Ice Nuclei such as Black Carbon Soot can alter the growth of Ice Crystals, especially that of contrail cirrus ice crystals causing its surface to near complete 'splitting' of LWR off the SWR; its surface 'sheer' directing the LWR directly towards earth.
Contrail shadows have always been an area of fascination for me, absolutely mind-blowing; here's someone hang-gliding through a contrail shadow ;)
So interested in optical phenomena!, I've been collecting contrail shadow pictures ever since I witnessed my first!
So if I was to say ask you what...
I'm getting my head around this paper/monograph at the moment that I find highly intriguing and motivational.
"On the Life Cycle of Individual Contrails and Contrail Cirrus"
'HI, I'm Matt :)
I'm unsure if I'm in the right place to be asking contrail-cirrus related questions and about the science behind it as I've had no science-based education since high-school [I'm 35].
I have had a keen interest and passion wanting to learn and understand all of the sciences...