[DominikPeters]

Given that the warming impacts of contrails are short-lived (roughly a day), I think it is a good idea to do research now on the weather forecasting needed to avoid producing contrails. But I don't really see a reason to actually start avoiding them now, with the associated costs in terms of fuel, CO2 emissions, and time. We can start avoiding them in a few decades when it might have become urgent to have cooling.

[evnp]

Aren't the impacts perpetual if we're creating new contrails every single day?

Taken from another comment, this seems pretty clear:

> Contrail cirrus may be air traffic's largest radiative forcing component, larger than all CO2 accumulated from aviation, and could triple from a 2006 baseline to 160–180 mW/m2 by 2050 without intervention.

[1] https://en.wikipedia.org/wiki/Contrail#Impacts_on_climate

The original article describes associated costs in time and fuel usage in the realm of 1% increase.

[SupremumLimit]

Not sure how you haven't noticed, but climate change is already affecting precipitation and drought patterns, it exacerbates heatwaves, cold snaps, and flooding, it affects harvests, disrupts ecosystems etc. etc. Reducing warming is an urgent matter.

[14]

There was a really good section of the article that went into great detail of the math and how it would easily outweigh the CO2. How it would only require something like diverting 2% of all flights as it is only that percentage of flights that make the majority of the contrails and that the diversion of the average flight would be something small like an extra 2 minutes flight time for shorter flights and like 6 minutes on a longer flight which the article states is not much increase in fuel consumption as well as not such a time increase to dissatisfy customers. So if the article is accurate in their math then the associated costs in all three fuel, CO2, and time are not an issue.

[wasabi991011]

Given the feedback loops associated with climate change, I'd expect early interventions to have a larger impact on the climate than later ones.

[stevage]

It is already urgent.

[lukan]

It was urgent 40 years ago.