(an average of 18 mod-
els) is depicted in Figs. 3 (in percentage terms) and 4 (in absolute terms).
In the relative sense, largest changes occur in winter in central Scandinavia and southern
Finland, where more than
5% of incident radiation would be lost (Fig. 3(a)). According
to the t test, the signal is statistically significant at the 1% level. Over the Barents Sea,
the decline is even larger
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