NBC - Contrails can change the weather

A classic 1980 news report on how contrails create cloud cover.

Aired on 12/30/1980

This is the research referenced:
http://www.isws.illinois.edu/pubdoc/CR/ISWSCR-236.pdf



Transcript:

Clouded Judgment: Do Jet Contrails Increase Cloud Cover?

JOHN CHANCELLOR, anchor:

On clear days, you can often see long white lines being traced high in the sky. They are contrails of jet aircraft. They're actually long, slender clouds. Other men are finding them especially fascinating because the theory is being developed that those long, white lines may be changing our weather for the better. Details from Roger O'Neil.

ROGER O'NEIL, reporting:

The exhaust from jet engines, usually seen as long, thin trails of white clouds behind high-flying jet airplanes, may be a big reason why there are 30 fewer days of sunshine a year in the Midwest now than there were in 1900. The daily range between high and low temperatures has also narrowed. Weather researchers, studying cloud cover in 10 Midwestern states, found a sharp increase in cloudiness with the increase in commercial jet travel, particularly in the main East-West jet corridor, there were even more clouds. A jet produces a contrail or cloud because its exhaust consists primarily of water vapor.

RICHARD SEMONIN (Illinois Institute of Natural Resources): In the absence of natural clouds, given the correct atmospheric condition, jet aircraft in high frequency can almost completely cover the atmosphere, visible atmosphere, with clouds.

O'NEIL: Semonin says, unlike most changes in the atmosphere caused by man, this one is beneficial. Clouds help farmers in the Midwest by blocking the sun. Temperature extremes can damage plants and speed up the evaporation of soil moisture. In the Winter, city people benefit because clouds act as a blanket, preventing warm air from escaping into the atmosphere. No one is trying to make clouds now using jet engines, but this study suggests that jet travel is inadvertently making our days more cloudy and some day, weather researchers may be able to use jets on purpose to change our weather. Roger O'Neil, NBC News, Champaign, Illinois.

Category:

Film & Animation

Tags:

• Contrail
• clouds
• geoengineering
• chemtrails

[inspirednow2]

Yep! Champaign, IL. That's my town. Two hours ago, we actually had semi-blue skies. As I type, I can see several jets spraying; it's 9:00a and the sky is already hazy. Weather control my ass. More like people control.

[GregOrca]

@ayerjake

Jake, sounds like you are describing a holding pattern:

contrailscience . com/racetrack-contrails/

en . wikipedia . org/wiki/Holding_(aviation)

[PaulRubino]

WHere did you get this video clip? This is great.

[jaworskij]

@1:03 - That's Orville Redinbacher.

[xlla]

AHhhhhhhhh,... Gotta to love the 80's

[ayerjake]

My brother thought I was looseing it for a couple years trying to explain the chemtrail reality. Right up until he watched 2 different jets leaveing trails in one direction turn around not leave a trail and return leaving a trail again , in the same area for about half an hour. He looked as though he was watching a ghost. OPEN YOUR OWN EYES PEOPLE.

[ayerjake]

Instead of listening to conjecture. Watch the sky as you sit in traffic,drive to work, have a coffee break. I have witnessed several times that large commercial like jets go back and forth over the same area only leaving a "trail" going in one direction. Not more than 10 or 15 minutes later, another came and resumed the same pattern. I suppose these were pilots out having fun burning off spare fuel. YOU CAN SEE THIS FOR YOURSELVES PEOPLE.

[daster9]

The clips they show are indeed contrails, trailing the aircraft and disappearing at a constant rate.I live in southern CA and the Chemtrails are terrible. We will have 5 days of 80* and sunny and the sky totally clear one day and riddled with Chemtrails the next. No change in anything. I have seen them have a start and stop, form s curves, and after a hard day of spraying the moon had a ring around and you could see the haze at midnight, and I have seen the at night as well.

[LibertyTreeBud]

Have a nice day, pal.

[GregOrca]

@LibertyTreeBud

"we all can see the real contrails of the 1980's"

Yes, like these:

contrailscience . com/contrail-photos-through-hi­story/