Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Earth Warmed by Trails of Clouds that Jets Leave Behind (Contrails)
LiveScience.com ^ | 3/29/11 | Wynne Parry

Posted on 03/29/2011 9:40:47 PM PDT by NormsRevenge

The long, feathery lines of condensation that form behind aircraft, called contrails, have more of an immediate warming effect on the Earth's surface than the carbon dioxide or other greenhouse gases that the aircraft emit, a new study calculates.

However, the researchers add, contrail clouds disappear within a day or two; the potent greenhouse gas carbon dioxide lingers in the air for many years.

Contrails form when the hot, moist plume of exhaust generated by an airplane's engines mixes with cold air in the upper atmosphere. Liquid droplets form and then freeze, forming a straight, white line. Over the span of a few hours or more, the contrail loses its definition and becomes a wispy cirrus cloud. But if the atmosphere is very moist, the line shape can exist for days, said Ulrike Burkhardt, a researcher at the Institute for Atmospheric Physics ..

If there were no other clouds in the sky, contrail cirrus clouds would cover up to 10 percent of European skies and about 6 percent over the east coast of North America, another heavily trafficked region, they calculated. They disappeared from American skies briefly when nearly all airtraffic was grounded after the 9-11 attack. Some research has indicated that this resulted in more variation in temperatures, particularly warmer daytime temperatures.

...

Contrail clouds have another complex effect: They use up water vapor that normally could go into the formation of natural cirrus clouds, according to Kärcher and Burkhardt.

When all of these effects are considered, contrail clouds ultimately alter the Earth's energy budget in a way that warms it, by reducing the amount of energy that escapes back out into space, the team found. Greenhouse gases do the same thing, trapping energy that would otherwise escape into space and so warming the planet.

...

(Excerpt) Read more at livescience.com ...


TOPICS: Chit/Chat; Outdoors; Science
KEYWORDS: clouds; contrails; earth; greenhousegases; trails

1 posted on 03/29/2011 9:40:50 PM PDT by NormsRevenge
[ Post Reply | Private Reply | View Replies]

To: NormsRevenge
Well that does it, ground all airplanes of all types immediately and they can no longer fly. No commercial, no governmental, except of course the Obama’s need Vacation One to fly them around, and all military flights. Do away with all cars. Get rid of the cows farting; no coal fires, no wood burning, no oil burning stoves. Then the air will be clean, we will freeze to death, thus culling the population and all will be rosy.
2 posted on 03/29/2011 9:47:01 PM PDT by RetiredArmy (The Lord Said It and I Believe it. Read your Bible. These are the end time events.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

What about the effect of water vapor emitted by trees and other vegetation?


3 posted on 03/29/2011 9:48:51 PM PDT by Moonman62 (Half of all Americans are above average. Politicians come from the other half.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

Ban lightning....


4 posted on 03/29/2011 9:57:56 PM PDT by Squantos (Be polite. Be professional. But have a plan to kill everyone you meet)
[ Post Reply | Private Reply | To 1 | View Replies]

To: RetiredArmy

Nuke the gay whales for Islam !

Bunny huggers are money huggers seeking more junk science research funds.

My opinion.....stay safe.


5 posted on 03/29/2011 10:01:06 PM PDT by Squantos (Be polite. Be professional. But have a plan to kill everyone you meet)
[ Post Reply | Private Reply | To 2 | View Replies]

To: NormsRevenge
Ridiculous. Incidentally, I'm a bit confused by the following sentence:

"They disappeared from American skies briefly when nearly all airtraffic was grounded after the 9-11 attack. Some research has indicated that this resulted in more variation in temperatures, particularly warmer daytime temperatures."

So the presence of contrails results in global warming, but following 9/11, when they disappeared briefly (and for a statistically insignificant period), it resulted in higher daytime temperatures? Am I missing something?

6 posted on 03/29/2011 10:01:13 PM PDT by americanophile ("this absurd theology of an immoral Bedouin, is a rotting corpse which poisons our lives"-Ataturk)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

Jet trails warm the earth? We ought to be able to think of a more efficient, less expensive way to heat the place than that.


7 posted on 03/29/2011 10:06:33 PM PDT by Migraine (Diversity is great... ...until it happens to YOU.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

Are we going to die again?


8 posted on 03/29/2011 10:07:35 PM PDT by PistolPaknMama
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge
I think this article deserves one of these...


9 posted on 03/29/2011 10:08:34 PM PDT by smokingfrog ( sleep with one eye open ( <o> ---)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

Carbon dioxide is in no way “potent”: in the real world as opposed to computer simulations, it has no effect whatsoever on air temperature, and that absence of causal relationship can be verified over millions of years in the past.


10 posted on 03/29/2011 10:17:46 PM PDT by Vincent Jappi (I love cats. Meeow!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

Carbon dioxide is in no way “potent”: in the real world as opposed to computer simulations, it has no effect whatsoever on air temperature, and that absence of causal relationship can be verified over millions of years in the past.


11 posted on 03/29/2011 10:18:01 PM PDT by Vincent Jappi (I love cats. Meeow!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge
Looks like someone is pathetically trying to regain some degree of intellectual authority without the qualitative proof...

Do they still call it "climate change," or is there a new verbal sophistry?

12 posted on 03/29/2011 10:26:34 PM PDT by jonascord (The Drug War Rapes the Constitution.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: smokingfrog

"But know this, that in the last days perilous times will come: for men will be lovers of themselves, lovers of money, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy, unloving, unforgiving, slanderers, without self-control, brutal, despisers of good, traitors, headstrong, haughty, lovers of pleasure rather than lovers of God, having a form of godliness but denying its power. And from such people turn away, for his name is Obama."

13 posted on 03/29/2011 10:33:19 PM PDT by Viking2002 (RELEASE THE KRAKEN!!!!!!)
[ Post Reply | Private Reply | To 9 | View Replies]

To: NormsRevenge

And a new “scientific” study I heard about the other day “proves” that standing on one leg for an hour every other Tuesday at 3am, with tinfoil on your head, will result in 1 inch higher tides in Indonesia as well as a 25% increase in the Ladybug population. Go figure.


14 posted on 03/29/2011 10:34:46 PM PDT by MCH
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

What A Load! Where’s the Barf Alert?


15 posted on 03/29/2011 10:56:40 PM PDT by buccaneer81 (ECOMCON)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

LOL

That was funny.


16 posted on 03/29/2011 11:06:16 PM PDT by Vendome ("Don't take life so seriously... You'll never live through it anyway")
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge
They use up water vapor that normally could go into the formation of natural cirrus clouds

Say what?

17 posted on 03/29/2011 11:22:22 PM PDT by hattend (Obama got his 3am call about Egypt. The call went right to the answering machine.- Sarah Palin)
[ Post Reply | Private Reply | To 1 | View Replies]

To: hattend
Yeah, you know. As opposed to the fake cirrus clouds.

George Noory should have this guy on CTC.

18 posted on 03/29/2011 11:41:54 PM PDT by smokingfrog ( sleep with one eye open ( <o> ---)
[ Post Reply | Private Reply | To 17 | View Replies]

To: NormsRevenge

19 posted on 03/30/2011 1:01:08 AM PDT by The Magical Mischief Tour (With The Resistance...)
[ Post Reply | Private Reply | To 1 | View Replies]

To: The Magical Mischief Tour

You are thinking of Chemtrails and not Contrails. Here is a little video of Chemtrails

http://www.youtube.com/watch?v=bSSWnXQsgOU


20 posted on 03/30/2011 1:15:12 AM PDT by Sprite518
[ Post Reply | Private Reply | To 19 | View Replies]

To: americanophile

Ever notice it is only the sky above the head of the idiot making such a claim as the 911 deal? Whether a jet leaves a contrail has more to do with the amount of moisture in the air than anything else, but when there is no flying at all, such a brilliant mind. If any reasoned researcher would notice, especially on very dry and cold days, a jet may leave a small contrail behind it. Often when one really looks at it, a long contrail is usually broken for spans with no contrail because of the pockets of dry air it is flying through.

If they really want an education on how non-homogeneous our atmosphere really is at low levels, have a hot air balloonist explain it to you.


21 posted on 03/30/2011 3:38:50 AM PDT by mazda77 (Mike Hogan - JAX Mayor)
[ Post Reply | Private Reply | To 6 | View Replies]

To: smokingfrog

Or maybe a retake on the old Johnny Cash song, “How high is the water Ma” -

How high is the b.s. Ma? Knee high and rising.


22 posted on 03/30/2011 4:19:04 AM PDT by hfr (Science in the service of idiology (intentional))
[ Post Reply | Private Reply | To 9 | View Replies]

To: NormsRevenge

More Junk Science foisted by fools with advanced degrees.
It is true that the vapors prevent loss of ground heat into space by reflecting the heat back to the ground, but it is also true that it will have no real effect on the climate. It’s a lot like pouring water on the sidewalk during a rain storm. The sidewalk isn’t any wetter either way.


23 posted on 03/30/2011 4:31:45 AM PDT by BuffaloJack (Obama did not learn incompetence; he was born to it.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge
What about Chinese missile trails?


24 posted on 03/30/2011 5:38:28 AM PDT by JRios1968 (Laz would hit it!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: americanophile
So the presence of contrails results in global warming, but following 9/11, when they disappeared briefly (and for a statistically insignificant period), it resulted in higher daytime temperatures? Am I missing something?

Global warming causes cooling. Duh.
/s

25 posted on 03/30/2011 6:24:54 AM PDT by al_c (http://www.blowoutcongress.com)
[ Post Reply | Private Reply | To 6 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson