Eurasian Arctic Temperatures of the Past 115 Years
Opel, T., Fritzsche, D., Meyer, H., Schutt, R., Weiler, K., Ruth, U., Wilhelms, F. and Fischer, H. 2009. 115 year ice-core data from Akademii Nauk ice cap, Severnaya Zemlya: high-resolution record of Eurasian Arctic climate change. Journal of Glaciology 55: 21-31.
Working with the uppermost 57 meters of a surface-to-bedrock ice core that was retrieved from the Akademii Nauk (AN) ice cap (~80°31'N, 94°49'E) of the Severnaya Zemlya archipelago (which is located in the central Russian Arctic between the Kara and Laptev Seas), Opel et al. (2009) derived a δ18O history covering the period 1883-1998, which they compared with surface air temperatures (SATs) measured at 15 weather stations distributed throughout the Atlantic and Eurasian sub-Arctic.
These comparisons, in the words of the authors, yielded "good correlations and similarities," and they note that their δ18O data also had "a strong correlation with the composite Arctic (north of 62° N) SAT anomalies time series of Polyakov et al. (2003)," demonstrating that their δ18O data can serve as a proxy for the region's SAT, with the bottom-line take-home message of their study being the fact that "the δ18O values show pronounced 20th-century temperature changes, with a strong rise about 1920 and the absolute temperature maximum in the 1930s." And as shown in the figure below, it can be therefore be concluded that there was no net warming of the Atlantic and Eurasian sub-Arctic over the entire last eighty years of the 20th century.
Figure 1. δ18O (%o) vs. time (Years AD). Adapted from Opel et al. (2009).
It is indeed strange that the portion of the earth that is supposed to (1) be the first place on the planet to exhibit anthropogenic-induced global warming, and to (2) exhibit that warming most strongly, shows no net warming whatsoever over the last eight decades of the 20th century.
Ladd, M.J. and Gajewski, K. 2010. The North American summer Arctic front during 1948-2007. International Journal of Climatology 30: 874-883.