New research documents that the Roman and Medieval Periods were warmer than the modern era across Northern Europe, plus establishes that a slight cooling trend exists - the inconvenient global warming science facts
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In addition, this study indicates that Northern Europe has been slightly cooling over the last 2,000 years. Although this study is not global in nature, it does corroborate the cooling trends found in both the Greenland and Antarctica ice cores.
The study also confirms that climate warming has taken place since the Little Ice Age but it is not "unprecedented" when compared to earlier periods.
"An international team including scientists from Johannes Gutenberg University Mainz has published a reconstruction of the climate in northern Europe over the last 2,000 years based on the information provided by tree-rings...used tree-ring density measurements from sub-fossil pine trees originating from Finnish Lapland to produce a reconstruction reaching back to 138 BC...have been able for the first time to precisely demonstrate that the long-term trend over the past two millennia has been towards climatic cooling...“We found that previous estimates of historical temperatures during the Roman era and the Middle Ages were too low,” says Esper. “Such findings are also significant with regard to climate policy, as they will influence the way today’s climate changes are seen in context of historical warm periods.”" [Jan Esper, David C. Frank, Mauri Timonen, Eduardo Zorita, Rob J. S. Wilson, Jürg Luterbacher, Steffen Holzkämper, Nils Fischer, Sebastian Wagner, Daniel Nievergelt, Anne Verstege & Ulf Büntgen 2012: Nature Climate Change]