They may be on way out.. anyway___hyperbolically related

to your 'cancer' quip -

Depending on how much (how good / how convincing..) become the studies of effects of stratospheric jet-fuel residuals: remember the study made in the days after 9/11?
(Because it was the first time in decades, it was possible..)
Nova gave it an hour, a few months back.

"Dimming of intensity of visible light" over recent decades (and the instruments for comparing such measurements are pretty elementary.) What was different? One thing:

NO JETS OVERHEAD. None, nada, zippo.

Etc. 'Course we can and likely shall rationalize the indispensability of jillions of commercial flight-miles and $$$$ - after all, we just don't Do long-term anything. But this cat is out of the bag: and it's only a little-early for deciding that the effects are nontrivial. Just a load o' Physics Fun to be fleshed out.

Quantization should be er, a gas - especially in a culture that is being inculcated with associating science with the Debbil, and is expecting trumpeters to descend any old day now - playing Taps.

'Course what do I know -?- maybe Corporate-science IS the Debbil; lucky we invented that all-purpose icon..

Having almost all air traffic grounded for a few days allowed a comparison to be made of the effect of aircraft on clouds, etc.

E.g. [link|http://facstaff.uww.edu/travisd/pdf/jetcontrailsrecentresearch.pdf|Contrails reduce daily temperature range] - a 1 page article from Nature. Basically, the contrail clouds reflect light during the day and act as a blanket at night to reduce the maximum daily temperature range. The temperature range was about 1 degree C larger when the planes were grounded than the 3 days before; 3 days later (when the planes were flying again) the temperature range was about 1 C less than the 3 days before 9/11.

The sky was interesting those 3 days. We may be the last people to see such a sky over cities in the US.

Cheers,
Scott.

Post #268,372 by Ashton 9/22/06 7:26:49 PM Reply	They may be on way out.. anyway___hyperbolically related to your 'cancer' quip - Depending on how much (how good / how convincing..) become the studies of effects of stratospheric jet-fuel residuals: remember the study made in the days after 9/11? (Because it was the first time in decades, it was possible..) Nova gave it an hour, a few months back. "Dimming of intensity of visible light" over recent decades (and the instruments for comparing such measurements are pretty elementary.) What was different? One thing: NO JETS OVERHEAD. None, nada, zippo. Etc. 'Course we can and likely shall rationalize the indispensability of jillions of commercial flight-miles and $$$$ - after all, we just don't Do long-term anything. But this cat is out of the bag: and it's only a little-early for deciding that the effects are nontrivial. Just a load o' Physics Fun to be fleshed out. Quantization should be er, a gas - especially in a culture that is being inculcated with associating science with the Debbil, and is expecting trumpeters to descend any old day now - playing Taps. 'Course what do I know -?- maybe Corporate-science IS the Debbil; lucky we invented that all-purpose icon..
Post #268,375 by Another Scott 9/22/06 8:18:59 PM Reply	There were some post 9/11/2001 studies on this. Having almost all air traffic grounded for a few days allowed a comparison to be made of the effect of aircraft on clouds, etc. E.g. [link\|http://facstaff.uww.edu/travisd/pdf/jetcontrailsrecentresearch.pdf\|Contrails reduce daily temperature range] - a 1 page article from Nature. Basically, the contrail clouds reflect light during the day and act as a blanket at night to reduce the maximum daily temperature range. The temperature range was about 1 degree C larger when the planes were grounded than the 3 days before; 3 days later (when the planes were flying again) the temperature range was about 1 C less than the 3 days before 9/11. The sky was interesting those 3 days. We may be the last people to see such a sky over cities in the US. Cheers, Scott.
Post #268,379 by drewk 9/22/06 8:46:44 PM Reply	And I was too busy moving to notice === Purveyor of Doc Hope's [link\|http://DocHope.com\|fresh-baked dog biscuits and pet treats]. [link\|http://DocHope.com\|http://DocHope.com]
Post #268,639 by mmoffitt 9/25/06 3:24:22 PM Reply	Interesting. Thanks! bcnu, Mikem It would seem, therefore, that the three human impulses embodied in religion are fear, conceit, and hatred. The purpose of religion, one might say, is to give an air of respectibility to these passions. -- Bertrand Russell

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