This last year there was an increase in melting of ice in Greenland because of increased sunshine. Guess what?! There were very, very few airliners on those northerly trans-Atlantic routes that cross Greenland last summer, meaning a loss of all of those cirrus clouds (contrails) and hence more sunshine and more ice melting.
You are confusing causation and correlation. There was less traffic AND there was an increase in ice melt, you have not shown and probably will not find a causative link. Your deductive reasoning is incomplete in that there are other factors you have not considered.
Then there's the comment about contrails (which, as has been pointed out, become 'ice particle clouds' within a second or so of being formed):
That depends. Sometimes the ice crystals persist, at other times they evaporate, dumping water vapour into the atmosphere, water vapour which in itself is a potent greenhouse gas.
I can assure you that there are (in normal circumstances) many, many, many more contrails on the daytime side of the earth than on the night-time side of the earth. (Been there, seen that!)
Have you never wondered where they went? And what happened to the water vapour?
If you are worried about global temperature rises and ice melt, we need more airliners flying!!
ignoring the NOx, CO2 et al which add to the greenhouse effect.