Hello, I apologize if this question is very simple but I am not very familiar with climate data.

Is someone able to explain what this "Calculate trends" example outputs in plain english? https://cds.climate.copernicus.eu/toolbox/doc/gallery/31_calculate_trend.html

If I had to guess I would say that the map show the mean temperature change per year in degrees centigrade during the range of years provided.

What is confusing me is the legend is labeled "Stats trend slope (K year-1)". I did some googling but I was unable to figure out what "K year-1" means.

Any help is appreciated. Thanks