Extended Data Fig. 2: Comparison of NGT-2012 with instrumental and model data.
From: Modern temperatures in central–north Greenland warmest in past millennium
a, NGT-2012 δ18O 11-yr running mean anomalies (black) for the period from 1901 to 2011 together with the 11-yr running mean air temperature anomalies from the three Greenlandic coastal weather stations16 Pituffik (green), Upernavik (orange) and Danmarkshavn (purple) of the Danish Meteorological Institute (DMI). Correlation coefficients between NGT-2012 and the individual temperature records are R = 0.87 (Pituffik; P < 0.005, n = 64), R = 0.75 (Upernavik; P < 0.005, n = 111) and R = 0.85 (Danmarkshavn; P < 0.005, n = 63). b, Comparison of NGT-2012 11-yr running mean temperature anomalies (black), where grey shading denotes a ~40 % uncertainty of the temperature reconstruction obtained from the range of plausible calibration slopes (Methods), with the temperature anomalies from the regional climate model MAR3.5.222 averaged across the NGT-2012 sites (Methods) for the time period 1871–2011. c, As b, but for the comparison with MAR3.5.2 Greenland meltwater run-off anomalies. d, as b but for the comparison with the Greenland Blocking Index (GBI)29. Correlation coefficients between NGT-2012 temperature and MAR3.5.2 temperature, MAR3.5.2 meltwater run-off and GBI are R = 0.76 (P < 0.001, n = 141), R = 0.62 (P < 0.01, n = 141) and R = 0.63 (P < 0.005, n = 161), respectively. e, Scatter plot of NGT-2012 temperature anomalies versus GBI. f, Scatter plot of MAR3.5.2 meltwater run-off anomalies versus GBI (correlation R = 0.80, P < 0.001, n = 141). g, Scatter plot of MAR3.5.2 meltwater run-off anomalies versus NGT-2012 temperature anomalies with the blue line indicating a least squares linear regression.
