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Sore Throat
Joined: 01 Sep 2000
Posts: 1802
Location: x |
'Jet trails linked to temperature shifts'
 Fri Aug 09, 2002 1:10 am
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http://www.msnbc.com/news/791321.asp?0dm=C16LT
Jet trails linked to temperature shifts
Halt in air traffic after Sept. 11 allowed closer look at contrails
LONDON, Aug 7 — Clouds formed by trails of water vapor from jet aircraft affect temperatures on the ground, scientists say. Although researchers had suspected the streams of condensation and ice crystals known as contrails had an impact on temperatures, they were not able to test the theory because air traffic over the United States never stopped for any extended period until the Sept. 11 terror attacks.
THE ATTACKS prompted U.S. authorities to ground all commercial aircraft for three days — which allowed researchers to test the impact of contrails.
After analyzing maximum and minimum temperatures over the United States during the grounding period and comparing it with weather records for the same period from 1971 to 2000, they found the change in temperature range was 1.1 degree Celsius, or 2 degrees Fahrenheit, above the 30-year average.
The research, published in Thursday’s issue of the journal Nature, was conducted by Andrew Carleton, a geography professor at Pennsylvania State University; David Travis, a climatologist at the University of Wisconsin at Whitewater; and Ryan Lauritsen, who was an undergraduate at Whitewater when the study was conducted.
“September 11-14, 2001 had the biggest diurnal temperature range of any three-day period for the past 30 years,” Carleton said.
The diurnal temperature range is the difference between the nighttime low temperature and the daytime high temperature, usually for a given day.
Contrails, which can last as long as several hours, alter temperature just like high clouds — they reflect sunlight from above and trap the heat from below.
Without the contrails, the daytime temperature would be slightly higher and the night temperature would be lower, creating the increased range between the lowest and highest temperatures.
The research is reported in Thursday’s issue of the journal Nature.
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Now Nature is a very well respected scientific journal. You just have to wonder about the quality of peer review on this particular article. While not disputing the temperature variance that was observed, it is inconceivable that all such trails are referred to as "ice crystals".
The same story was carried on CNN yesterday evening, complete with a video of a jet spewing intense trails.
At least it's bringing the issue into public attention, and perhaps closer scientific scrutiny.
This rat will be flushed.
[Edited 1 times, lastly by Sore Throat on 08-08-2002] |
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WiseQuakker
Joined: 21 Aug 2000
Posts: 141
Location: Wherever I happen to be at the time |
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Sat Aug 10, 2002 8:19 pm
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Here’s a copy of the CNN online article. Pay very close attention to the next to last paragraph...
http://www.cnn.com/2002/TECH/science/08/07/contrails.climate/index.html
9/11 study: Air traffic affects climate
August 8, 2002 Posted: 1:29 PM EDT (1729 GMT)
By Richard Stenger
CNN
(CNN) -- The thin wisps of condensation that trail jet airliners have a significant influence on the climate, according to scientists who studied U.S. skies during a rare interruption in national air traffic after the September 11 terrorist attacks.
During the three-day commercial flight hiatus, when the artificial clouds known as contrails all but disappeared, the variations in high and low temperatures increased by 1.1 degrees Celsius (2 degrees Fahrenheit) each day, said meteorological researchers.
While the temperature range is significant, whether the jet clouds have a net effect on global warming remains unknown.
"I think what we've shown are that contrails are capable of affecting temperatures," said lead scientist David Travis of the University of Wisconsin, Whitewater. "Which direction, in terms of net heating or cooling, is still up in the air."
In many ways, contrails behave in the same manner as cirrus clouds, thin high-altitude floaters that block out solar energy from above and trap in heat below.
As a result, they help reduce the daily range in daytime highs and nighttime lows. Contrails, by providing additional insulation, further reduce the variability.
With air traffic growing and contrails becoming more prevalent, the natural variation will further decline and could disrupt regional ecosystems, some scientists speculate.
Certain trees, crops and insect species depend on specific daily temperature variations for their survival.
In some ways, contrails differ from their natural brethren. Cirrus clouds let less heat out than in overall, producing a net increase in the Earth's temperatures, according to climate scientists. With contrail clouds, they said they are not so sure.
"Contrails are denser and block sunlight much more than natural cirrus clouds," said Travis, who conducted the study with Andrew Carleton of Penn State University in University Park, Pennsylvania. They reported the findings this week in the journal Nature.
"And contrails are much more prevalent when the sun is out," he said. "When this is factored in, there is a possibility that they offset global warming, and this is what we are trying to determine now."
The researchers plan more studies to tackle that question, but they said they expect to rely on circumstantial evidence only.
"We can only hope that the September 11 tragedy never happens again," Travis said.
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The debunkers had better get on this one right away and set these folks straight on how “real” scientists do things...
_____________________________
“We should be on our guard not to overestimate science and scientific methods when it is a question of human problems and we should not assume that experts are the only ones who have a right to express themselves on questions affecting the organisation of society.” — Albert Einstein, May 1949......
edited for formatting only
[Edited 2 times, lastly by WiseQuakker on 08-10-2002] |
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Catnip57
Joined: 22 Apr 2001
Posts: 596
Location: Central Washington |
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Sat Aug 10, 2002 9:53 pm
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We had a similar article appear yesterday in our local newspaper .... not on the front page but on page 3 which guaranteed that it would at least be seen by most people. I applaud the newspapers for posting this since at least it gives the chemtrail issue a little more visibility in the public eye. .....
But there were a couple of things that were starting to bother me about this article so I decided to go back to some of the archives in this forum and this is where I'm really glad that Thermit has designed this place to keep postings archived from since the beginnings. I've listed some interesting observations from what some of us noticed here on the day after 9/11. From what I've read and remember, there were still a lot of trails visible in the sky after all the commercial airlines were grounded. Which leads me to question the news about this study that was done for the three days that planes were suppose to be grounded.
If there was such an opportunity for this study to be carried out wouldn't their results be a bit skewed since they still had military planes in the air leaving trails and some folks were seeing trails to the point they commented it was "business as usual"? Another question I have... how did they get all their equipment together to do a study like this during a time of national crisis when everyone was wondering what's going to happen next? Did they plan this study in advance for just such an occasion? Who gave the authorization for this study to take place... just who was it that was so interested in finding out the answers? Well... maybe I ask too many questions here... just something I've been thinking about.
A thought for the conspiracy theorists among us... Is it possible that TPTB are trying to divert attention away from who is actually doing the spraying by pinpointing the blame onto the commercial airlines?
Here's the link to that particular post and a few quotes by the posters following. http://www.chemtrailcentral.com/ubb/Forum1/HTML/000877.html
Sore throat: 9/11/01
Today there was certainly a monumental loss of innocent lives in America, and inevitably it will bring a change of life as we knew it.
The grounding of all COMMERCIAL aircraft is absolutely unprecedented.
For those concerned about the spraying of our skies, this unique situation affords an opportunity for careful observation. Now would be an excellent time for all those concerned to meticulously record their observations on the inevitable return of white skies. Couple your observations with atmospheric soundings - Skew-T diagrams - to establish whether physical conditions are appropriate for persistent trails.
In the memory of those who have died, perhaps we will be able to gain insight on a particularly insidious form of domestic terrorism.
Ellyn: 9/12/01
Spokane, Washington and the vast surrounding area was heavily sprayed yesterday. Today I observed a thick chemtrail-created haze and numerous chemtrail-created clouds, but no jet aircraft. Spokane was sprayed very heavily last week also.
I'd like to make a note that although I post my chemtrail observations from the Spokane area and therefore often speak of the heavy spraying in Spokane, the actual area being sprayed is extremely broad.
Afraidofsunlight: 9/12/01
Hello,
The dust and chem-flake's are so visible at certain time's of the day that you don't need shade's.Early morning and late afternoon.Dieing tree's placed between yourself and the chem-sun are a great backdrop.
Toilet bowl ring-round the horizen.The sprayer's were out before dawn,stop and start.They left us a lovely X right over Baltimore.Lot's of small chemtrail's.By late afternoon the magic cloud's had appeared.They are melting as I write this.
Roman: 9/12/01
I seen the first chemtrail at 9AM this morning,It was one of those west to eastlong wide dripping kind.It quickly spred and remained most of the morning. By noon it was business as usual over the valley.Tonight we have the normal chem dome. Yesterday I seen no trails at all . roman...
David: 9/12/01
Northern Calif/Lake Co...... Blue skies here are quickly disappearing this a.m. Being replaced with thin wispy, dripping "clouds" all in rows and filling the sky. They are forming over our county and being blown towards the Sacramento Valley. No planes heard or visible. HAARP
Delphi: 9/12/01
Pen, HAARP WAS turned on yesterday to maximum power at 3:15 PM PDT...at 6.965MHz Pulses 6.25 with dual pre-tones with short 15 second pauses. There was particulate matter, strands, and wispy formations and dirty, chem style cloud remnants in NW Louisiana. Additionally,my colleague may have on photos, "some" type of craft making individual circles of spray patterns in afternoon. Blessings, Joanne 
Catnip: 9/12/01
I think one thing that can be ruled out is the hypothesis that the chemtrails are being created by increased air traffic or even commercial airlines since all of us know that these last two days there have been no commercial air traffic flying due to the terrorist attacks.
From what I hear the airliners are still waiting to hear when they can get back to business so this is an ideal time for us observant folks to gather in as much information we can as to the identity of the sprayers.
Top Gun: 9/12/01
I'll tell you what was flying, CatNip-
F-16s, F-15s, AWACS, KC-135's, and KC-10s. That's pretty much about it. The military has owned the airspace over the USA since a few hours after the attack.
We (that includes me) have been flying in combat air patrols over the skies of the USA since a few hours after the attacks. We've been sitting on alert at the end of many runways in this country, just in case if anyone else gets any stupid ideas. I've been privy to enough info in the last 24 hours to know that we are doing the right thing.
Lulu: 9/13/01
The afternoon of the 11th I photographed "spinal" clouds, the kind of clouds that chemtrails morph into on occassion. Yesterday nice blue sky day. Today many trails up there lingering and turning sky to haze. Business as usual. Up until a few days before the terrorist attacks there were virtual no trails to speak of. A few days before the 11th many lingering trails noted even though every altitude RH reading was 40% or less.
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contrails
Joined: 10 Aug 2002
Posts: 2
Location: Pismo Beach, California |
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Sun Aug 11, 2002 1:40 am
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The skies were filled with military aircraft throughout the time that commercial flights were suspended after 9/11. Contrail activity is what you observed, nothing more...nothing less. |
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Thermit
Joined: 08 Jul 2000
Posts: 3136
Location: Texas |
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Sun Aug 11, 2002 2:02 am
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Wow, Elvis Lives!
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Lulu
Joined: 22 Dec 2000
Posts: 2501
Location: right here |
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Mon Aug 12, 2002 3:59 am
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Zat you tick boy? How's the tick-bitten sister doing?
Seems to be several articles coming out regarding contrails and global warming. I just posted one in Ecology compliments of father~ http://www.chemtrailcentral.com/ubb/Forum22/HTML/000020.html |
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contrails
Joined: 10 Aug 2002
Posts: 2
Location: Pismo Beach, California |
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Thu Aug 15, 2002 6:17 pm
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I see you are all still beating a dead horse to death. Some things never change.....lol |
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Deborah
Joined: 30 Jul 2000
Posts: 731
Location: East Coast |
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Tue Aug 20, 2002 4:39 am
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"contrails" wrote:
.....Contrail activity is what you observed, nothing more...nothing less.....
OK. So let's just say, for purposes of absolute clarification here, that this *contrail activity* to which you refer is just that - period - as you so emphatically state.
I infer from this that you would not therefore think that this *contrail activity*, to which you very specifically refer, is becoming a bit of an issue, if, in FACT, said activity is what people in many regions are observing to be spreading out and completely OBLITERATING blue sky over their regions day after day after day, up to 25 DAYS PER MONTH this summer.
In other words, if the sky-obliterating MESS people are witnessing daily over their heads is EXCLUSIVELY the result of *contrail activity - nothing more, nothing less* - then people should not be concerned that the appearance of our skies is being completely TRANSFORMED by this *activity*. Because it's only *contrails*.
Is this what you are implying? Or are you going to dodge the question here like so many others of your orientation to this matter?
I'm asking a very straight question. I'd really like a straight answer - for once. |
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Sky of Gray
Joined: 17 Aug 2002
Posts: 4
Location: Logan, Ut |
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Tue Aug 20, 2002 5:01 am
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I agree Deborah. These are not condensation trails to the dismay of Contrail and others that think they are. A condesation trail dose not spread and fall to the earth leaving a white haze to blanket all of creation. It never has in the past and never will. |
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Deborah
Joined: 30 Jul 2000
Posts: 731
Location: East Coast |
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Sun Aug 25, 2002 4:36 am
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Re: Posts by Deborah and Sky of Gray, dated 8/19/02:
What - no takers? |
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Deborah
Joined: 30 Jul 2000
Posts: 731
Location: East Coast |
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Sun Aug 25, 2002 3:45 pm
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Re: Posts by Deborah and Sky of Gray, dated 8/19/02:
Still no takers, I see.
The silence is deafening. |
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canex
Joined: 26 Oct 2000
Posts: 164
Location: USA |
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Mon Aug 26, 2002 2:16 am
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Hey, listen up. Sure, they are contrails, nothing more. Contrails spread and fill up the sky. No, they do not cover the earth with any white substance or anything else. No one in this forum or anywhere else has provided any sort of proof connecting what happens at 30,000 ft with any substance on the ground. Nor will they be able to because it ain't happening. |
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PacerLJ35
Joined: 18 Apr 2002
Posts: 456
Location: Millbrook, AL, USA |
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Mon Aug 26, 2002 2:13 pm
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I have always agreed with the assessment that contrails do affect the Earth's climate to a small degree by creating clouds, which are effectively what contrails are.
"These are not condensation trails to the dismay of Contrail and others that think they are. A condesation trail dose not spread and fall to the earth leaving a white haze to blanket all of creation. It never has in the past and never will"
OK, Mr. Contrailologist. Here's what every commercial pilot will tell you. Contrails do spread. They often spread up to 4-5 times wider than the aircraft that left the contrail, and under the right circumstances, they will even "feed" cirrus clouds.
One thing they will NOT agree with you is the notion that there has EVER been any "white haze" falling from the sky and blanketing anything. Every contrail (thick, thin, irregular, doesn't mater) that I've flown past, through or over/under has never had anything "falling" from it. In fact, it looks just like any other cloud except it's long and skinny. |
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Deborah
Joined: 30 Jul 2000
Posts: 731
Location: East Coast |
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Tue Aug 27, 2002 12:56 pm
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.....Contrail activity is what you observed, nothing more...nothing less.....
OK. So let's just say, for purposes of absolute clarification here, that this *contrail activity* to which you refer is just that - period - as you so emphatically state.
I infer from this that you would not therefore think that this *contrail activity*, to which you very specifically refer, is becoming a bit of an issue, if, in FACT, said activity is what people in many regions are observing to be spreading out and completely OBLITERATING blue sky over their regions day after day after day, up to 25 DAYS PER MONTH this summer.
In other words, if the sky-obliterating MESS people are witnessing daily over their heads is EXCLUSIVELY the result of *contrail activity - nothing more, nothing less* - then people should not be concerned that the appearance of our skies is being completely TRANSFORMED by this *activity*. Because it's only *contrails*.
Is this what you are implying? Or are you going to dodge the question here like so many others of your orientation to this matter?
I'm asking a very straight question. I'd really like a straight answer - for once.
The question is:
It is __OK__ that our skies are, at this point, virtually obliterated, day after day after day, by the results of *persistent, spreading contrail activity*, right? There is __no problem__ with that, right?
Please answer, directly, this one question. I don't think that's too much to ask.
Thank you. |
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eyesopen
Joined: 25 Apr 2001
Posts: 663
Location: Nashville TN |
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Tue Aug 27, 2002 2:57 pm
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Excellent observation Deborah. How come these days the "just contrails" take over the sky and form huge cloud masses more days than not?
From yesterday's "just contrails":
Old trails line up and form large cloud. There are many trails merging together in this shot:
This little area was built up by "just contrails" until it joined the main cloud mass near it:
Deborah is right. The sky here is dominated by "just contrails" most of the time. |
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