where does jet stream come from?
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Jet streams form when warm air masses meet cold air masses in the atmosphere. The Sun doesn't heat the whole Earth evenly. That's why areas near the equator are hot and areas near the poles are cold.
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Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere. The winds blow from west to east in jet streams but the flow often shifts to the north and south. ... Recall from the previous section what the global wind patterns would be like if the earth was not rotating.
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Normally clouds move anywhere from 30 to 40 mph. And in a thunderstorm to over 100 mph when caught in a jet stream. Cloud speed varies depending on weather, altitude, the type of cloud and other factors.
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During the summer the jet stream is usually to the North of the UK allowing high pressure from the atlantic to move in.
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Jet is a product of high-pressure decomposition of wood from millions of years ago, commonly the wood of trees of the family Araucariaceae. Jet is found in two forms, hard and soft. Hard jet is the result of carbon compression and salt water; soft jet is the result of carbon compression and fresh water.
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The mild conditions this winter are driven by a "positive phase" of the Arctic Oscillation, which strengthens the jet stream, a ribbon of fast-moving air that flows west to east over the Northern Hemisphere. Changes in the jet stream's behavior can have a profound impact on weather systems around the world.
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Jets leave white trails, or contrails, in their wakes for the same reason you can sometimes see your breath. The hot, humid exhaust from jet engines mixes with the atmosphere, which at high altitude is of much lower vapor pressure and temperature than the exhaust gas.
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Jet boats may have one or two engines and jet pumps. ... Because the entire jet drive system is located within the hull, a jet boat has minimal draft and can operate in very shallow water—there's no propeller or outdrive that could be damaged by hitting bottom.
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The Gulf Stream is an intense, warm ocean current in the western North Atlantic Ocean. It moves north along the coast of Florida and then turns eastward off of North Carolina, flowing northeast across the Atlantic.
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Why do jets leave a white trail in the sky? Jets leave white trails, or contrails, in their wakes for the same reason you can sometimes see your breath. The hot, humid exhaust from jet engines mixes with the atmosphere, which at high altitude is of much lower vapor pressure and temperature than the exhaust gas.
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A waterjet works by generating a propulsive thrust, created when water is forced or 'sucked in' to the Jet unit and forced out, propelling the boat forward. This differs from a normal motor boat, where a propeller is attached to the stern of the boat, requiring a deeper amount of water to operate.
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Jet streams are located about five to nine miles above Earth's surface in the mid to upper troposphere — the layer of Earth's atmosphere where we live and breathe. Airplanes also fly in the mid to upper troposphere.
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The pump draws water from an intake in the bottom of the boat and shoots a high-velocity stream of water from a nozzle at the back of the boat to propel it forward. Jet boats may have one or two engines and jet pumps. The boat is steered by a movable nozzle that aims the stream of water left or right.
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Point sources come from discrete pipes flowing into a river for example. Non- point are more diffuse sources that don't come from one single pipe or outlet.
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The dark, open ocean absorbs more heat than reflective ice, causing a hot spot, she told the New York Times. She argues this hot spot, along with changes in the jet stream driven by climate change, could cause the polar vortex to break down.
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Polar jet stream At high latitudes, lack of friction allows air to respond freely to the steep pressure gradient with low pressure at high altitude over the pole. This results in the formation of planetary wind circulations that experience a strong Coriolis deflection and thus can be considered 'quasi-geostrophic'.
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Jet streams are fast flowing, narrow, meandering air currents in the atmospheres of some planets, including Earth. On Earth, the main jet streams are located near the altitude of the tropopause and are westerly winds (flowing west to east). Their paths typically have a meandering shape.