Plants leaning toward Sun.
icomm5 at netcom.ca
Fri Sep 3 14:55:27 EST 1999
Alfred Falk <falk at arc.ab.ca> wrote >
> Need an astronomy lesson here. It is true that the as you go higher in
> latitude, the sun appears lower in the sky. However, it also makes a
> wider arc around the horizon in summer and shorter in winter. (As not
> much growth takes place in winter, we only need to consider summer.)
> The extreme point is that at the pole the sun rises at spring equinox
> and sets at autumn equinox (assuming idealized point sun and no
> atmospheric effects). The sun then appears to move all the way around
> the sky in one day. As you drop in latitude below the arctic circle,
> the sun increasing dips below the horizon on the north side.
The suspense is unbearable: do sunflowers above the Arctic circle strangle
Did bindweed evolve above the Arctic Circle and then move south? :-)
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