Saturday, October 21, 2006
nacreous clouds
another awesome sky show i showed up too late to see.
Nacreous clouds glow brightly with vivid iridescent colours. They are wave clouds and their undulating sheet-like forms reveal the winds and waves of the stratosphere.
These rare clouds, sometimes called mother-of-pearl clouds, are 15 - 25km (9 -16 miles) high in the stratosphere and well above tropospheric clouds. They are iridescent but higher and rarer than ordinary iridescent clouds. They occur mostly but not exclusively in polar regions and in winter at high latitudes, Scandinavia, Alaska, Northern Canada.
They shine brightly in high altitude sunlight up to two hours after ground level sunset or before dawn. Their unbelievably bright iridescent colours and slow movement relative to any lower clouds make them an unmistakable and unforgettable sight.
aurora australis
fata morgana
some really cool optical illusions/mirages, seen from station accross the ice shelf.
A fata morgana, italian translation of Morgan le Fay, the fairy shapeshifting half-sister of King Arthur, is a mirage, an optical phenomenon which results from a temperature inversion. Objects on the horizon, such as islands, cliffs, ships or icebergs, appear elongated and elevated, like "fairy tale castles".
In calm weather, the undisturbed interface between warm air over cold dense air near the surface of the ground may act as a refracting lens, producing an upside-down image, over which the distant direct image appears to hover. Fata Morgana are usually seen in the morning after a cold night which has resulted in the radiation of heat into space. The first mention of 'Fata Morgana' in English, in 1818, referred to such a mirage noticed in the Strait of Messina, between Calabria and Sicily. It is common in high mountain valleys, such as the San Luis Valley of Colorado where the effect is exaggerated due to the curvature of the floor of the valley canceling out the curvature of the Earth. They may be seen in Arctic seas on very still mornings, or commonly on Antarctic ice shelves.
Fata Morgana are superior mirages, which are distinct from the more common inferior mirages, which create the illusion of distant pools of water in the desert and on hot roads.
(bless you wikipedia!)
A fata morgana, italian translation of Morgan le Fay, the fairy shapeshifting half-sister of King Arthur, is a mirage, an optical phenomenon which results from a temperature inversion. Objects on the horizon, such as islands, cliffs, ships or icebergs, appear elongated and elevated, like "fairy tale castles".
In calm weather, the undisturbed interface between warm air over cold dense air near the surface of the ground may act as a refracting lens, producing an upside-down image, over which the distant direct image appears to hover. Fata Morgana are usually seen in the morning after a cold night which has resulted in the radiation of heat into space. The first mention of 'Fata Morgana' in English, in 1818, referred to such a mirage noticed in the Strait of Messina, between Calabria and Sicily. It is common in high mountain valleys, such as the San Luis Valley of Colorado where the effect is exaggerated due to the curvature of the floor of the valley canceling out the curvature of the Earth. They may be seen in Arctic seas on very still mornings, or commonly on Antarctic ice shelves.
Fata Morgana are superior mirages, which are distinct from the more common inferior mirages, which create the illusion of distant pools of water in the desert and on hot roads.
(bless you wikipedia!)
penguins
arts and crafts show
during november mcmurdo has it's annual arts and crafts fair. the antarctic treaty doesn't allow the sale of any goods produced outside of antarctia; however, anything made here is fair game. a lot of people will get their xmas gifts here.
these are my "badd ass skua bracelets." they're made from broken cargo straps and old boots. a great gig. i spent zero dollars on the materials, so made $18 each. i sold out, and couldn't keep up with all of the orders made afterward.
this year, i'm making plenty way ahead of time.
santarchy
tomato
castle rock hike
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