The data is configured as a scrolling movie of monthly maps from March 2000 through September 2002. You can either left click the link provided (it will open in a separate browser window) or you can right click and select "Save Target As" to save it on your computer and open it locally. You should use free Quicktime software to view this with optimal flexibility.

This is the color key to the maps.

After you become familiar with how to view this movie, stop it at March 2000. March will roughly show Earth's average pattern, because the March Equinox is a time of energy balance between the hemispheres.

Now, describe the general pattern of surplus (+ values shown in green) and deficit (- values shown in blue) in net radiation, and make sure to use approximate latitude values in your answer. What does the color white represent, and at approximately what latitudes (north and south) is it found?

Now, using the concepts of declination, sun angle, and hours of sunlight, explain why this happens.