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Arctic Mirage (Hillingar) - Geophysical Institute In the arctic mirage a distant object appears right way up but higher up than the actual location Though arctic and desert mirages seem to be quite different, they share a common fundamental cause It is that light rays passing from an object through air to an observer always refract (bend) in the direction of increasing air density
Mirages - Geophysical Institute Though popular lore has it that mirages occur in deserts, Fairbanks has an unusual number It is quite common to look out across the Tanana Valley and see elevated lines of trees and rapidly changing square-topped images of the peaks in the Alaska Range to the south
The Highest Mirage in North America - Geophysical Institute This type of arctic mirage differs from "inferior" mirages, those that occur in deserts or over hot road surfaces, because the air layers are reversed In a desert or on hot blacktop, heated air lies at the surface, covered by a layer of cooler air
Fata Morgana - Geophysical Institute The fate morgana mirage is one that can occur only where there are alternating warm and cold layers of air near the ground or water surface Instead of traveling straight through these layers, light is bent towards the colder, hence denser, air The result can be a rather complicated light path and a strange image of a distant object
Unusual Events in the Sky - Geophysical Institute Fireball meteors, auroras, noctilucent clouds, mirage phenomena, atmospheric dust, city lights reflected from clouds, earthquake lights, lightning, forest fires, ice crystals and raindrops in the air, plus a host of other phenomena can create strange effects
Tanana Valley Mirages - Geophysical Institute Art Greenwelt of Fairbanks asks the question: "Why do peaks of the Alaska Range, when seen from Fairbanks during the winter, sometimes appear to be chopped off, flattened into mesas, or even floating in midair?"
The Parry Arc - Geophysical Institute Among reports of peculiar mirages or other strange phenomena observed in the Arctic is one described by P Berwick of Fairbanks In that instance several people at a DEW-Line site saw, on two different nights, what appeared to be the lights of a large city on the horizon Was this a mirage, the northern lights or what?
Pingos - Geophysical Institute It's a conical hill found in the Arctic and often has a crater lake in the center It has been formed since the last ice age and can be found in sizes ranging from 50 feet to over a quarter of a mile across