All around us, the process of photosynthesis is coming to an
end.
During the months when daylight is plentiful, deciduous
trees use chemical pigments like chlorophyll to convert solar energy into
enough nutrients to last them through the winter. The trees use the sunlight to
break down carbon dioxide into organic materials. In the process, they absorb
the colors produced by the sun – except for green.
In the fall, when the amount of available sunlight decreases
rapidly, trees lose their ability to convert light into nutrients, so they
cease to absorb the colors. As the process breaks down, colors in the spectrum
other than green begin to appear in the leaves. Since photosynthesis cannot be
sustained, a layer of cells forms at the base of the lead stem, blocking the
transfer of fluids to and from the trees. The veins in the leaves gradually
close. Having served their purpose, the leaves die and fall to the ground.
At least, that’s one way to look at it.
As interesting as this scientific explanation is, it doesn’t
quite capture the experience of beholding the magnificent colors of fall. Leave
it to God to design a season of death so that it displays an almost
indescribable glory.
Over the weekend, the “autumnal equinox” officially ushered
in the fall season. For the next six months, the sun’s angle in our skies will
be no higher than 45 degrees. The lower light adds richness to the color of the
sky, the leaves, and the sun’s reflection off the clouds. But only for two to
three weeks in any given location will the full panoply of colors splash across
the landscape before fading into the ground. So autumn will be truly enjoyed by
only the most observant.
In just the last couple of days, yellow and orange have
begun to tint the outside of many trees. There are even patches of forest that
are already bright with color. God’s Big Show is starting. Are you ready?
Copyright 2013 by J. Mark Lawson