Jet Pollution Or What?

[skydawg]

You fully intend to take this right down the conspiracy path don't you. Which is exactly where this thread belongs.

[Gilchy]

But if you can't read the logo on a jet from where you're standing, it's likely a chem trail. Just wait three days before committing any acts to perpetuate the species.

if you believe in chemtrails, wait until you do not anymore before committing above acts please :)

[Dizzy1]

Try this http://www.flightradar24.com/ It's live. With it You can identify any aircraft overhead, where it's from, who it is and where it's going. When You see a suspected poison dispersing aircraft over head identify it with this program and report back, We will have it banned.

Their desktop site gets kind of buggy every once in a while, I find the mobile app a bit better. They have one feature if you hold your phone at an aircraft in the sky, it'll give you the info. There are other flight trackers online as well such as flightaware.

FR24 did have some fun yesterday though, with it being Back To The Future Day ...

http://www.flightradar24.com/data/airplanes/outatime/

... kinda fun tracking Dr. Emmett Brown in his DeLorean :)

[Dizzy1]

There are days when you will see aircraft with no contrails, other days you'll see short, other days medium and other days persistent. It all relates into the atmospheric conditions at the time, altitude, temperature, relative humidity and saturation points. The links provided are excellent sources of information as is this one ...

https://en.wikipedia.org/wiki/Contrail

[Terris]

http://www.hangthebankers.com/bill-gate ... hemtrails/

What really makes me wonder is the Echinacea farm directly under the flight path at the north end of the Kelowna Airport.

These lands have been saturated for years with unburned jet fuel, exhaust and highway traffic pollution...

[mkulhawe]

The condensation from your breath quickly evaporates, usually in less than a second. Condensation trails from a jet can last for many minutes, even for hours sometimes. So why is there this difference? Why do jet contrails sometime persist, but your breath condensation quickly evaporates?

The difference is because a contrail freezes.

It’s really that simple. Contrails form at -40 degrees Fahrenheit (which is also -40 Celsius), or colder. At that temperature the tiny drops of condensed water will instantly freeze. Once frozen they can not evaporate. They also can’t melt, as it’s -40. They can however fade away through a process known as “sublimation” – where a solid turns into a gas.

You’ve seen sublimation before. Dry Ice is frozen carbon dioxide. It does not melt, it just sublimes directly into the gas. If you take a bit of dry ice, and just leave it in the sun, it will just kind of fade away. That’s what happens to the ice in a contrail.

Ice will only sublime if the humidity (at that altitude) is lower than around 60% to 70%. So if it’s a bit higher then the contrail can last for a long time, just like clouds do sometimes. If the humidity is low, then the sublimation happens very fast, and the contrail only lasts a minute or so. If the humidity is high (above 70%) then you get reverse sublimation (also called desublimation or deposition, where water vapor turns directly to ice, but only when in contact with ice), and even more ice will form on the frozen condensation, the ice crystals will get bigger, and sink faster, causing the trail to spread out as it sinks through altitudes with different wind speeds.

So, the difference can be summed up as:

Contrail = Condensation + Freezing + Sublimation
Breath = Condensation + Evaporation

[SmokeOnTheWater]

Love this video.
Either you see it or not our skies are polluted.
World Air Traffic over a 24 hour period.

[maryjane48]

http://news.nationalgeographic.com/news ... vironment/

[Dizzy1]

http://news.nationalgeographic.com/news/2010/10/101005-planes-pollution-deaths-science-environment/

While I agree that pollution has a negative affect on our health, tabloid headlines such as that are nothing but fear mongering. Now that Fox owns NatGeo I have a feeling we'll be seeing more and more of such over exaggerated, attention grabbing articles.

[maryjane48]

this is offtopic kinda , but when nat geo put out a artckle on 9/11 backing what bush said , do you feel same way about that ?
http://m.natgeotv.com/ca/inside_911/vid ... -zero-hour

[Dizzy1]

this is offtopic kinda , but when nat geo put out a artckle on 9/11 backing what bush said , do you feel same way about that ?
http://m.natgeotv.com/ca/inside_911/vid ... -zero-hour

I haven't watched it to be honest. But here is an example of what I mean ...

http://www.youtube.com/watch?v=-hDgtyIbD-M

... The original footage was from Ice Pilots, they were delivering a couple of planes to Turkey for forest fighting. During the training sessions, the one Turkish pilot forgot to lower the gear and ended up scraping the belly on the runway. If you watch the NatGeo version of this, the added dramatic music tried to turn a minor incident into something it isn't. But that wasn't the worst - they added scraping noise as the aircraft was on the runway and dubbed over the top prop sounds as they aircraft climbed away. For what purpose? To simply try and enthral the viewer and make it more interesting then what it is.

NatGeo used to be an amazing magazine when I grew up, the stories and photos brought the world to my eyes and it was done professionally. When we ordered our TV package, the only 3 channels I wanted were NatGeo, History and Discovery - but today, those channels offer mistly over dramatized "reality" rubbish that doesn't interest me at all. Granted, they still have some very well done shows such as Mayday although some of those reenactment scan be pretty hard to watch.

Sorry for going on about that - just wanted to kind of explain where I was coming from.

[maryjane48]

its all good because i feel same way , i think nat geo is now more drama than facts