Mackenzie River Basin Evaporation for January 1985 - 1999

During the winter months evaporation is very low owing to low solar input and low temperatures. The frozen ground is covered, for the most part, by a layer of snow which reflects what little incoming solar radiation is present. At these high latitudes there is very little solar radiation during the winter months but during spring and summer the albedo affect (reflectance of solar radiation) becomes more important as the hours of sunshine are greater. White snow covered surfaces reflect solar radiation but melted water absorbs sunlight causing temperatures to rise. This increase in solar input and rising temperatures leads to greater evaporation observed during the summer months (June to September).

Evaporation Legend (mm/month)

Bargraph referencing the colours on the evaporation maps.

Other Mackenzie Maps

Mackenzie Evaporation Maps