Clipmarks | jetcloud's 'contrails' clips

WTKR weather: Clear skies ahead

Fri, 30 May 2008 08:17:27 GMT

clipped by: jetcloud

Meteorologists rely on all kinds of equipment to forecast the weather, from radar and satellites to billion-dollar super computers.

But on days like today, a DC-9 flying overhead can give you a pretty good forecast. Just watch the jet contrails!

We're expecting clear, blue skies today. Chances are the contrails will fade very quickly. That means the upper atmosphere is pretty dry and there aren't any storm systems trying to move our way.

But by tomorrow afternoon, those contrails should start to stick around longer and even thicken up a bit. That means some humid air is pushing in to the region and we can expect some storms this weekend. We'll see how our contrail forecasting holds up.

With those blue skies today, expect high temperatures in the lower 70s.

Expect clear skies tonight with low temperatures in the low-to-mid 50s.

Warmer weather returns tomorrow. Expect plenty of sunshine with high temperatures in the low-to-mid 80s on Friday.

Current weather

Tags: contrails, weather, clouds, climate change

Effects of contrails and ship tracks on climate

Fri, 14 Dec 2007 14:44:14 GMT

clipped by: jetcloud
clipper's remarks: http://jc.stumbleupon.com/

Clip Source: jc.stumbleupon.com

The track of large ships is sometimes visualised by a trail of shallow stratus clouds. These clouds, known as 'ship tracks', form in the wake of ships and are remarkably long-lived (Fig 1). They typically are between 0.5-5 km wide, i.e. wide enough to be seen in visible satellite imagery. Sometimes a ship track appears as a band of enhanced cloud thickness embedded in stratus. Ship tracks are due to cloud condensation nuclei (CCN) in the ship's exhaust (4). They are most likely in a near-saturated environment that is otherwise depleted of CCN. Such environment is very common in the marine boundary layer over the subtropical highs. Over these large, quasi-stationary highs, the boundary-layer air is divergent, making it unlikely to draw in CCN-rich continental air.

The nature and climatic effect of ship tracks was investigated in a field campaign labeled MAST (Monterey Area ShipTrack), which was conducted during June 1994 off the central California coast.

Tags: ship tracks, contrails

Jet traffic affecting climate

Sat, 27 Oct 2007 12:31:05 GMT

clipped by: jetcloud
clipper's remarks: "I remember walking to and from my office [during that time] and thinking how incredibly clear the skies were," recalls Carleton. He mentioned this to a colleague and former Ph.D. student of his, David Travis of the University of Wisconsin, who had noticed the same thing. "Then we started thinking that we should look at the temperature conditions" during those days in September and compare them to years past, Carleton says.

Looking at daytime highs and nighttime lows, Carleton and Travis found the average daily temperature range across the no-fly period to be almost 2 degrees Fahrenheit larger than when jets do fly. This implies, Carleton explains, that contrails lower daytime maximum temperatures and increase nighttime low temperatures—probably in the same way that cirrus clouds do, by blocking some solar radiation from reaching earth's surface during the day, and insulating against heat loss at night.

Since finding this association, Carleton has used contrails as a sort of metr

Clip Source: www.rps.psu.edu

Young (narrow) contrails as well as older ones expand laterally across the sky. Photo by David Travis

Is this atmospheric graffiti a problem? Research by Penn State geography professor Andrew Carleton suggests it could be. Contrails "can extend the natural cirrus cover," Carleton explains, and unlike most clouds, cirrus tend to warm the surface overall because they trap heat more than they reflect the Sun's radiation. "This is a concern to climate scientists because it could mean that a lot more contrails would make global warming worse."

Although scientists had suspected that contrails affect regional temperatures, there was no way to truly test the idea until the tragic attacks on September 11, 2001. In the enforced no-fly period following the collapse of the World Trade Center, air traffic was completely stopped for three days and scientists were able to directly compare temperatures logged in the presence of contrails against temperature data collected with contrail-free skies.

Tags: aircraft, contrails, climate change, global warming

"Must bomb Iran", says US Republican guru

Sat, 27 Oct 2007 05:50:57 GMT

clipped by: jetcloud
clipper's remarks: " Iran threatens 'decisive strike' if US attacks"

Clip Source: www.telegraph.co.uk

A senior foreign policy adviser to the Republican frontrunner Rudy Giuliani has urged that Iran be bombed using cruise missiles and "bunker busters" to set back Teheran’s nuclear programme by at least five years.

Iran threatens 'decisive strike' if US attacks

Analysis: Iran and US in political flux

US elections coverage in full

The tough message at a time of crisis between the United States and Iraq was delivered by Norman Podhoretz, one of the founders of neoconservatism, who has also imparted his stark advice personally to a receptive President George W. Bush.


	Podhoretz is a founder of neoconservatism

"None of the alternatives to military action - negotiations, sanctions, provoking an internal insurrection - can possibly work," said Mr Podhoretz.

"They’re all ways of evading the terrible choice we have to make which is to either let them get the bomb or to bomb them."

In an interview with The Daily Telegraph, Mr Podhoretz said he was certain that bombing raids could be successful.

Tags: aircraft, contrails, military, weapons, bomb, bunker-busting, norman podhoretz, iran, us

Satellite Applications and Research (STAR)

Wed, 24 Oct 2007 02:46:00 GMT

clipped by: jetcloud
clipper's remarks: "STAR supports NESDIS and NOAA in their mission to assess current conditions and predict future changes on the Earth, and to understand long-term changes in the environment."

Clip Source: www.orbit.nesdis.noaa.gov

The Center for Satellite Applications and Research (STAR) is the science arm of the National Environmental Satellite, Data and Information Service (NESDIS), which acquires and manages the nation's operational Earth-observing satellites. NESDIS provides data from these satellites, and conducts research to make that possible.

To transfer satellite observations of the land, atmosphere, ocean, and climate from scientific research and development into routine operations, and to offer state-of-the-art data, products and services to decision-makers.

The United States invests billions of dollars every year in satellites and data, in order to monitor the ever-changing environment of Earth. The Center for Satellite Applications and Research (STAR) uses the data from satellites to offer sound information about the Earth.

STAR is the science arm of the National Environmental Satellite Data and Information Service (NESDIS), which acquires and manages the nation's Earth-observing satellites.

Tags: star, climate change, clouds, cloud-watching, contrails, global warming

Engineer's work may reduce jet travel's role in global warming

Mon, 22 Oct 2007 17:55:54 GMT

clipped by: jetcloud
clipper's remarks: Backed by government and industry grants, Dryer is leading two new research efforts to advance these technologies. The first, a major project funded by the U.S. Air Force, is focused on developing computational and kinetic models that accurately simulate the burning of jet fuel, a complex and poorly characterized mix of chemicals.

Clip Source: www.princeton.edu

Dryer and his MURI collaborators, including Princeton Associate Professor of Mechanical and Aerospace Engineering Yiguang Ju, will develop methods to predict and evaluate how jet fuels will behave in actual engines and characterize the emissions they will produce. While current guidelines specify some overall properties of jet fuels, they do not spell out the actual chemical composition. Depending on the source and processing method, jet fuel typically consists of hundreds to thousands of molecular structures that behave in a variety of ways.

The models developed by the team will represent and characterize the behavior of this broad range of jet fuel species using only a few types of molecular structures as surrogates for the larger whole. Dryer previously developed similar "surrogate fuel" models to represent gasoline, which are now being used for engine design by the automotive industry.

"The composition of fuels changes with the geographic source

the refining process

the season,"

Tags: aircraft, climate change, clouds, contrails, global warming, jetcloud, military, weather modification, worldwide

Simultaneously, Russia and America Conduct Major War Games

Tue, 16 Oct 2007 20:48:55 GMT

clipped by: jetcloud
clipper's remarks: Russian strategic bombers Tu-160, Tu-95 and Tu-22M3, and Il-78 aerial tankers "will conduct flights over the Arctic region, the Atlantic and the Pacific oceans, and the Black Sea, with simulated bombing raids and firing of cruise missiles at testing grounds in northern and southern Russia," Colonel "Alexander Drobyshevsky said." (RIA Novosti).

Part of these Russian war games will be conducted in the Arctic, within proximity of US and Canadian territory (Alaska and Canada's Arctic).
"U.S. and Canadian fighter jets, including F-15s, were dispatched each time to escort the Russian planes in the exercises, which ranged from two to six aircraft,... "

Clip Source: www.globalresearch.ca

The Russian Air Force will be conducting major military exercises over a large part of its territory from the 16th to the 30th of October.

These Russian exercises coincide chronologically with the conduct of major US sponsored war games under Vigilant Shield 08, which are slated to take place from the 15th to the 20th of October.

The US exercise code named Vigilant Shield 2008 (VS-08) is casually presented as an "anti-terrorist drill". While under the joint auspices of the Pentagon and the Department of Defense, US Northern Command in liaison with NORAD is in charge of the operation.

VS-08 includes a massive deployment of the US Air Force and Canada's Air Force. It resembles a war-time scenario with the deployment of bombers and fighter jets over the entire North American continent extending into the Arctic.

In what visibly appears to be a confrontational scenario, the Russian war games commence one day after the launching of the US sponsored VS-08.

Tags: aircraft, canada, contrails, war-games

conspiracy video - chemtrails- contrails

Sat, 13 Oct 2007 01:34:39 GMT

clipped by: jetcloud
clipper's remarks: vid + tunes , may be offensive

Clip Source: forums.randi.org

[Video]

YouTube Video

Tags: aircraft, clouds, climate change, contrails, jetcloud, smoke trail, weather modification

30 Tons vs 429 Tons of Explosives

Fri, 12 Oct 2007 06:01:18 GMT

clipped by: jetcloud
clipper's remarks: Notice the contrails

Clip Source: shock.military.com

Watch as this EOD team detonates 30 tons of explosives and then 429 tons of explosives, side-by-side. (50.25s)

Average Rating:

Tags: your tax dollars at work

Contrails or Chemtrails?

Thu, 11 Oct 2007 20:36:15 GMT

clipped by: jetcloud
clipper's remarks: Looks just like my sky on the west coast. Contrails (Chemtrails?) are the only cloud I see here now - so we really need them. No cloud - no life. And how is your sky?

Clip Source: salonesoterica.wordpress.com

Introduction
If you are unfamiliar with the subject of chemtrails, you should first read this general overview of the chemtrail spraying operations which began in earnest in late 1997. Without first reading the introductory overview, it’s difficult to understand the later informaiton that is being presented here. There are several key points to understand about the chemtrail spraying program.

Most people discover the reality of chemtrails by initially reading about it on the Internet and then going outside and looking up into the sky. They are shocked to realize that what they had been reading about (and studying photographs of) is also taking place right over their heads.

propaganda web sites trying to convince you that ‘everything is well’ and ‘there’s nothing to be alarmed about’ and that unaccountable ‘jet plane exhaust’ plumes are magically being converted into horizon-to-horizon overcasts of “cirrus clouds” !

Clip Source: salonesoterica.wordpress.com

The Chemicals Being Sprayed in Our Skies and Down to Your Lungs Daily

Tags: aircraft, climate change, global warming, clouds, contrails, jetcloud, weather modification

contrail.gi.alaska.edu

Sat, 22 Sep 2007 04:23:33 GMT

clipped by: jetcloud
clipper's remarks: Condensation trails (contrails) formed by aircrafts are sometimes visible from the ground for several
hours. Numerous contrails are formed in the vicinity of main air- traffic routes; due to additional
spreading effects contrails may contribute significantly to the total cloud cover. Continuous
observational methods are used to study the formation of contrails in the subarctic setting of
Fairbanks, Alaska. Since March of 2000 a contrail database has been established, which includes
contrail characteristics, Federal Aviation Administration flight data, and atmospheric measurements
derived from radiosonde ascents at Fairbanks International Airport. The contrail analysis is based on
all-sky digital camera imagery and direct observations of aircrafts.

Daily Overflights for Fairbanks, AK airspace.

Note: Page was updated for the last time by Martin Stuefer, 13.Apr.2006.
The flight data is no longer being updated. However, the flight archive is available.
http://contrail.gi.al

Clip Source: contrail.gi.alaska.edu

On Oct 17th 2003, the United States Air Force conducted manuevers in the Fairbanks area that resulted in many spectacular contrails. The formations of jets ranged in number from 3 to 7 and some examples of the resulting contrails are shown below. Also shown is the output of the UAF Contrail Forecast based on atmospheric sounding measurements at Fairbanks Airport showing the contrail layer for that day.

Click on the image for larger view.
Photos taken October 17, 2003 by Martin Stuefer

Tags: aircraft, arctic, climate, climate change, cloud, contrails, global warming, jetclouds, north pole, spacejunk

Manitoba tornado was strongest ever

Wed, 19 Sep 2007 06:33:38 GMT

clipped by: jetcloud
clipper's remarks: "The tornado prompted the Manitoba government to renew its call for a national severe weather warning system _ one that would send warnings to cellphones, pagers and other personal electronic devices.

The federal and provincial governments have been discussing the issue, although it remains to be seen how much money each level of government would have to provide."

Clip Source: www.ctv.ca

Viewer Sara Tkachyk took this picture of the Elie Tornado from her farm, five miles north of Culross, Manitoba.

Video

CTV Winnipeg: Kevin Armstrong on the record-breaking twister 1:30

WINNIPEG -- It was so strong it sandblasted the bark off trees and tossed homes around as if they were toys.

The tornado that struck the tiny community of Elie, Man., this summer was deemed Tuesday to be the most powerful in Canadian history.

Environment Canada, after reviewing amateur videotape of the twister, determined the tornado packed winds of more than 400 km/h -- strong enough to qualify as Canada's first-ever F-5 tornado on the international Fujita scale.

The tornado touched down on June 22, cutting a swath 300 metres wide and 5.5 km long through the town just west of Winnipeg.

Amazingly, no one was seriously injured or killed, despite the fact that the tornado carried much stronger winds than the F-4 twister that roared through Edmonton in 1987 that claimed 27 lives.

Tags: climate, climate change, cloud, contrails, global warming

September's Science: Shutdown of airlines aided contrail studies

Fri, 14 Sep 2007 15:50:06 GMT

clipped by: jetcloud
clipper's remarks:
Week of May 11, 2002; Vol. 161, No. 19 , p. 291
"Immediately after four hijacked airliners slammed into New York's World Trade Center, the Pentagon, and a field in southwestern Pennsylvania, the Federal Aviation Administration shut down all U.S. commercial air traffic for 3 days. The unprecedented grounding of airliners enabled airports to step up security measures. At the same time, scientists stepped up to a unique opportunity to study the influence of high-flying aircraft on Earth's climate."

Clip Source: www.sciencenews.org

One way that aircraft may affect climate is through their cloud like contrails, which appear behind jets flying at high altitude. Contrails are made of ice crystals that form within seconds around the small particles present in aircraft exhaust

the Pacific Northwest, the Midwest, and the Northeast�areas of the country typically blanketed with aircraft contrails in mid-September�showed the largest changes in diurnal temperature range, mostly from increased daytime high temperatures. This bolsters the argument that contrails can significantly affect climate

Sept. 12, individual cloud trails of high-flying military aircraft stand out clearly in a nearly cloud-free region west of Washington, D.C. In just a few hours, six contrails�each of which started out a few meters wide�spread to cover more than 20,000 square kilometers.

Tags: 9/11, aircraft, climate change, cloud, contrails, jetclouds

IN REMEMBRANCE…

Wed, 12 Sep 2007 05:25:48 GMT

clipped by: jetcloud
clipper's remarks: I too, remember. And that one lone contrail - that one lone cloud over America. Up here in Canada, spaghetti jetclouds.

NoCloud:
http://www.pediascribe.com/sun.jpg

Cloud:
http://www.pediascribe.com/umbrella.jpg

Clip Source: www.pediascribe.com

I remember when I was a kid, my mom was able to recall exactly what she was doing when she heard that JFK had been shot.

And then 9/11 happened. And years have passed. And I can tell you exactly what I was doing when I heard the news.

After

It was late afternoon/early evening at that point. Still not a cloud in the sky. It was very eerie though because there also was not a contrail to be seen. Usually the skies are criss-crossed by them.

Then we saw it. The one lone contrail coming from the west and heading to the east.

To this day we maintain that it was Air Force One carrying President Bush back to the White House. It was about the right time, according to news reports, for it to have been the President’s plane.

And that, my friends, is how I came to understand how my mom could remember minute details about one day in her life. I understand now because I can do the same thing. As much as I want to forget those images burned into my brain, I also never want to forget.

Tags: climate, climate change, contrails, jetclouds, sun, cloud, rain

The Contrail Effect

Sat, 01 Sep 2007 05:06:59 GMT

clipped by: jetcloud

Clip Source: www.pbs.org

Are vapor trails from aircraft influencing the climate, and if so, should we worry?

Contrails, the man-made clouds left in the wake of jet aircraft, may actually alter climate, though to what degree remains unclear.

The sheer number of contrails generated on a typical day in busy air corridors can come as a shock. A NASA satellite took this enhanced infrared image of the southeastern U.S. on January 29, 2004.

In skies normally crosshatched with condensation trails, the only contrails seen in this image from September 12, 2001, were left by the plane returning President Bush to Washington from Nebraska and several escort fighters.

In this true-color satellite image shot above northwestern Europe, the contrast between skies with contrails and those without offers a striking sense of the influence these pseudo clouds might have on regional climate.

The Contrail Effect
Are vapor trails from aircraft influencing the climate?

Discoveries in
Global Dimming

Tags: climate, climate change, global warming, contrails