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Interestingly, notes Carleton, since the 1970s the frequency of contrail formation has outpaced the increase of air traffic in these areas. If this trend continues, he says, it could further decrease daily temperature ranges and even evaporation for those regions, a change that could be detrimental to certain trees, plants or insects sensitive to temperature and moisture changes.
Returning to the fact that only 10% to 20% of the country’s airspace is conducive to forming contrails at any given time,
The simulations show that even in areas
suitable for contrail formation, only a small fraction of all flights produce persistent
contrails that are detectable by satellite.
if T > -40°C, RH > 100%
-need activated ice nucleus, pattern for the crystal
- aircraft icing: plane is a big nucleus