Vapour trails

In article , Newps wrote:

Larry Dighera wrote:



What seems infinitely more significant is the awesome magnitude of
exhaust spewing from airliners as a result of burning 18,536,000,000
(that's 18-1/2 trillion) gallons of kerosene annually*; one would
expect some environmental impact.

Where I come from, 18e9 is 18 billion. I'm amused in sort of an odd way
that everyone keeps saying things like "assuming people can affect the
climate of the earth is the height of arrogance." This usually comes just
before or after they say there isn't enough evidence to decide one way
or the other. Pick a position and stick with it--using both arguments
is a hint that you've made up your mind and you're just spraying a
blinding cloud of rhetoric. My position is that the evidence probably
isn't conclusive, but the consequences are pretty severe, so we'd better
be damned sure we aren't boning ourselves. Perhaps everyone that's
convinced there's nothing to global warming should move to Florida
as a show of faith?

By the way, sorry for the double-quoting. If I weren't such a bad man
I'd have posted once on Newps's and once on Larry's comments....

Mike Beede

"Newps" wrote:
To think that man could change the temp of the earth one way or the
other is the height of arrogance.

You've pulled statements to this effect out of your nether regions and
posted them before, but you've never cited any backup for them. What
are your qualifications as a climatologist?

Larry Dighera wrote:

Would that "opposite" be during the day or night? It also says: "...
nights warmer by trapping the Earth's heat."

Clouds reflect radiation wich results in cooler days and warmer nights.
The question is, what is the total effect (i.e. integrated over 24
hours). The article you cited says, the total effect will be a warmer
climate.

This said, and not having read the original paper, the weak point of
that paper is that it is the result of a singular event and as such, the
results cannot be reproduced. (Actually, they could...)

In general, the impact of clouds to the climate is mathematically very
difficult to model and is one of the last unresolved factors in climatology.

Stefan

On Sun, 12 Dec 2004 17:32:20 +0100, Stefan
wrote in ::

Larry Dighera wrote:

Would that "opposite" be during the day or night? It also says: "...
nights warmer by trapping the Earth's heat."

Clouds reflect radiation wich results in cooler days and warmer nights.
The question is, what is the total effect (i.e. integrated over 24
hours). The article you cited says, the total effect will be a warmer
climate.

That's reasonable. The point is, airline traffic is of such great
magnitude that it is conceivable that it affects earth's environment.

Actually, if that number's written right, it's 18 1/2 BILLION.

mike regish

"Larry Dighera" wrote in message
...

What seems infinitely more significant is the awesome magnitude of
exhaust spewing from airliners as a result of burning 18,536,000,000
(that's 18-1/2 trillion) gallons of kerosene annually*; one would
expect some environmental impact.

* http://www.aopa.org/whatsnew/factcard.pdf

"Michael Calwell" wrote in message
My question is, how much air does an engine
ingest at cruise? How would you visualise that amount of air?

The smaller jet engines are rated for 2000 pounds of thrust. The largest are
rated around 100,000 pounds of thrust. For every action (forcing air through
a jet engine), there is a reaction (thrust). The best visual I know of for
this is to watch, hear, and feel a B-777 do a full-power engine run. It's
awesome.

D.

Another visualization for this...I visited the GE factory last year and
was able to stand inside the inlet of a 777's GE90 engine. That
particular model had a mass flow rate of about 3,000 lb/s. That's as
much air in one second as there was in the building we were in (a large
warehouse). Pretty impressive.

Be afraid. Be very, very afraid :-)

http://www.stop-chemtrails.com/

Hey, don't make fun. These Chemtrails contain large amount of
Dihydrogen Monoxide. Dihydrogen Monoxide is responsible for untold
number of deaths every year!!
Check out http://www.dhmo.org


-Robert (hiding in fear of everything)

I've gradually built up a tolerance to that stuff so that now I can drink it
by the quart and it doesn't even hurt me.

mike regish

"Robert M. Gary" wrote in message
oups.com...
Hey, don't make fun. These Chemtrails contain large amount of
Dihydrogen Monoxide. Dihydrogen Monoxide is responsible for untold
number of deaths every year!!
Check out http://www.dhmo.org


-Robert (hiding in fear of everything)