The first time I saw a metallic blue contrail I thought it was just some odd play of light at that particular angle and time of day.
The second time I saw blue razor-thin lines across the sky they existed alongside of the usual white contrails, with the two planes at similar altitudes, normal-looking passenger jets I supposed, visible as they created their tracks across an otherwise cloudless deep-blue sky.
Over the past few months, I’ve seen this maybe a half-dozen times. Ann was with me the last time when we were gathering firewood along the creek. She had no trouble telling that we were looking at distinctly blue contrails.
I have not been able to find out anything to explain if this is a new type of engine, a new type of fuel or if the chemistry of these non-white vapors has changed in other ways.
I’m surprised not to find the chemtrails conspiracy folks all over this. Surely it’s not just the two of us on Goose Creek that see these blue streaks. Anybody else seen them? Any clues as to why they have appeared in the last few months?
Related: contrails matter to climate.
Re-routing flights could reduce climate impact of contrails | MNN – Mother Nature Network