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You haven't provided evidence of that. But here's something for you. A Russian test with a truck and a helicopter. They laid out a smoke screen and found that it attenuated visible sunlight. I could have told them that.
Have they conducted trials? Yes
Actually, as I understand it, what people see is the opposite of that. Peristent contrails induce a warming effect.
especially when what people report to see is pretty much what is described on paper as being how they say they would do it,
That leaves 3 catagories left. Cat3: Small scale trials (
Sure, here's one such trial.
A controversial geoengineering experiment to simulate the cooling effect of volcanoes has been cancelled due to concern over a perceived conflict of interest with some of the researchers.
Originally posted by threewisemonkeys
reply to post by tsurfer2000h
You assume the burden of proof is on me, it isn't. You seem to want to make the claim that all there is are contrails. Well, if that is your assertion, prove it.
Ignorance is denying that field trials have been conducted. They have, plenty of info out there on government webites about them for those who can be bothered to take off the blinkers. Whereas Phage would have you believe that the only computer modelling exists, at least that seemed to be his claim.
Ignorance is also believing that if you are not privy to information, this or that does not exist or is not happening. Ive lost count of the cases where those, like Phage, who deny everything except ignorance, shout conspiracy! from the rooftops, only for it to turn out that what do you know, it did actually happen as all the nut jobs thought.
Ignorance is believing that science is always right. If there was ever a use for the acronym LOL, that statement would be it. Science is often skewed, bastardised or just plain fabricated to fit into a certain scientific dogma.
Asking questions, even stupid questions, that is denying ignorance. Yet you, sounds like you just wish people would shut up. What do we call that? Yeah you got it, ignorance.
Are you sure about that?
Pretty sure yeah. That reply wasn't to you. But if the shoe fits...edit on 6-3-2013 by threewisemonkeys because: (no reason given)
Contrails don't trap gases. They trap heat.
these annoying contrails might trap in some gases
I would want to see a comprehensive study that includes both those factors before making this statement ...
That doesn't really have much effect since we don't get precipitation from cirrus clouds anyway. It's more of a swap, more contrail cirrus = fewer natural cirrus. Both have pretty much the same effects on climate. The difference is that contrail cirrus can form where natural cirrus can't. Meaning more high cloudiness (and more warming). The amount of warming hasn't been firmly established. One of the problems is, it's really hard to tell the difference between natural cirrus and aged contrails.
the stealing of water vapor from naturally forming cirrus
Originally posted by bluestorm
a new cloud class ‘contrail cirrus’ , this is what its all about-
I dont care how contrail cirrus are formed whether from water vapor or some other aerosol, the effects are the same, the stealing of my blue days, the stealing of water vapor from naturally forming cirrus, effects on agriculture and the solar industry...
Temporal increase of FdAOTs (440 nm) prevails over newly industrializing countries in East Asia (weighted trends; +6.23% yr−1 at Beijing) and active agricultural burning regions in South Africa (+1.89% yr−1 at Mongu). On the other hand, insignificant or negative trends for FdAOTs are detected over Western Europe (+0.25% yr−1 at Avignon and −2.29% yr−1 at Ispra) and North America (−0.52% yr−1 for GSFC and −0.01% yr−1 at MD_Science_Center). Over desert regions, both increase and decrease of CdAOTs (+3.37% yr−1 at Solar_Village and −1.18% yr−1 at Ouagadougou) are observed depending on meteorological conditions.
its your assumption.