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Showing posts with label Lenticular Clouds. Show all posts
Showing posts with label Lenticular Clouds. Show all posts

Monday, March 8, 2010

10 Most Incredible Images of Anticrepuscular Rays

From: http://www.environmentalgraffiti.com/

Over Boulder, Co

Anticrespulcular rays captured just outside Boulder, CO
Image: John Britton

How many people turn around when they watch a beautiful sunset? Not many, but here are a few good reasons why they should. Anticrepuscular rays are spectacular optical phenomena that are quite rare and they require the viewer to have his or her back to the sun or sunset point. Like crepuscular rays, covered here earlier, they are columns of sunlit air streaming through gaps in clouds. Yet while the former seem to converge from the sun, anticrepuscular rays converge toward the antisolar point – the point in the sky directly opposite the sun – creating some stunning effects.

Nothing supernatural here or is there?
Over South Africa
Image: Carolina Ödman

Radiating from this ship in Ye Liou, Taiwan?
Ye Liou, Taiwan
Image: Unknown photographer

Anticrepuscular rays actually do not radiate from one point but are parallel shafts of light. They produce an optical illusion explained by da Vinci’s linear perspective according to which at distance, all things convert to a central point. It’s similar to a long, straight road converging toward the horizon regardless of which way one is looking.

The illusion is even more spectacular when the anticrepuscular rays seem to converge from an object like the ship above or this rock at Horseshoe Canyon in Utah, below.

At Horseshoe Canyon, Utah
Image: Peggy Peterson

With a tinge of pink, in Florida:
Florida
Image: Daniel Herron

The hours around dusk and dawn are called the crepuscular hours (literally: relating to twilight) and have given this light phenomenon its name. Dusk and dawn are the times of the rays’ most frequent occurrences because then, the contrast between light and dark is the most obvious.

Seen from a plane while flying over Arizona:
Over Arizona
Image: Craig Gould

If crepuscular rays are called God’s Fingers, would anticrepuscular rays be the opposite, the Devil’s Feelers maybe?

Divine intervention?
Divine intervention
Image: Piccolo Namek

We can see why these images are often used for religious pamphlets:
Anticrepuscular rays
Image: Luis Argerich

The image below seems to show anticrepuscular rays converging from a gorgeous glory, captured above the clouds on a flight to southwestern Tennessee. Below the clouds, the phenomenon would have been observed as crepuscular rays.

Rays and glory:
On plane to Tennessee
Image: Tim Stone

The last pic should clear up any questions about anticrepuscular rays:
Setting sun + well placed clouds + a bit of luck = anticrepuscular rays.

Panoramic view of anticrepuscular rays over Chandler, Arizona:
Panoramic view
Image: Ian Schlueter

So next time you watch a spectacular sunset, make sure to turn around as something unusual if not even more spectacular may be awaiting you.

Sources: 1, 2, 3

Wednesday, November 25, 2009

The Worlds Most Amazing Cloud Formations

Posted by travelet in Featured Articles
from: http://www.travelet.com/2009

In its own way, every cloud formation is beautiful and unique. The beauty of it could be in its color, its shape or its sheer size. Yet every once in a while, someone with a good camera chances upon those truly amazing cloud formations – the variety whose image gets stuck in your mind, freezes there and ‘refuses’ to go away. The variety that you know that you may never get to see again in your lifetime, however longer you live thereafter. Those are the types of cloud formations we refer to as the world’s most amazing formations.

There are a number of such truly amazing cloud formations on the online photo sharing site, Flickr. It is true, looking at flicker images, that you may not be able to conjure the exact feel the photograph-taker got upon sighting the cloud formations in question. Yet if the forms, sizes and colors on these images of cloud formations are anything to go by, you know that you are looking at some of the world’s most amazing cloud formations.

01-wd1009-Yellow_cloudsFlorence, Italy Flickr.com

There is, for instance, one attributed to an obviously highly experienced photographer by the name Frank Slack, with the yellowish brown glow of a setting sun in the distance, as one example of such truly amazing cloud formations. The formation in question here – taken in the part of Italy known as Florence, is not spectacularly big, or particularly beautiful in form. The beauty in question, rather, lies in its color: the said yellowish brown tint of a setting sun, which is accentuated. To be sure, many people have been able to capture this phenomenon of the setting sun, before. They however, tend to do in from a distance: so that the yellowish brown tint is seen from a far. What Frank Slack has done away, however, is to capture the phenomenon roughly overhead: coming up with what can only be described as an amazing image.

02-wd1009-moving-cloudsHuntsville, Alabama Flickr.com

Then there is another amazing cloud formation whose image is to be found on the same photo sharing site (Flickr), and which is attributed to a photographer known as Wes Thomas. Said to have been taken at Huntsville Alabama, the beauty of this formation lies in its shape and size, rather than color (seeing that it was taken at night, according to the blurb alongside it). Words can’t describe it enough. Suffice it to say that it is the type of cloud formation that one is first tempted to dismiss as graphically altered with Photoshop or something, before getting to look at it more keenly.

03-wd1009-red-cloudsNew York Flickr.com

Still at Flickr, another truly amazing cloud formation we identified is one attributed to Ben Brown, apparently taken from New York’s Brooklyn Bridge. The wonderment here is in the color: it being a tone of red one wouldn’t ordinarily attribute to nature. The dispersed sheep wool shapes in it too, are amazing, as is the background against which it is taken under the Brooklyn Bridge.

04-wd1009-rio-vistaRio Vista, California Flickr.com

A blue-red cloud formation, taken in Rio Vista California by a photographer named Rebecca is worth of inclusion among the world’s most amazing cloud formations.

05-wd1009-rainbow-cloudsWalla Walla, Washington Flickr.com

There is also, still from Flickr, a deep blue formation, taken by Lynn Suckow at Walla Walla Washington – which for its color and form, earns a place among the world’s most amazing could formations.

06-wd1009-lenticular-cloudsValencia, Spain Flickr.com

Marialuisa Wittlin’s yellowish brown cloud formation, taken in Valencia Spain, earns a place among the world’s most amazing cloud formations on three counts: color, form and size (this time the note on size being on account of smallness and hence ‘cuteness’).

07-wd1009-nacreous-cloudsBuskerud, Norway Flickr.com

Still exploring Flickr, we come across Kalinka Iglesias’ pearl colored formation, photographed in Beskerud Norway, as yet another worth entry to the list of the world’s most amazing cloud formations.

08-wd1009-Cloud-IridescenceCentral Illinois Flickr.com

To close the list, at least for now, is the formation formed by diffusion of sunlight into quite thin clouds, with hints of water in them – taken by someone in Central Illinois. A truly amazing work of nature, is the only way one would describe these amazing cloud formation.

Looking at all these formations, one is tempted to ask why we (ourselves) never get to sight similar patterns. Turns out that it is not because one never comes across such patterns, but rather because we tend not to be tuned in well enough to take note them. Look up, sometimes, and you may see wonders.

Thursday, January 22, 2009

APOD: A Lenticular Cloud Over New Zealand


See Explanation.  Clicking on the picture will download  the highest resolution version available.

A Lenticular Cloud Over New Zealand
Credit & Copyright: Chris Picking (Starry Night Skies Photography)

Explanation: What's happening above those mountains? Several clouds are stacked up into one striking lenticular cloud. Normally, air moves much more horizontally than it does vertically. Sometimes, however, such as when wind comes off of a mountain or a hill, relatively strong vertical oscillations take place as the air stabilizes. The dry air at the top of an oscillation may be quite stratified in moisture content, and hence forms clouds at each layer where the air saturates with moisture. The result can be a lenticular cloud with a strongly layered appearance. The above picture was taken in 2002 looking southwest over the Tarurua Range mountains from North Island, New Zealand.

Monday, January 5, 2009

WTF Are Lenticular Clouds?


Lenticular Clouds are often mistaken for UFOs

(click on any image to enlarge)

Lenticular clouds, technically known as altocumulus standing lenticularis, are stationary lens-shaped clouds that form at high altitudes, normally aligned at right-angles to the wind direction.

In short: they look badass.


(images credit: Valuca)




(images credit: Valuca)

These clouds are formed by so-called "mountain waves" of air created by strong winds forced over high mountains. Then they hang over the mountains like alien "motherships"... Mount Rainier in Washington produces some of the most spectacular lenticulars.


Copyright (c)2002 Christopher J Picking


(image credit: Peter Michaud)


Mount Erebus, Antarctica (US Coast Guard photo)


(image credit: Doug Cruikshank)


(image credit: J. D. Rufo, J. Koermer)



Click here for more crazy Cloud Formations: [Gallery of Clouds]