LDRA wrote:Probably in extreme cases, going from 30kft to 43kft
Francoflier wrote:Interesting. I originally thought that the reflective effect of contrails tended to counteract their tendency to accentuate the greenhouse effect.
I guess not.
I seem to recall a study made during the 2010 Iceland volcano eruption that a net (small) temperature increase was recorded over Europe as a result of the lack of contrails.
Either way, their effect is visibly much greater than we thought.
YYZYYT wrote:And it looks like a solution is simple - fly at an altitude where humidity does not promote the formation of contrails. But that is also not so simple, since that altitude is not constant... the suggestion is that aircraft could be fitted with sensors which report data to ATC, so that flight levels are assigned to avoid certain conditions. Possible, although it would adds a layer of complexity to ATC.
atcsundevil wrote:Please stick to aviation discussion here. Discussion about climate change should occur in the Non Aviation Forum.
amstone17 wrote:atcsundevil wrote:Please stick to aviation discussion here. Discussion about climate change should occur in the Non Aviation Forum.
Odd statement to make, this is an aviation story that happens to have a climate change factor. It belongs here just fine. People want to discuss a proposal to change cruising altitudes for airliners. How is that NOT related to aviation?
SuseJ772 wrote:I find this to be the oddest thing yet out of Climate Change studies. I know I am going to get slammed for this one, but this research is awful and it's conclusion is worse. The idea that changing altitudes to prevent contrails will have any impact on Climate Change is absurd.
Even if we agree with the premise of the research findings (that contrails have a negative impact), the shear amount of contrails in the sky is so infinitesimally small at a square mileage ratio of contrail to total atmosphere (let alone it's cubic mileage ratio), that this would have no overall impact on anything in our ecosystem.
I am not arguing for or against climate change in this. What I am saying is that this research is awful. Also, airlines fly at the most optimized altitudes they can for winds. They have a huge vested interest in using as little fuel as possible. To say that we are going to fly at different altitudes to counteract something that takes up such unbelievably low amount of space (whether square or cubic) at the cost of less optimized winds and more fuel burn is asinine to me. We have all lost it.
flyingturtle wrote:LDRA wrote:Probably in extreme cases, going from 30kft to 43kft
Nope. The altitude changes required would lead to a minuscule amount of additional fuel burn.
The crux is giving ATC (or the crews) the tools to detect layers of low humidity, so they can avoid contrail-forming conditions, or at least fly at an altitude where contrails would dissipate faster.
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