Question

In northern Alberta, the insolation at the top of the atmosphere at the fall equinox is 200W/m². How much of this energy reaches the ground (in W/m²) if 24% is absorbed by the atmosphere and 36% is reflected by the atmosphere? Answer with value only, to one decimal place.

Answer 1

Of 200 W/m2, 24%+36%=60% are lost, therefore, only 40% reach the surface:

$$I=200·0.4=80\text{ W/m}^2.$$