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The dark clouds over open water have long been used by polar explorers and scientists to navigate in sea ice. For example, Arctic explorer Fridtjof Nansen and his assistant Hjalmar Johansen used the phenomenon to find lanes of water in their failed expedition to the North Pole , as did Louis Bernacchi and Douglas Mawson in Antarctica.
Ship tracks can be seen as lines in these clouds over the Atlantic Ocean on the east coast of the United States, May 11, 2005. Ship tracks are clouds that form around the exhaust released by ships into the still ocean air. [1] Water molecules collect around the tiny particles from exhaust to form a cloud seed. More and more water accumulates on ...
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High clouds having the traditional "mare's tail" appearance. These clouds are long, fibrous, and curved, with no tufts or curls at the ends. Cirrus uncinus (V-2) Filaments with up-turned hooks or curls. Cirrus spissatus (V-3) Dense and opaque or mostly opaque patches. Cirrus castellanus (V-4) A series of dense lumps, or "towers", connected by a ...
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