Peer reviewed study: Winters Warmer in MWP in Northern Norway

CO2 Science reports on a paper published in Polar Research 30:

Thousand years of winter surface air temperature variations in Svalbard and northern Norway reconstructed from ice core data

Dmitry Divine, Elisabeth Isaksson, Tonu Martma, Harro A.J. Meijer, John Moore, Veijo Pohjola, Roderik S.W. van de Wal, Fred Godtliebsen
Citation: Polar Research 2011, 30, 7379, DOI: 10.3402/polar.v30i0.7379

Full Text:

What was learned
The winter surface air temperature reconstructions, which are depicted in the figure above, begin at the peak warmth of the Medieval Warm Period at approximately AD 800, and they decline fairly steadily to the coldest period of the Little Ice Age at approximately AD 1830, after which they rise into the 1930s, decline, and then rise again, to terminate just slightly lower than their 1930s' peaks near the end of the 1990s.

What it means
Not only is there nothing unusual, unnatural or unprecedented about the most recent surface air temperatures at Longyearbyen and Vardo, it is pretty clear that it was significantly warmer at both locations during the peak warmth of the Medieval Warm Period, when there was way less CO2 in the atmosphere than there is today. And this observation suggests -  that anthropogenic CO2 emissions are not the great threat to humanity and the biosphere that climate alarmists claim them to be, for something in the environment appears to be effectively counteracting whatever "greenhouse effect" they may produce.

Read More at CO2 Science (LINK): See also CO2 Science's Medieval Warm Period Project