.
Atmosphere
Atmos. turbulences
Ocean and climate
Natural Factors
Climatic and oceanic phenomenas
Photos, videos
Diverse
Simulations...
A jet stream is formed when a warm current from the tropics meets a cold current from the poles. The strong thermal contrast forces the air to flow horizontally and as the Earth rotates, this fast-moving air picks up speed and produces a jet stream. The location of the jet stream denotes the place of the
strongest contrasts of temperatures between different latitudes
on the Earth's surface, thus sharing, or bounding, the cold
air (north) of hot air (south) of jet stream in the Northern
Hemisphere. For example, when the winter is mild in southern
Quebec, it is because the jet stream retreats northward in
Canada, so it is not uncommon, during a severe winter of see
the jet stream plunging down on the Gulf of Mexico and bringing
cold air into the center of the United States. Often, even
within the jet stream, there are areas where the wind is stronger
than around. These regions play an important role in the formation
of precipitation and depressions. Moreover, we note that systems
tend to borrow their trajectory. The jet stream can take directions
towards the north according to the movement of air masses.
Consequently, the strongest jet streams usually occur during
the winter months, when large differences of temperature exist
between low and high latitudes.
A video explaining the formation of Jet-Stream
|
.gif){kind=small}