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2009 January
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Picture of the day
A hand-drawn 1943
United States Army
map of world
ocean currents
and
drift ice
, as they were known at the time. An ocean current is continuous, directed movement of
seawater
, like rivers of hot or cold water within the ocean. They are generated from the forces acting upon the water like the
Earth's rotation
, the
wind
, the
temperature
,
salinity
differences and the
gravitation of the moon
.
Map credit:
United States Army
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Wikipedia Picture of the day January 2009