amazing clouds - not photos hopped
TRANSCRIPT
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Amazing Clouds - Not
Photoshopped
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Nacreous Clouds
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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 have iridescent
colours but are higher and much rarer than ordinary
iridescent clouds. They are seen mostly but not exclusively
in polar regions and in winter at high latitudes, Scandinavia,Alaska, Northern Canada. Lower level iridescent clouds
can be seen anywhere shine brightly in high altitude
sunlight up to two hours after ground level sunset or before
dawn. Their unbelievably bright iridescent colours and slowmovement relative to any lower clouds make them an
unmistakable and unforgettable sight
Nacreous Clouds
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Altocumulus Castelanus
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Also known as jellyfish clouds due to theirjellyfish-like appearance.These formed
around 17,000 ft due to when the rush of
moist air comes from the Gulf Stream andgets trapped between layers of dry air. The
top of the cloud rises into a jellyfish shape
and long tentacles known as trailing virga
form from rain drops that have evaporated.
Altocumulus Castelanus
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Noctilucent Clouds
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Noctilucent Clouds or Polar Mesopheric
Clouds: This is an extroadinarily rare cloud
formation that occurs out on the verge of
space between 82km to 102 km from the
earths surface.Noctilucent clouds appear tobe luminous yet they reflect the sunlight
from the other side of the earth at night,
giving them a glowing appearance
Noctilucent Clouds
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Mammatus Clouds
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Mammatus are pouch-like cloud
structures and a rare example of cloudsin sinking air.Sometimes very ominous
in appearance, mammatus clouds are
harmless and do not mean that atornado is about to form - a commonly
held misconception. In fact, mammatus
are usually seen after the worst of a
thunderstorm has passed.
Mammatus Clouds
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Mushroom Clouds
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A mushroom cloud is a distinctive mushroom-shaped cloud of smoke,
condensed water vapor, or debris resulting from a very large explosion.
They are most commonly associated with nuclear explosions, but any
sufficiently large blast will produce the same sort of effect.Volcano
eruptions and impact events can produce natural mushroom
clouds.Mushroom clouds form as a result of the sudden formation of a
large mass of hot low-density gases near the ground creating a
Rayleigh-Taylor instability. The mass of gas rises rapidly, resulting inturbulent vortices curling downward around its edges and drawing up a
column of additional smoke and debris in the centre to form its stem.
The mass of gas eventually reaches an altitude where it is no longer
less dense than the surrounding air and disperses, the debris drawn
upward from the ground scattering and drifting back down.
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Cirrus Kelvin-Helmholtz
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Appearing as a slender, horizontalspiral of cloud, cirrus Kelvin-Helmholtz
is one of the most distinctive cloud
formations. However, it tends todissipate only a minute or two after
forming and, as a result, is rarely
observed.Average height is around16,500 ft.
Cirrus Kelvin-Helmholtz
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Lenticular Clouds
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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.Where stable moist air flows over a
mountain or a range of mountains, a series of
large-scale standing waves may form on the
downwind side. Lenticular clouds sometimes form
at the crests of these waves. Under certain
conditions, long strings of lenticular clouds canform, creating a formation known as a wave cloud.
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Roll Clouds
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A roll cloud is a low, horizontal tube-shaped arcus
cloud associated with a thunderstorm gust front, or
sometimes a cold front. Roll clouds can also be asign of possible microburst activity.Cool air sinking
air from a storm clouds downdraft spreads out
across the surface with the leading edge called a
gust front. This outflow undercuts warm air being
drawn into the storms updraft. As the cool air lifts
the warm moist air water condenses creating
cloud, which often rolls with the different windsabove and below (wind shear).
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Shelf Clouds
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A shelf cloud is a low, horizontal wedge-
shaped arcus cloud, associated with a
thunderstorm gust front (or occasionally witha cold front, even in the absence of
thunderstorms).Unlike a roll cloud, a shelf
cloud is attached to the base of the parentcloud above it (usually a
thunderstorm).Rising cloud motion often can
be seen in the leading (outer) part of the
shelf cloud, while the underside often
appears turbulent, boiling, and wind-torn.
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Stratocumulus Clouds
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