|| Am I reading this correctly? Is this 'sun angle'?
| It's the Earth's tilt that determines seasons, yes.
| The Earth is actually closest to the Sun in winter and furthest in
| summer, but the northern hemisphere is tilted toward the Sun in
| summer and receives more of those parallel rays and, hence, is
I wasn't aware that our orbit is eccentric. During winter the
atmospheric filter is "deeper" and the sun is behind the horizon
longer so that the daily heating period is both weaker and shorter.
| I have a problem with the maps, too, though. Because not only are
| solar panels receiving more rays in summer, but the days are also
The panels would receive more direct radiation in summer if they were
horizontal. A vertically-oriented panel actually receives less. Not
only that, the glazing on a vertical panel reflects more of the light
away during the summer (like a poorly silvered mirror).
| Sounds like a good experiment for me to setup this winter.
It could be interesting.
DeSoto, Iowa USA