Aviation-associated weather does profoundly affect temperature?

While clouds, including aviation-associated contrails may lower temperature by
reflecting solar radiation off the planet in what is known as the "albedo"
effect, they may also raise temperature by blanketing trapped heat preventing
its nighttime radiative dissipation

In
fact, NASA's
Earth Observatory states that "NASA scientists have found that cirrus
clouds, formed by contrails from aircraft engine exhaust, are capable of
increasing average surface temperatures enough to account for a warming trend in
the United States that occurred between 1975 and 1994"

The point,
however, is that aviation-associated weather does profoundly affect
temperature#

It is not necessary to believe in clandestine
geoengineering programs, or malevolently dispensed chemical
trails, in order to see the effect that modern day aviation is having –
visibly -- on our skies Billions of pounds of jet fuel are burned each year,
adding a vast amount albeit mostly invisible of chemical pollution to our
environment

While the mainstream still considers the persistent
condensation trails formed by jets to be a harmless and ephemeral, a growing
sector of the public is increasingly concerned about the "chemtrails" they are
seeing blanketing the sky – a term, in fact, which generates millions of
searches and web page results through Google, but is equated with "conspiracy
theory" via automatic
redirection on sites like Wikipedia or Dictionary.com.

Considering
the results of the Nature article, there can be little doubt that these
trails are having a profound effect on weather right now, and such a profound
one, that within just three days of their cessation, a massive temperature
anomaly occurred over a surface area of 9,326,410 sq km, the land mass of the
United States.

If, and that's a big IF, these temperature anomalies are
a result of the absence of only jet exhaust, which we are told are "mostly water
vapor," the unintended cloud-producing effects of commercial aviation taken in
its totality is already unintentionally a global form of geoengineering qua
effects. Simply viewing a satellite image of commercial jet
paths reveals how artificial clouds are now overtaking natural ones.