View allAll Photos Tagged contrails
Contrails are line-shaped clouds produced by aircraft engine exhaust or changes in air pressure, typically at aircraft cruising altitudes several miles above the Earth’s surface. Contrails are composed primarily of water, in the form of ice crystals. The combination of water vapor in aircraft engine exhaust and the low ambient temperatures that exist at high altitudes allows the formation of the trails. (Source: Wikipedia)
Aircraft condensation trails (contrails) that have persisted for at least 10 minutes will be given the name of the genus, Cirrus, followed only by the special cloud name “homogenitus”, so a contrail will be known only as Cirrus homogenitus. As new, or recently formed aircraft condensation trails may undergo a fairly rapid state of change and may display a variety of transient shapes, no species, varieties or supplementary features will be applied to the name. (Ref: WMO Climate Atlas)
Exhaust contrails are formed by the mixing of the hot humid exhaust of the engines with cold humid surrounding air, creating long streamers of clouds. If the conditions are right then these can persist and spread. These are the most common type of contrail observed.
This is a China Airlines Boeing 777-F en route from Taipei to LAX at flight level 350 over Goleta, California.
Watching the sun set over Yorkshire a plane flew across the hills leaving a contrail glowing gold across the sky.
A pretty remarkable "negative contrail", carved by the passage of an aircraft through a thin cloud layer: the hot exhaust presumably caused the cloud to disappear locally. This is contrary to the normal effect, where water in the exhaust condenses out to form a "positive" contrail.
It's most definitely not a shadow cast by a positive contrail on a lower layer: I watched this one form, then widen, then dissipate.
More explorations with the X-Pro1. Kinda loving the 50s feel to this image. I suppose the vintage camera adds to that ;)
One of a series of sky photos taken at sunset over the Cathedral City of Lincoln.
You can see a random selection of my photos here at Flickriver: www.flickriver.com/photos/9815422@N06/random/
Several contrails slide the sky above Estremoz while the sun is close to set above Serra d'Ossa. The ruin is the old ermitage of St. Lazarus, now a ruin and surrounded by a vineyard.
As the Autumn starts to move in the days are getting shorter, and my chances of getting sunset shots from Neigh Bridge diminish.
Aperture ƒ/20.0
Focal length 18.0 mm
Shutter 2 secs
ISO 100
A contrail is that long thin artificial cloud that sometimes forms in the wake of aircraft. I could have photoshopped it out, but I decided it was an inherent part of the image.
N.B. See my profile for usage guidelines.
FP-100c, 150mm.
Also, this made the Flickr Blog! Awesome: blog.flickr.net/en/2014/03/05/twittertuesday-airplane/