On average, the whole world has already warmed by more than 1 degree Celsius per year compared to 1850, explains Van der Wiel, but there are regional differences. For example, land surface warms up faster than sea surface. “The Netherlands has therefore already warmed by an average of 2 degrees annually. And if you only look at the average temperature of the hottest day of the year in the Netherlands, it is already about 4 degrees higher,” says Van der Wiel.
KNMI: Warm days are now even warmer due to climate change
