JazzRoc versus “Chemtrails”

Contrail Facts and “Chemtrail” Fictions

Posts Tagged ‘standard

6 Porkies

with 4 comments



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“PORK PIE” = “LIE”  – Cockney rhyming slang. 



“Obviously your alleged credentials are fraud” – has your short-term memory passed away? ONE.

“A true person of Science would step forward and lay all questions to rest” – ditto, and I have. Check my comments here. Check http://www.contrailscience.com. Check http://www.myspace.com/jazzroc TWO.

“You do nothing” – I COULD start pasting again… THREE.

“It is safe to assume that people’s claims must have basis” – assuming is the only action you do. Why not educate yourself in science? FOUR.

“I’d like nothing more than for someone to prove nothing is going on” – FIVE.

“You are by far not only a fraud but a coward as well” – GIANT PORKY NUMBER SIX.


What a great porky this one is!

The non-scientific word-association goes aerosol – hair spray – sprayers (truly inspirational!)




But never a thought to CHECKING UP what the REAL MEANING (scientific meaning) of aerosol ACTUALLY IS:

Aerosol – from Wikipedia, the free encyclopedia
Aerosol – contamination in northeastern India and Bangladesh.
Technically, an aerosol is a suspension of fine solid particles or liquid droplets in a gas. Examples are smoke, oceanic haze, air pollution, smog and CS gas. In general conversation, aerosol usually refers to an aerosol spray can or the output of such a can.
The word aerosol derives from the fact that matter “floating” in air is a suspension (a mixture in which solid or liquid or combined solid-liquid particles are suspended in a fluid). To differentiate suspensions from true solutions, the term sol evolved – originally meant to cover dispersions of tiny (sub-microscopic) particles in a liquid.
With studies of dispersions in air, the term aerosol evolved and now embraces both liquid droplets, solid particles, and combinations of these.

Workplace exposure
Concentrated aerosols from substances such as silica, asbestos, and diesel particulate matter are sometimes found in the workplace and have been shown to result in a number of diseases including silicosis and black lung. Respirators can protect workers from harmful aerosol exposure. In the United States the National Institute for Occupational Safety and Health certifies respirators through the National Personal Protective Technology Laboratory to ensure that they protect workers and the public from harmful airborne contaminants.

Effect on climate
Aerosols over the Amazon each September for four burning seasons (2005 through 2008). The aerosol scale (yellow to dark reddish-brown) indicates the relative amount of particles that absorb sunlight. Anthropogenic aerosols, particularly sulfate aerosols from fossil fuel combustion, exert a cooling influence on the climate which partly counteracts the warming induced by greenhouse gases such as carbon dioxide. This effect is accounted for in many climate models. Recent research, as yet unconfirmed, suggests that aerosol diffusion of light may have increased the carbon sink in the earth’s ecosystem.

Recent studies of the Sahel drought and major increases since 1967 in rainfall over the Northern Territory, Kimberley, Pilbara and around the Nullarbor Plain have led some scientists to conclude that the aerosol haze over South and East Asia has been steadily shifting tropical rainfall in both hemispheres southward.

The latest studies of severe rainfall declines over southern Australia since 1997 have led climatologists there to consider the possibility that these Asian aerosols have shifted not only tropical but also mid-latitude systems southward.

Oxides of nitrogen (NOx) in the atmosphere are a form of pollution which can give rise to smog and act as a greenhouse gas. Their persistence in the atmosphere is affected by aerosol droplets of water.
In 1964 long chain fatty acids, either naturally produced from marine organisms dispersed into the atmosphere by wave action or man-made, were found to coat these droplets. In 2006 there was a study of the effect of the LCFA on the persistence of NOx, but the long term implications, although thought to be significant, have yet to be determined.

So AEROSOL means this:

Or this:
A REALTIME study of aerosol presence (made by satellite) all over the world may be obtained here, and here is a representative image, from which you can see the satellite passes 90 minutes apart.

There is a video made over a fortnight showing the main aerosol action occurs travelling westward on a line passing through BANGLADESH and the SAHARA DESERT. It is MAN-MADE – the consequence of many hundreds of millions of humans living close to the poverty line…  slash-and-burn, cooking fires, forest fires, vegetable farming decomposition, volcanoes…

No aircraft contrails are found anywhere NEAR this line…

So much for the “chemtrailers” and their “the NWO is poisoning the whole world” theory…



What is it?


It’s a mixture of invisible element and compound gases; nitrogen, oxygen, carbon dioxide, water vapour, argon, neon, and trace amounts of other inert gaseous elements. This mixture keeps us in a healthy condition, and imbalance in this mixture can poison and/or kill us. We would all prefer to be at Standard Temperature and Pressure, which is 20 deg C (70 deg F) and 1000 millibars (14.7 lb/in2).

Standard Temperature and Pressure occur at Sea Level, but the atmosphere may reach up to 200Km or more (the INTERNATIONAL SPACE STATION orbits at 400Km and you can bet there’s very little atmosphere, if any, at that height!) The following diagram is a graph of atmospheric pressure against height over sea level (altitude). The space station height is three graph-heights higher than the graph below.


There is an asymptotic fall-off of pressure with altitude which is easy to see. This, when combined with the concomitant drop in temperature lends weight to the understanding that the stratosphere cannot bear much loading of contrail ice before it saturates, and cannot absorb more.

The region just immediately higher than the tropopause (at approximately 26,000 feet to 39,000 feet) is the region where passenger aircraft fly, for reasons of safety and economy.

The pressure above the tropopause is one-fifth that at sea level, but at the high cruising speed of 550 miles per hour, there is sufficient dynamic lift for safe and stable flight.

This region is the CAUSE of the “chemtrail” controversy, for it is COLD, STABLE, and INCAPABLE of absorbing large amounts of combustion steam as water vapor. As a consequence this steam cools to microscopically-fine ice crystals, which form – TRAILS behind the aircraft.

And the following is a diagram of air dewpoint and temperature plotted against height above sea level (altitude).


If you look at the dewpoint line (on left) you can see it move continually leftward with increase in height above sea level. This powerfully indicates that with increasing height, the atmosphere is increasingly incapable of absorbing the exhaust water formed by burning kerosine in gas turbines.

Looking at the temperature (lapse rate) line on the right, you can see that it moves leftward with increase in height above sea level, until it reaches the tropopause, where it starts to edge to the right again. You can see that after the tropopause the atmosphere gets WARMER with increasing height. The concave shapes to both dewpoint and temperature here indicate some energy input – either solar ‘focusing’ from tropospheric clouds, or jet stream mixing energy – it is hard to guess.

Another couple of points. This chart was obviously made on a cold day; the sea level temperature is just sub-zero. However, two hundred metres higher, and the air temperature is five degrees higher. Bumps and dips in these two lines show where you may infer the presence of clouds.


There is much more to learn about our atmosphere than I have given here, but I can heartily recommend this link to the UK’s Met Office.

After that you can answer these questions (can’t you!).


As further confirmation I strongly recommend AtOptics


And a word to the “wise”. There is a lot of scuttlebutt going around which says “Global Warming is just a myth started by our duplicitous governments as a means of extracting additional taxes”. Well I remember a time when it was thought we were headed directly for a new ice age.

(This was just a journalistic ruse. The next Ice Age will occur approximately 16,000 years from the present.)

Since then, it is true that government funds are available for the investigation of GW to the detriment of other research, and that horrible thing “political correctness” has raised its ugly head above the horizon, but the facts are too numerous to mention that the climate is warming, but also that other facts remain unmentioned, which leaves a question of politics…


See “Global Warming is a Myth” under G in this blog.




One of the major purposes of the World Meteorological Organization (WMO), as laid down in its Convention, is “To facilitate worldwide cooperation in the establishment of networks of stations for the making of meteorological observations as well as hydrological and other geophysical observations related to meteorology, and to promote the establishment and maintenance of centres charged with the provision of meteorological and related services”.

Accordingly, WMO Members operate, in a coordinated manner, complex networks in space, the atmosphere, on land and over oceans. In 2007, Members decided to work towards enhanced integration of both the WMO Global Observing System (GOS) and WMO co-sponsored observing systems such as the Global Ocean Observing System (GOOS), Global Terrestrial Observing System (GTOS) and Global Climate Observing System (GCOS). This concept is called the WMO Integrated Global Observing Systems (WIGOS).

  weather balloon

Currently, more than 10000 manned and automatic surface weather stations, 1000 upper-air stations, over 7000 ships, more than 100 moored and 1000 drifting buoys, hundreds of weather radars and over 3000 specially equipped commercial aircraft measure key parameters of the atmosphere, land and ocean surface every day. The space-based component of the WMO Observing System contains operational polar-orbiting and geostationary satellites and also R&D environmental satellites complementing ground-based global observations. These activities are coordinated within the Global Observing System (GOS) of the World Weather Watch (WWW) of WMO. Several WMO Programmes sponsor or participate in the operation of several global observing systems. Other global observing systems, e.g. the global hydrological networks (WHYCOS), function principally on a national or regional level.

Observation programmes such as the Global Climate Observing System (GCOS) and the Global Ocean Observing System (GOOS) will continue to play a major role in improving the collection of required data for the development of climate forecasts and climate change detection. WMO’s Global Atmosphere Watch (GAW) provides data for scientific assessments and for early warnings of changes in the chemical composition and related physical characteristics of the atmosphere that may have adverse affects upon our environment. Through its Instruments and Methods of Observation Programme (IMOP), WMO ensures that meteorological instruments, including manual and automatic ground-based stations and space-based observing systems, are accurate and provide standardized data.

WMO monitoring and observing systems will be a core component of the Global Earth Observation System of Systems (GEOSS), aimed at developing a comprehensive, coordinated and sustained Earth observation system of systems to understand and address global environmental and economic challenges.


This is, of course, a silly word coined by me to introduce these pictures of Earth’s atmosphere which have been taken by some of the NASA Space Shuttle astronauts from the International Space Station.

I find them most stimulating and interesting. We spend all our time with a “flat-earther” viewpoint, looking up at clouds and failing to see them for what they truly are.

Moment of Launch - "the twang's the thang!"

Moment of Launch - "the twang's the thang!"

Shuttle lift-off at Cape Kennedy

Shuttle lift-off at Cape Kennedy

Out on a limb...

Out on a limb...

A massive cumulo-nimbus from above...

A massive cumulo-nimbus from above...

A Saharan sandstorm leaves the West Coast of Africa

A Saharan sandstorm leaves the West Coast of Africa

Eddies form in Cirrus clouds passing over a Mediterranean isle

Eddies form in Cirrus clouds passing over a Mediterranean isle

A sunset from space...

A sunset from space...


with 3 comments



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One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle. We’re no longer interested in finding out the truth. The bamboozle has captured us. It is simply too painful to acknowledge — even to ourselves — that we’ve been so credulous. (So the old bamboozles tend to persist as the new bamboozles rise.) – Carl Sagan



As a society it falls upon us as individuals to live our lives using the best judgement possible.

For each of us it wasn’t always that way: as children we instinctively believed what our parents told us, which was a powerful defense mechanism that generally kept us out of harm’s way.

As we grow up this gullibility has to be exchanged for a healthy cynicism and sound judgment which will afford some protection from the intentional deception of sociopaths.


This is a comment posted at Uncinus’s excellent site Contrailscience late Sept 2009. It is rare to find such professionalism and terse accuracy in “chemtrailer” writing, and here is an experienced and technically competent writer presenting an opposite point of view. No surprise, there:

boeing factory

For what it is worth, I am a Boeing engineer with 20 years of experience in the aerospace industry.

* There are no special tanks anywhere on our airplanes to hold chemicals to be sprayed out.

* There are no spray nozzles on the airplanes either, unless you count the emergency fuel dump nozzles on the widebody jets.

* This can be readily ascertained by simply looking through an airplane before the interior wall panels are installed. Here is a list of all the tanks which are on a jetliner:

** Fuel, potable water, waste water, engine fire suppressant (Halon + other stuff), cargo fire suppressant (just Halon), hydraulic reservoirs. On the new airplanes you will also see tank-like devices which generate nitrogen to inert the fuel tanks.

* Further, there is no room for such stuff to get installed. You would have to carry TONS of liquid to make spray trails independent of the exhaust condensation, and the only liquid we carry tons of is Jet-A fuel.

* In Everett Washington, the Seattle flight museum has a restoration center where you can go see dismantled airplanes being readied for display in the museum. The work is done almost entirely by volunteers. I assume other flight museums have similar workshops. If you can find one where you live, go to the restoration center and see the planes up close. There’s no where to hide a sprayer system where it wouldn’t be seen by maintenance crews.

* The Boeing final assembly plant is open for tours by the public, and VIPs from all over the world can get close-up tours. The airplanes are built in a staggered sequence, so that two airplanes side-by-side are usually being made for two different airlines.

* The majority of Boeing’s production is sold overseas. In fact, the company is the nation’s largest exporter.

* Thus, if a domestic airplane was modified for “chemtrail production” in the factory, it would be as easy as pie for a foreign VIP to walk over and say, “What are these fancy tanks and sprayers on the American plane which aren’t on my airplane?”

* If any airplane WAS modified for chemtrail to add chemtrail sprayers, the thousands of Boeing employees would have to know. I don’t work in Fuels, and I can identify every tank and tube in the wing area.

* If thousands of Boeing employees knew, then so would thousands of supplier employees who go through our factories, thousands of airlines employees who go through our factories, and all the FAA and NTSB and DOT people as well. Also, our airplanes and factories are inspected by the Aviation Authorities of foreign countries (like EASA from Europe) and they would also need to be in on the conspiracy.

* There would simply be too many people involved to prevent this from leaking out. If the chem trail sprayers were being added in the factory, the secret would be out.

* So what if the chemtrail sprayers were being added by an aftermarket shop?

* You’re back to the same problem. It takes hundreds of people to design, build, and install a major modification on a jetliner, and the mod shops are just as open as Boeing is. You wouldn’t be able to keep the secret.

* Further, most airlines have their planes maintained by outside suppliers, who would have to be in on the conspiracy. Those who do their own maintenance do the work in open bays that again would make it easy to view the modification.

* And you have the same problem that you need to get thousands of maintenance people, suppliers, and certification authorities in on the conspiracy. It would have leaked by now. All it takes is one guy with a cell phone camera, and the world would know.

* So what if they somehow managed to do all this stuff anyway? Now you have to realize that somebody, somewhere, has to be pumping TONS of chemtrail chemicals into these mysterious hidden tanks on the airplanes. You would need a fill valve, and a distribution system, and special trucks carrying the chemicals disguised as fuel trucks. That would take thousands more people to be in on the conspiracy.

* One giveaway would be two fuel trucks pulling up to the same jetliner – one with the fuel and one with the chemicals. Remember, we’re talking about tons of liquid here.

* It just doesn’t work – you would need independent chemical fill ports, and somebody, somewhere, would notice.

* And while we’re talking about it, remember that every jetliner pilot has to check the weight of the plane and calculate a talk off runway length and other factors. The charts are the same for every jetliner of a given type, but if there really were chemtrail sprayers, then the charts for those airplanes would have to be different to account for the tons of chemicals that might be on the airplane.

* So, I really don’t think there is any way to hide the sprayers on jetliners. Too many people would have to know, and it would be too easy to detect by passerby.

* So, what if the chemtrail chemicals are in the jet fuel? This wouldn’t require ANY visible modifications to the airplanes, and far fewer people would have to know about the conspiracy.

* This would be harder to refute, BUT, you would have to discard the “on and off” contrails as being caused by pilots turning sprayers on and off. All the fuel on the plane came from the same fuel trucks and the same fuel tanks, so the supposed chemtrail would have to be continuous from takeoff until landing. I think that would have been noticed by now.

* So to my mind, that pretty much eliminates the possibility of using jetliners to create chemtrails.

* Which means you have to be using military jets, and thousands of them, flying unnoticed back and forth on normal commercial routes. So now you have to have all the air traffic controllers in on the conspiracy as well.

* And the planes will again need special tanks for the chemicals, and special fill ports, and special sprayers, and special tanker trucks filling the chemical tanks on the planes, special non-military suppliers delivering the stuff, and you’re right back to the same issue of needing to keep thousands of people from talking.

Bottom line:
You would need a special delivery system on the airplanes.
You would need a special fill system.
You would need independent tanker trucks.
You would need a separate supply chain.
You would need thousands and thousands of people to hold their tongues, and never have even ONE person leave any incriminating evidence in a safe deposit box to be discovered after their deaths.

It ain’t happening.





“Although chemtrails are conspicuous in our skies and thousands of sites exist about the menace the mainstream media and the authorities are very quiet about the matter or ignore and deny their existence. This of course, adds fuel to the conspiracy theories!

But it’s not just the media and the officials that are silent because there is a similar wall of silence from successful singer-songwriters and rock stars as well as celebrities in general! What does this mean? is there some memo that gets circulated warning that if you mention chemtrails your contract is terminated? Are people too scared to mention such stuff in public? What is going on?

I say we need people who can get the media exposure to come forward on this matter! We need stars to talk about chemtrails on live TV and radio!

I believe we need protest songs about chemtrails! If anyone knows of any please let me know!”

There is no evidence that I have seen that trails in the sky are anything except the water and carbon dioxide (and trace amounts of NOX) left by the passage of gas turbines in the stratosphere.

Now water is drinkable, carbon dioxide is respired by plants to make sugar, and the NOX combines with water to form dilute nitric acid which forms nitrates on contact with soil, helping plants to grow.

The majority of trails in the skies of Earth cross the US continent, so it is they that will bear the brunt of this “contamination”. So be it. Their plants will grow a little better, is all. Although the daily burning of a million tons of kerosine seems massive to you, in relation to the mass of the Earth’s atmosphere it is NOTHING.

ALL of Man’s conflagrations, his best efforts annually, will raise the sea level by 0.0000000000001 per cent, for instance (approximately).

Now, as to whether STRANGE COMPOUNDS are surreptitiously being introduced into burning gas turbines, in order to distribute them as an aerosol throughout the Earth’s atmosphere, why on Earth would anyone do that? (It would HAVE to be THROUGH the turbine because spray devices external to the motor would have to be plainly visible).

It just doesn’t stand up to any logical consideration.

Your ignorance has lead to your paranoia.

I blame Western Culture as a whole for failing to instil a minimum but requisite standard of scientific knowledge for the technological conditions under which we live.

Desist this crap!

“I totally disagree! Please do some research Tony! I have been researching this for a long time! The planet is being geoengineered under Caps & Trade schemes. there are many things being done including weather modification which I have seen in the UK and here and is all known about if you dig deep! Try californiaskywatch.com for starters.”

Seeding clouds for rain with silver iodide crystals (or powdered tea!) is completely harmless. It IS NOT “weather modification”!

I have checked through the website above and NONE of the things mentioned bears ANY relationship to NATURAL VULCANISM, let alone the masses of the land, atmosphere and oceans.

The amount of ocean: imagine a cubic mile of ocean. One mile square, up to the height of Vilaflor from sea level. Got it?

Then imagine 500,000,000 of them.

Counting them at the rate of one per second will take you SIXTEEN years.

The ocean weighs 114,398,298,100,000,000 tons. One hundred and fourteen thousand trillion tons. That’s a HUGE dilution factor…


“you can watch trails that last and spread and no trails or old style contrails at the same time, you can watch planes with no trail start a trail and then stop. you can have a day or period of a day with old style normal clouds and blue sky followed by loads of chemtrails and a sky turned to a mass of fake clouds and haze”.

Contrails are a stratospheric phenomenon (not in the troposphere, where your weather is). The stratosphere is generally stable, layered (like an onion skin) with layers of water/air solutions at various temperatures and humidities. When they are moving in different directions to each other (and falling slightly) they form CIRRUS clouds. When they fall without any relative motion, they form CIRROSTRATUS clouds.


Sometimes the layers are supersaturated and only require flying through (say by glider wings) to condense out water and form clouds. They understandably may get somewhat upset when a clumping great turbofan whistles through them. Sometimes (when the layer is SATURATED) the upset is permanent, but in general the stratosphere is less than saturated, and you see a temporary contrail which trails the plane for say a mile or so, before being re-absorbed. On days when the layers are ALL saturated, the contrails will hang there ALL DAY.

Contrails are WATER, and you are not being sensible.

“you can have a day or period of a day with old style normal clouds and blue sky”.

What you are talking about here is the TROPOSPHERE, which is the air between the ground and the stratosphere.

This is the atmosphere as you experience it at ground level. It is THE BULK of the total atmosphere, half of which is to be found beneath twelve thousand feet.

The STRATOSPHERE is to be found at DOUBLE that height and above, to a height of sixty thousand feet. It is relatively rarefied, very cold (-80 deg F, colder than Mars) and TRANSPARENT.

It is the atmosphere beneath twelve thousand feet which is responsible for the blue in the sky (by scattering of white light – the blue “scatters” whilst the red continues straight on).

On bad days in the latter part of WWII, the stratosphere was supersaturated when USAF Flying fortresses set out to precision-bomb German targets in their thousands. The Germans could see them coming from three hundred miles away, without radar, and could adjust their fighter attacks with time to spare. Bad days, with hundreds of bombers littering the path back to Blighty.

Do you suppose those bombing raids were chemical attacks?

“listen Tony I don’t see why you feel the need to insult me!”

No insult intended. I DESCRIBED you.

“i didn’t start this argument and if you have nothing f—ing better to do with your time f— off”.

It’s not an argument. It’s a discussion. I consider it important to correct the foolishness of a friend.

“I know what I see and have the opinions of thousands of others who see likewise”.

You don’t “know” what you see. That’s the point. You’re blogging others down a foolish path. That I feel compelled to prevent. The opinions of other deluded people don’t count for much, do they? Nor should you help to delude them, should you? It would be harmful, even evil, wouldn’t it?

“i certainly don’t need to be insulted by someone I thought was a friend”.

Then don’t FEEL insulted. You’re not the only person that has been foolish in the world are you?

I have given you an accurate account of what it was you thought you had seen. You have been given the benefit of my scientific experience.

Would it have been kind to remain silent?

You should should consider yourself assisted, helped, loved, by this friend, and as a consequence GIVE THIS STUPIDITY UP!



Cygnus X-1



It seems to be normal for chemtrailers not to understand why our skies are blue.

Where were these people in junior school, or in science class? Outside?

White light is a MIXTURE of visible light frequencies. The Sun (which is the main source of all light by which we see, is a very hot body which radiates photons of many frequencies, some of which are so energetic that they would harm us if they could pass through our atmosphere – but they cannot.

What does pass through is mainly a tight group of frequencies, spanning just over an octave, which our eyes can see.

Our eyes have evolved to make use of these frequencies – naturally.


Wikipedia: Rayleigh scattering


Rayleigh scattering causes the blue hue of the daytime sky and the reddening of the sun at sunset

It is more dramatic after sunset. This picture was taken about one hour after sunset at 500m altitude, looking at the horizon where the sun had set, showing the more intense scattering of blue light by the atmosphere relative to red light.

Rayleigh scattering (named after the English physicist Lord Rayleigh) is the elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the light. It can occur when light travels in transparent solids and liquids, but is most prominently seen in gases.

Rayleigh scattering of sunlight in clear atmosphere is the main reason why the sky is blue: Rayleigh and cloud-mediated scattering contribute to diffuse light (direct light being sunrays).

For scattering by particles similar to or larger than a wavelength, see Mie theory or discrete dipole approximation (they apply to the Rayleigh regime as well).

Small size parameter approximation
The size of a scattering particle is parametrized by the ratio x of its characteristic dimension r and wavelength lambda:


Rayleigh scattering can be defined as scattering in the small size parameter regime x < 1. Scattering from larger spherical particles is explained by the Mie theory for an arbitrary size parameter x. The Mie theory reduces to the Rayleigh approximation.


The amount of Rayleigh scattering that occurs for a beam of light is dependent upon the size of the particles and the wavelength of the light (lambda). Specifically, the intensity of the scattered light varies as the sixth power of the particle size and varies inversely with the fourth power of the wavelength.

The intensity I of light scattered by a single small particle from a beam of unpolarized light of wavelength lambda and intensity I0 is given by:


where R is the distance to the particle, lambda is the scattering angle, n is the refractive index of the particle, and d is the diameter of the particle.

The angular distribution of Rayleigh scattering, governed by the (1 + cos^2*lambda) term, is symmetric about the plane normal to the incident direction of the light (i.e. about lambda = 90°), and so the forward scatter equals the backwards scatter. Integrating over the sphere surrounding the particle gives the Rayleigh scattering cross section.

The Rayleigh scattering coefficient for a group of scattering particles is the number of particles per unit volume N times the cross-section. As with all wave effects, for incoherent scattering the scattered powers add arithmetically, while for coherent scattering, such as if the particles are very near each other, the fields add arithmetically and the sum must be squared to obtain the total scattered power.


Rayleigh scattering from molecules
A 5 mW green laser pointer is visible at night due to Rayleigh scattering and airborne dust. Rayleigh scattering from molecules is also possible. An individual molecule does not have a well-defined refractive index and diameter. Instead, a molecule has a polarizability a, which describes how much the electrical charges on the molecule will move in an electric field. In this case, the Rayleigh scattering intensity for a single particle is given by


The amount of Rayleigh scattering from a single particle can also be expressed as a cross section s. For example, the major constituent of the atmosphere, nitrogen, has a Rayleigh cross section of 5.1×10^-31 m^2 at a wavelength of 532 nm (green light). This means that at atmospheric pressure, about a fraction 10^-5 of light will be scattered for every meter of travel.

The strong wavelength dependence of the scattering (~lambda-4) means that blue light is scattered much more readily than red light. In the atmosphere, this results in blue wavelengths being scattered to a greater extent than longer (red) wavelengths, and so one sees blue light coming from all regions of the sky. Direct radiation (by definition) is coming directly from the Sun. Rayleigh scattering is a good approximation to the manner in which light scattering occurs within various media for which scattering particles have a small size parameter.

Reason for the blue color of the sky
Rayleigh scattering is responsible for the blue color of the sky during the day. Rayleigh scattering is inversely proportional to the fourth power of wavelength, which means that the shorter wavelength of blue light will scatter more than the longer wavelengths of green and red light. This gives the sky a blue appearance.

Conversely, looking toward the sun, the colors that were not scattered away – the longer wavelengths such as red and yellow light – are visible. When the sun is near the horizon, the volume of air through which sunlight must pass is significantly greater than when the sun is high in the sky. Accordingly, the gradient from a red-yellow sun to the blue sky is considerably wider at sunrise and sunset.

Rayleigh scattering primarily occurs through light’s interaction with air molecules. Some of the scattering can also be from aerosols of sulfate particles. For years following large Plinian eruptions, the blue cast of the sky is notably brightened due to the persistent sulfate load of the stratospheric eruptive gases. Another source of scattering is from microscopic density fluctuations, resulting from the random motion of the air molecules. A region of higher or lower density has a slightly different refractive index than the surrounding medium, and therefore it acts like a short-lived particle that can scatter light.
Rayleigh scattering at Hyperphysics
Maarten Sneep and Wim Ubachs, Direct measurement of the Rayleigh scattering cross section in various gases. Journal of Quantitative Spectroscopy and Radiative Transfer, 92, 293 (2005).
C.F. Bohren, D. Huffman, Absorption and scattering of light by small particles, John Wiley, New York 1983. Contains a good description of the asymptotic behavior of Mie theory for small size parameter (Rayleigh approximation).
Ditchburn, R.W. (1963). Light (2nd ed.). London: Blackie & Sons. pp. 582–585.
Chakraborti, Sayan (September 2007). “Verification of the Rayleigh scattering cross section”. American Journal of Physics 75 (9): 824-826. doi:10.1119/1.2752825.
Ahrens, C. Donald (1994). Meteorology Today: an introduction to weather, climate, and the environment (5th ed.). St. Paul MN: West Publishing Company. pp. 88–89.

syrian 747

And so when we see aircraft from the ground (this is a Syrian Air Boeing 747) we cannot expect to see its markings. They have been “scattered” away. You will only see its markings by taking pictures of it from up close.



It’s that moment when you have engaged your sophisticated and educated brain in a discussion with a chemtrailer and he suddenly starts talking about vertical “chemtrails” and challenges you to to justify those… You point out that only some fighter aircraft can travel vertically, and this guy says no, it was a “tanker aircraft” and while you are wondering what the hell, you realize that he doesn’t understand perspective at all, and he’s really talking about trails coming towards you and passing overhead you. Which means, of course, that you’re wasting your time with exotic explanations involving crossing shuttle routes.

Or when someone sends you a picture of a broken trail, and you can see that it had been a continuous trail before some crook had photoshopped it. So you tell him it’s a fraudulent picture, and so he sends you a color-processed copy so damned effective that you can see each individual photoshop spraying pass, thinking he has proved his point. I drew lines and arrows pointing exactly where it was occurring, and he still couldn’t see it.

Enough from me.

I want information, not a video of some guy’s grass saying “chemtard” over and over. ”

But, that is what this video IS! You are complaining because I didn’t give YOU what YOU want in this video?! Are you f*****g kidding me?! I didn’t force you to come here and make the assumption that I’m supposed to “teach” you something! I make it PERFECTLY clear in my videos that I’m not here to educate any lazy and ignorant chemtard! I tried that in the past… It wasn’t worth my time. Learn for yourself!
I even make it PERFECTLY clear in the “info” area that I don’t have time to be wasting on f*****g ignorant chemtards! Where do you see ANYTHING about me being an information booth?! Who said it’s MY f*****g job to educate YOU?!?

I must say he seems reasonable to me. Stars, save me…