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Ash from the volcano caused such splendid sunsets that evening sky watching became a popular worldwide pastime. One sky watcher in particular, a Briton named T. W. Backhouse, noticed something odd. He stayed outside after the sun had set and, on some nights, saw wispy filaments glowing electric blue against the black sky. Noctilucent clouds. Scientists of the day figured the clouds were some curious manifestation of volcanic ash.
Eventually the ash settled and the vivid sunsets of Krakatoa faded. Yet the noctilucent clouds remained. "It's puzzling," says Thomas. "Noctilucent clouds have not only persisted, but also spread." A century ago the clouds were confined to latitudes above 50o; you had to go to places like Scandinavia, Russia and Britain to see them. In recent years they have been sighted as far south as Utah and Colorado.
Discussion: A recent fuel sample taken from a DOI aircraft revealed jet fuel
contaminated with an unknown substance, possibly dyed diesel fuel or hydraulic fluid.
The color of the contaminated fuel was described as a lightly tinted red or pink. Jet fuels
meeting industry standards are characterized as either clear or straw yellow colored.
Changes in color from clear or straw yellow are often an indicator of fuel contamination.
Originally posted by Seeker67
These noctilucent clouds are in the mesosphere, which is literally on the edge of space. Could these be a result of chemtrails?
Originally posted by Realtruth
Colored Diesel fuel is really no big deal agricultural diesel is pink or red in color and I know that Jet A is basically diesel so maybe they are using agricultural fuel because it cost much less. Just a thought.
You can Google agricultural diesel color and see what pops up. I think if someone or group was going to put something into the air it would be separate from the fuel source because of the burn temp.
Commercial jet fuel, known as Jet-A, is pure kerosene and has a flashpoint of 120 degrees Fahrenheit (49 degrees Celsius). It is a high-quality fuel, however, and if it fails the purity and other quality tests for use on jet aircraft, it is sold to other ground-based users with less demanding requirements, like railroad engines. Commercial jet fuel as well as military jet fuel often includes anti-freeze to prevent ice buildup inside the fuel tanks
Originally posted by Zaphod58
Actually, Jet A is basically kerosene not diesel.
Originally posted by oldone
here is the link to the photo I was referring to:
Originally posted by oldone
As you can see if the engines were working correctly you should not see the 'smoke'. something else is being introduced to the fuel or somehow into the engines.
Originally posted by blowfishdl
What kind of monsters flag this thread and star this man?? The government is up to all kinds of stuff and your supporting pushing away from the movement??
Watch this:
Video
Are planes much different??
[edit on 24-10-2007 by blowfishdl]
Originally posted by blowfishdl
What kind of monsters flag this thread and star this man??
Originally posted by Tom Bedlam
Originally posted by Seeker67
These noctilucent clouds are in the mesosphere, which is literally on the edge of space. Could these be a result of chemtrails?
The old "implication by question" trick - usually this is used when the poster has no clue.
Could they be the result of the flatus of Harvey the Rabbit?
Could they be due to the consumption of Hebrew National hot dogs?
Could they be a result of discarding old VHS tapes?
Seriously - if you don't have a clue of how one thing might relate to another, but want to speculate, don't. At least don't do this - go invest some time finding out how you want to relate them, if they can be related at all.
Originally posted by Essan
So you find a couple of webpages which give a simple overview of contrails and fail to mention that they can last for hours -
In some cases the contrails can persist for many minutes. But they do slowly diffuse, much like the smoke plume emitted by an acrobatic aircraft
www.sciam.com...
and as a result you think you can dismiss all the hundreds of other references to the contrary;
that it means decades of research is wrong; that all meteorologists are wrong?
Stop being so disingenuous.
The proposed revisions address two categories of particulate matter: fine particles (PM2.5), which are 2.5 micrometers in diameter and smaller; and inhalable coarse particles (PM10-2.5), which are smaller than 10 micrometers in diameter but larger than PM2.5. EPA has had national air quality standards for fine particles since 1997 and for coarse particles 10 micrometers and smaller (PM10) since 1987
EPA last revised the particulate matter standards in 1997. Under terms of a consent decree, EPA agreed to propose whether to revise the particulate matter standards by December 20, 2005; and committed to finalizing any revisions to the standards by September 27, 2006.
Proposal to Revise the National Ambient Air Quality
It will be noted that in October of 1997 a change in the reporting system of visibility data was reduced from a former maximum of 40 miles to a limit of 10 miles. It is a reasonable question to ask as to why that change was made, and whether or not it was made in anticipation of certain events to follow that involve large scale aircraft aerosol operations over large scale geographic regions.
It is observed that there are highly significant degradations in the visibility data immediately following this change in the reporting method. Immediately after this change, the dramatic increase in visibility reports of less than 10 miles is quite apparent.
The graphs shown are taken from climatic archive data available for Santa Fe, NM from Jan 1994 to Mar 2001. Three different time periods are shown to aid in demonstrating the magnitude of change which has occurred in visibility. The first graph shows all data available inclusive from Jan 1994 to Mar 2001. The second graph shows the transition zone during which the visibility standards were altered. This graph showns a period from Jan 1996 to Dec 1998; the change in reporting standard was made in Oct 1997. The third graph shows recent data, where visibility below 10 miles is now a regular occurrence. This graph shows the period from Jan 1999 to Mar 2001.
www.carnicom.com...
Anyway, I found a webpage that says chemtrails are bunk. By your example, they must be bunk
We can predict them pretty well and are continuing research - mainly for military purposes.
(2)(A) The terms `weapon' and `weapons system' mean a device capable of any of the following:
(i) Damaging or destroying an object (whether in outer space, in the atmosphere, or on earth) by--
(B) Such terms include exotic weapons systems such as--
(i) electronic, psychotronic, or information weapons;
(ii) chemtrails;
(iii) high altitude ultra low frequency weapons systems;
(iv) plasma, electromagnetic, sonic, or ultrasonic weapons;
www.fas.org/sgp/congress/2001/hr2977.html
The environmental conditions that favor contrail formation and persistence are not well understood primarily due to the limited number of empirical studies. This study presents an empirical model to predict widespread occurrences of contrails (outbreaks), which was developed from a combination of rawinsonde temperature and GOES water vapor information. Environments containing persisting contrails were first identified on Defense Meteorological Satellite Program satellite imagery for the United States for January and April 1987 and then analyzed in more detail using Advanced Very High Resolution Radiometer (AVHRR) satellite digital data. Adjacent clear and cloudy environments not containing contrails were identified to compare with the conditions favorable for contrail persistence. For this purpose, a predictive logistic model was developed through multiple regression analysis.The model performance was evaluated through goodness-of-fit methods and found to be statistically significant across a range of atmospheric conditions. To further evaluate the model and to demonstrate its application on a real-time basis, predictions of the probability of persisting contrails were made for a case day. Comparisons of the predictions to satellite observations of the existing conditions (using AVHRR data) demonstrate good model performance and suggest the utility of this approach for predicting persisting contrail occurrence.
adsabs.harvard.edu/abs/1997JApMe..36.1211T
B. Contrails and Cirrus
State of the Science
Contrails form if ambient air along the flight track is colder and moister than a threshold based on known thermodynamic parameters. Contrails initially contain more but smaller ice crystals than most cirrus clouds. Early contrail evolution depends, in not well understood ways, on aircraft and engine emission parameters. At times contrails organize themselves in long-lived, regional-scale clusters in ice supersaturated air masses. The radiative effect of contrails is different during the day than at night. Aircraft-induced contrail-cirrus add significantly to the natural high cloud cover and have the potential, albeit with large uncertainties, for a relatively large positive radiative forcing (direct effect). Line-shaped contrails are only a portion of the total climate impact of aviation on the cloudiness.
Recent correlation analyses between real-time regional-scale air traffic movements and the occurrence of contrail structures detectable with satellites, suggest the global coverage of persistent, spreading contrails (contrail-cirrus) and inferred radiative forcing might be underestimated by an order of magnitude or more, but large uncertainties remain.
climate.dot.gov...
One factor still not completely understood is contrail formation. A condensation trail, or contrail, forms in the wake of an airplane as a result of water vapor and aerosol emissions perturbing the local atmosphere when it is at conditions very close to forming a natural cloud. Although it is apparent that aircraft-emitted particles provide sites for water vapor condensation, and that these particles may well participate in initial condensation processes, field measurements demonstrate that contrail ice particles growing on entrained ambient particles begin to dominate in the contrail relatively soon.
www.aiaa.org/aerospace/Article.cfm?issuetocid=14&ArchiveIssueID=5
Contrails are linear cloud features comprised primarily of ice crystals that are produced from the emission of water vapor and particulates from jet aircraft exhaust into ambient air. Contrails form as a result of the relatively warm aircraft exhausts mixing with the cold ambient air of the middle and upper troposphere. Since most aircraft cruise at altitudes of between 10 and 13 km (typically the 300–100-mb layer), the temperature at contrail level is typically -40°C or colder (Beckwith 1972; Gayet et al. 1996). As a result, most water droplets are thought to freeze spontaneously after contrail formation (Pilie and Jiusto 1958; Boin and Levkov 1994). Once a contrail is produced it typically will last only a short time if the ambient humidity is low, and may never be evident from ground level. Only during a unique range of favorable conditions will contrails persist and spread, both horizontally and vertically, producing a cloudlike sky.
Although temperature and moisture are clearly important controls in contrail persistence and growth, the specific ranges of necessary conditions are not well understood.
ams.allenpress.com...(1997)036%3C1211%3AAEMTPW%3E2.0.CO%3B2