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Originally posted by Aloysius the Gaul
Originally posted by MathiasAndrew
reply to post by Phage
I posted that because that is the study done by Dr Jim Haywood and others that involved the circular clouds. The study will never say the sent a plane out to make fake clouds so we can study them. Of course it is going to say the standard lines used by all the agencies involved..
Why?
If someone created contrails in order to study them there would be no reason to hide it, since "they" say contrails are nothing sinister. Indeed any paper that tried to hide it and got found out would be seriously discredited, so it would be totally counter-productive to do as you suggest.
I am not aware of anyone doing so - but your logic for hiding the fact makes no sense.
www.coas.oregonstate.edu...
The DC-8 intercepted its own contrail after performing a twenty-minute racetrack pattern ... we estimate the length of the DC-8 contrail to be about 280 km.
As the international community continues to work toward emissions reductions, some climate scientists are turning to the concept of geoengineering-the deliberate manipulation of the Earth's climate-to offset the effects of climate change. The concept, however, raises scientific, political, and ethical questions. Join M. Granger Morgan and John D. Steinbruner to discuss the development of an international framework for geoengineering and the implications of these technologies for U.S. foreign policy
con·cept noun ˈkän-ˌsept
Definition of CONCEPT
1: something conceived in the mind : thought, notion
2: an abstract or generic idea generalized from particular instances
2.3 Aerosol Injection Scenarios
An issue that has been largely neglected in geoengineering proposals to modify the stratospheric aerosol is the methodology for injecting aerosols or their precursors to create the desired reflective shield. As exemplified in Section 2.4, climate simulations to date have employed specified aerosol parameters, including size, composition and distribution often with these parameters static in space and time. In this section we consider transient effects associated with possible injection schemes that utilise aircraft platforms, and estimate the microphysical and dynamical processes that are likely to occur close to the injection point in the highly concentrated injection stream. There are many interesting physical limitations to such injection schemes for vapours and aerosols, including a very high sensitivity to the induced nucleation rates (e.g. homogeneous nucleation) that would be very difficult to quantify within injection plumes. Two rather conservative injection scenarios are evaluated, both assume baseline emission equivalent to ∼2.5 Tg S/yr (which ultimately forms about 10 Tg of particles): 1) insertion of a primary aerosol, such as fine sulfate particles, using an injector mounted aboard an aircraft platform cruising in the lower stratosphere; and 2) sulfurenhanced fuel additives employed to emit aerosol precursors in a jet engine exhaust stream. In each case, injection is assumed to occur uniformly between 15 and 25 km, with the initial plumes distributed throughout this region to avoid hot spots. Attempts to concentrate the particles at lower altitudes, within thinner layers, or regionally — at high latitudes, for example — would tend to exacerbate problems in maintaining the engineered layer, by increasing the particle number density and thus increasing coagulation. Our generic platform is a jet-fighter-sized aircraft carrying a payload of 10 metric tons of finely divided aerosol, or an equivalent precursor mass, to be distributed evenly over a 2500 km flight path during an four-hour flight (while few aircraft are currently capable of sustained flight at stratospheric heights, platform design issues are neglected at this point). The initial plume cross-section is taken to be 1 m2 , which is consistent with the dimensions of the platform. Note that, with these specifications, a total aerosol mass injection of 10 Tg of particles per year would call for one million flights, and would require several thousand aircraft operating continuously into the foreseeable future. To evaluate other scenarios or specifications, the results described below may be scaled to a proposed fleet or system
Originally posted by Tecumte
...Still I think at the very least few people would disagree (I know some will have to), whatever the cause, we have a massive pollution problem coming from different planes, as witnessed in the videos, that is in many areas causing huge masses of man made clouds that blocks out the sun and turns once blue skies in to haze once it spreads. This should be apparent by the huge amounts of graphic footage out on the net and from satellite, and I am encouraged so many more people are looking up, seeing it, and asking questions...
10 metric tons over 2,500 km. That's 4kg per kilometer. 9 pounds.
Our generic platform is a jet-fighter-sized aircraft carrying a payload of 10 metric tons of finely divided aerosol, or an equivalent precursor mass, to be distributed evenly over a 2500 km flight path
For quantity needed, follow this simple rule of thumb: one 50 lb. bag of chalk will stripe approximately 300' L x 2" W x 1/16" D line.
There are also legal, moral, ethical, financial, and international political issues associated with a manipulation of our environment. Commentaries (Lawrence, 2006; Bengtsson, 2006; Kiehl, 2006; Cicerone, 2006;MacCracken, 2006) to Crutzen (2006) address some of these issues and remind us that this approach does not treat all the consequences of higher CO2 concentrations (such as ocean acidification; others are discussed in Robock (2008)).
Recently, climate modellers have begun efforts to provide more quantitative assessments of the complexities of geoengineering by sulfate aerosols and the consequences to the climate system (Rasch et al., 2008; Robock et al.,
2008; Tilmes et al., 2008a,b).
10 metric tons over 2,500 km. That's 4kg per kilometer. 9 pounds. You really think that you would be able to see 9 pounds (think of a bag of flour) of particles much smaller than the wavelength of light, spread over a kilometer? You really think that much material would be visible as it spread out 6 miles overhead?
2) sulfurenhanced fuel additives employed to emit aerosol precursors in a jet engine exhaust stream
Yes, it will be visible. When any particle is heated and released into the atmosphere it will cause the moisture in the surrounding air to condensate around it and becoming a visible chemtrail.
Originally posted by MathiasAndrew
When any particle is heated and released into the atmosphere it will cause the moisture in the surrounding air to condensate around it and becoming a visible chemtrail.
reply to post by Phage
So how do those particles multiply and spread to form a full layer?
Originally posted by MathiasAndrew
reply to post by Essan
You are not applying my statement in the context in which it was meant. I am referring to the injected aerosol particles that flow into the exhaust stream of the aircraft..
Nothing is absolute and I am not saying all aircraft at all times.
In which case maybe you can provide a picture of what real chemtrails, caused by geoengineering, look like? So I might identify one should they ever occur over Britain
Originally posted by Essan
Originally posted by MathiasAndrew
When any particle is heated and released into the atmosphere it will cause the moisture in the surrounding air to condensate around it and becoming a visible chemtrail.
So all aircraft will at all times produce visible contrails?
Ah, I see a problem.....
Originally posted by MathiasAndrew
reply to post by Phage
So how do those particles multiply and spread to form a full layer?
Why don't you ask the people doing it this question?
I didn't invent the stuff or study it so I can't answer that question.