So somehow, the temperature in Holland,a coastal flatland bounded by the sea and no natural terrestial boundaries such as mountains, is two degrees warmer than neighboring Germany, or Belgium? Huh????
Perhaps the Dutch have surrendered to and are now secretly collaborating with global warming!
I suspect that other European countries would show similar warming. Global surface warming is slower than NH land surface warming primarily due to the heat capacity of the oceans. The SH, dominated by ocean surface, shows a much slower rate of warming because the ocean surface waters are warming more slowly, as the deeper ocean waters absorb some of the heat and because it requires a lot more energy to raise water temperatures a few tenths of a degree than for the same amount of temperature rise over land.