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Airplanes Cause Accidental Cloud Seeding
An anonymous reader writes "A new study by a team of U.S. researchers found that commercial and private jetliners may be contributing to a form of accidental cloud seeding. When an airplane flies through a cloud, its propellers cause the expansion and cooling of the air behind them which can cause water droplets to spontaneously cool and crystals to form. The aircraft sets off a chain reaction in the cloud that can continue on for hours after the plane has passed by. The researchers also discovered that this phenomenon is more common near the poles, where many of Earth's weather monitoring systems are, and it could be skewing data that research teams are gathering in those areas."
Now you're into the time slip...
Meteorologists have known about this for some time. They tend to form what is known as "Hole Punch" clouds.
Examples: http://bit.ly/lAxNQO
If our elected representatives no longer represent us, do we still live in a Democracy?
I mean seriously, this has been known for decades. There was even a study that looked at the 9-11 shutdown of air-traffic affected climate.
This has been known for a long time.
Next week when we come by for Slash Dot Mystery Time, can we talk about how steam valves and clock gears work?
That would also be a slide in the ice-house.
...chemtrail. And before anyone gets in a tizzy about the chemtrail topic, weather its real or not.... its not only real but mentioned in weather modification and other paperwork from the US government. This makes the topic of accidental cloud seeding pretty much a non-topic.
Please quit wasting our tax money, seriously the people who did this study should have their funding removed as all they have done is have a "no shit mr 1934" moment over technology that is darn near extinct
Jetliners do not have propellers. ;)
This message was scanned by European governments and contains no terrorism.
Before the 2010 airplane crash that killed Polish president several top generals and tens of top politician, a mystery fog appeared. Could the fog be intentionally formed the Russian airplane that was flying around that place earlier?
3 2. 1......
surely someone out there will be using this as more "proof"
"commercial and private jetliners" "When an airplane flies through a cloud, its propellers"
The number of jetliners with "propellers" is mighty fucking few, though not zero.
Linking to the PARENT Science Daily piece
http://www.sciencedaily.com/releases/2011/06/110630142835.htm
instead of the pointless Inhabitat bullshit summary would have been nice. There is NO excuse for the Inhabitat link other than SPAM.
AC is anonymous because he/she/it wants page hits for Inhabitat.
Now I know not to visit Inhabitat again. Fuck you too and thanks for nothing.
http://www.sciencedaily.com/releases/2011/06/110630142835.htm
"This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
I am also prone to seeding around the pole.
Could we possibly not appropriate these results into the militant anti-human greeny litany and then beat ourselves over the head with it? It's such a drag.
This is a human planet. For whatever reason the universe permitted the emergence of a species of engineers. Barring our extinction the planet will never again approach 'natural.' From radioisotope traces to atmospheric disruption the effect of our existence can not be prevented, removed or even hidden.
Contemporary Western culture is presently indulging a crippling self-loathing as it attempts to come to terms with this reality. Yurts aren't an option. Stop polluting your mind with that nonsense.
Fortunately cultures evolve, sometimes rapidly. A day will come when we cease to relegate all analysis of new knowledge of our world and everything in it exclusively to anti-humanists.
Or it was just a fog.
http://en.wikipedia.org/wiki/Fog#Characteristics
Fog forms when the difference between temperature and dew point is generally less than 2.5 C or 4 F
"Fog can form suddenly, and can dissipate just as rapidly, depending what side of the dew point the temperature is on. This phenomenon is known as flash fog."
I remember reading this at a popular news site over a year ago. Where could it have been? Oh, wait, here it is! http://science.slashdot.org/story/10/06/15/2020240/Airplanes-Unexpectedly-Modify-Weather
Meteorologists have known about this for some time.
The common term for it is "contrails."
Yes, it's well known that contrails sometimes to grow into cloud cover. (High altitude thin clouds, not puffy cumulus ones). This is not news.
http://www.geoffreylandis.com
...of this? I used to wonder about this as a kid at least 15-ish years ago. Even without the stuff about propellers and pressure and such, it seemed obvious that a plane flying through a cloud would set off a reaction from the larger water drops formed from the condensation buildup on the body of it. Said larger drops fall off and through the cloud further causing a reaction.
Of course I never studied it or took it further, so it is quite possible I am wrong, but the point stands that I thought of it long ago, why is it only news now? Surely I am not the only one to think of it?
Just saying saying that some can say the plane cloud seeding spawned a tornado that killed some one / damaged your car / house / other stuff.
This almost sounds like a lead in for "scientific excuses" for chemtrails.
Oh, look, its the turbo-props causing the lasting contrail, those jets are not equipped with special sprayers at all.
How amazed would you be to suddenly find that you just forgot what I wrote and you needed to reread my post.... again.
Yeah, those private jets over the poles, why DO THEY DO IT??? Stop private planes flying over the poles. All zero of them.
And as others have mentioned, yeah "propellers" on the "jetliners". LOL! Sure.
I would rather blame rich guys with long noses who were originally made of wood.
Sure, it's Pinnochio. Just as real.
Looks like Slashdot let another potsmoker start a thread.
E
Oddly enough I made this time lapse with my phone the other day, see jet fly through on the left. http://youtu.be/2VBx1RHFM3c
The question i always have, and never get the answer to, when I see articles about these "studies" is: explain droughts in California over the past 30 years. California has a whole lot of air traffic all over the state and yet it goes multiple years on end with very little rain. If this happens so consistently to conclude there's a correlation why does California have droughts...like ever...?
"UNIX is very simple, it just needs a genius to understand its simplicity." -Dennis Ritchie
Mystery? What exactly was mysterious about it? Are all fogs mystery fogs?
Finally! A year of moderation! Ready for 2019?
This is actually not about contrails, but quite the opposite. A contrail is a cloud created by the passage of an airplane (due to the vapor from the engine or simply the dynamic effect of stirring up oversaturated air). This study is about airplanes flying through clouds and causing those clouds to start raining. In a way, they are erasing clouds ("punching holes" in them)
We run up into the sky so deep, it be crying. Yeah, you thought that was rain. http://www.youtube.com/watch?v=IU7VTJA0dNo
Up, Up, Down, Down, Left, Right, Left, Right, B, A, START
FTFA "When an airplane flies through a cloud, its propellers cause the expansion and cooling of the air behind them which can cause water droplets to spontaneously cool and crystals to form." However the picture shows a jet aircraft which if very different from a plane that has a standard propeller on the front. If the study took into account the differences between the two types of aircraft I'm reasonably sure that the effect would be different. Ergo there is a significant difference between a standard prop an a jet engine and the author of the article should have noted that. And will these scientists stop "rediscovering" that which has been known for years.
"We are just a war away from Amerikastan. When god vs god the undoing of man." Dave Mustaine
http://www.infashion2011.com/
interesting. noctilucent clouds have also been on the rise during the period of modern aircraft, and are also seen primarily towards polar latitudes.
I'm in the habit of inspecting the URL shown in the status bar before clicking on a hyperlink. Do you have any particular reason to hide this useful information?
Contrails, which are extensive over some states such as Oregon where they can spread to cover the sky all day, decrease crop yields, because crop yields respond to the amount of solar energy received. You can see the response of crop yields to solar energy if you plant you garden against shade: in the shaded garden you will see noticeably less growth and productivity. Aviation does reduce farm productivity as a result.
There's only one comment on the source website (and I'm not minded to sign up to the site to comment there) :
lazyreader says:
Would that be so much of a problem in drought prone areas?
Which is a perfectly good question, but begs the follow-up question of "what about the marginal or drought-prone areas downwind of your seeded area, where your seeding accidentally or deliberately wrings the water out of the clouds, so these areas get tipped into full-blown drought?"
I'm also somewhat minded of the climate research done in mid-September 2011, which showed that the US is probably cooled by around 1deg C (1 K) by it's normal shroud of contrails. (Travis, D.J.; A. Carleton and R.G. Lauritsen (8 2002). "Contrails reduce daily temperature range". Nature 418 (6898): 601. doi:10.1038/418601a. PMID 12167846.)
Birds are not dinosaur descendants;birds are dinosaurs, for all useful meanings of "birds", "are" and "dinosaurs"
"The cloud mystery" and "global dimming" paint a good picture of whats going on.