The polar zones have the greatest variation in insolation between summer and winter.
On the 21st of June there are therefore two maxima of insolation, one at lat.
The relative amounts of insolation received at different latitudes and at different times have been carefully determined.
The tropical zone has the least annual variation of insolation.
Stupor rather than sleep is the consequence of insolation and of exposure to great heat from artificial sources.
They also have the minimum amount of insolation for the whole year.
The intensity and seasonal distribution of insolation are prime factors on which many important results hinge.
Length of the period of basking is determined not only by amounts of insolation and temperature but also by the size of the snake.
The values of insolation are shown by the vertical distance above the plane of the two margins.
These last conditions can be readily traced to the effects of insolation and radiation near the ground.