THE SEASON FOR CONTRAILS
. . . and amazing clouds
we don't see any other time of the year.
Autumn brings cold, dry air.
It's how and why we see
totally different clouds.
Contrails are short for
"condensation trails" (vapor trails),
left behind by jet aircraft.
Jet exhaust is carbon dioxide and water vapor.
The water hits the dry, cold atmosphere of autumn,
and leaves frozen straight-line traces in the sky.
Technically, contrails are man-made clouds . . .
but they're more like "chalk lines" against an azure sky.
A sure sign that winter's on the way.
There are many different clouds worth seeing,
now that summer is past.
Some like brush strokes on a blue canvass.
And then there's the sunsets . . .