reducing the Gulf Stream. That is happening today as a side effect of climate change and will cool Europe while the rest of the planet continues to warm. Also, the MWP saw approx 0.2 increase in global temps – that’s over hundreds of years. We are currently seeing a 0.2 increase every decade.

      Facts. They do the open minded good.

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