The same analysis as in Figure 2a, but for summer. Summer trends are much less pronounced than winter trends. Models of greenhouse effect have predicted at least this much warming. Climate trends in the Arctic more clearly exhibit the amount of warming predicted by the models than do trends in industrialized latitudes. As predicted by the models, temperature increases are greatest in winter and over high-latitude land masses, primarily because of the feedback effects of snow.
Trends are less obvious in the Central Arctic Ocean, where data is more limited.
Other data sets for Alaska and the Arctic also indicate a warming trend. In Siberia, similar changes have occurred. All these observations are consistent with a warmer and wetter climate in the Arctic, as predicted by the computer models. Click Here Figure 3. Extrapolation over long time intervals also remains problematical.