Definitions for jet stream
jet stream

Princeton's WordNetRate this definition:0.0 / 0 votes

1. jet streamnoun

   a high-speed high-altitude airstream blowing from west to east near the top of the troposphere; has important effects of the formation of weather fronts

WiktionaryRate this definition:4.0 / 1 vote

1. jet streamnoun

   any of the high-speed, high-altitude air currents that circle the Earth in a westerly direction

WikipediaRate this definition:0.0 / 0 votes

1. Jet stream

   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. Jet streams may start, stop, split into two or more parts, combine into one stream, or flow in various directions including opposite to the direction of the remainder of the jet. The strongest jet streams are the polar jets, at 9–12 km (30,000–39,000 ft) above sea level, and the higher altitude and somewhat weaker subtropical jets at 10–16 km (33,000–52,000 ft). The Northern Hemisphere and the Southern Hemisphere each have a polar jet and a subtropical jet. The northern hemisphere polar jet flows over the middle to northern latitudes of North America, Europe, and Asia and their intervening oceans, while the southern hemisphere polar jet mostly circles Antarctica all year round. The southern hemisphere mid-latitude jet is a relatively narrow band of strong winds stretching from the Earth's surface to the top of the troposphere at about 12 km increasing steadily in strength with height.Jet streams are the product of two factors: the atmospheric heating by solar radiation that produces the large-scale Polar, Ferrel, and Hadley circulation cells, and the action of the Coriolis force acting on those moving masses. The Coriolis force is caused by the planet's rotation on its axis. On other planets, internal heat rather than solar heating drives their jet streams. The Polar jet stream forms near the interface of the Polar and Ferrel circulation cells; the subtropical jet forms near the boundary of the Ferrel and Hadley circulation cells.Other jet streams also exist. During the Northern Hemisphere summer, easterly jets can form in tropical regions, typically where dry air encounters more humid air at high altitudes. Low-level jets also are typical of various regions such as the central United States. There are also jet streams in the thermosphere. Meteorologists use the location of some of the jet streams as an aid in weather forecasting. The main commercial relevance of the jet streams is in air travel, as flight time can be dramatically affected by either flying with the flow or against, which results in significant fuel and time cost savings for airlines. Often, the airlines work to fly 'with' the jet stream for this reason. Dynamic North Atlantic Tracks are one example of how airlines and air traffic control work together to accommodate the jet stream and winds aloft that results in the maximum benefit for airlines and other users. Clear-air turbulence, a potential hazard to aircraft passenger safety, is often found in a jet stream's vicinity, but it does not create a substantial alteration on flight times.

ChatGPTRate this definition:0.0 / 0 votes

1. jet stream

   A jet stream is a narrow band of fast-flowing, predominantly westerly air currents in the upper atmosphere, specifically in the troposphere and lower stratosphere. They can reach speeds of over 200 miles (320 kilometers) per hour. Jet streams are caused by a combination of Earth's rotation and atmospheric heat and they significantly influence the path and intensity of storms and other weather patterns.

WikidataRate this definition:5.0 / 2 votes

1. Jet stream

   Jet streams are fast flowing, narrow air currents found in the atmospheres of some planets, including Earth. The main jet streams are located near the tropopause, the transition between the troposphere and the stratosphere. The major jet streams on Earth are westerly winds. Their paths typically have a meandering shape; jet streams may start, stop, split into two or more parts, combine into one stream, or flow in various directions including the opposite direction of most of the jet. The strongest jet streams are the polar jets, at around 7–12 km above sea level, and the higher and somewhat weaker subtropical jets at around 10–16 km. The Northern Hemisphere and the Southern Hemisphere each have both a polar jet and a subtropical jet. The northern hemisphere polar jet flows over the middle to northern latitudes of North America, Europe, and Asia and their intervening oceans, while the southern hemisphere polar jet mostly circles Antarctica all year round. Jet streams are caused by a combination of a planet's rotation on its axis and atmospheric heating. Jet streams form near boundaries of adjacent air masses with significant differences in temperature, such as the polar region and the warmer air towards the equator.

Editors ContributionRate this definition:0.0 / 0 votes

1. jet stream

   A type of air current.

   Jet streams are caused by a combination of a planet's rotation on its axis and atmospheric heating (by solar radiation and, on some planets other than Earth, internal heat). Jet streams form near boundaries of adjacent air masses with significant differences in temperature, such as the polar region and the warmer air towards the equator.

   
   

   Submitted by MaryC on December 19, 2015  

Matched Categories

1. • Airstream

How to pronounce jet stream?

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How to say jet stream in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of jet stream in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of jet stream in Pythagorean Numerology is: 3

Examples of jet stream in a Sentence

1. Jason Furtado:

   When the polar vortex is weak, or an SSW event occurs, then the jet stream will tend to weakened, move further south, and become' wavier,' the effect of these changes is for warmer than normal air to move into the Arctic Amplification, colder weather to enter North America and Europe/Asia, and more extreme weather and storms overall in the middle latitudes( e.g., snowstorms).

2. Jason Furtado:

   In the stratosphere, the polar vortex typically recovers in strength within a couple of weeks of the peak of the event, however, in the troposphere, the effects of the SSW event( e.g., a further south jet stream, cold and stormy weather) can last for up to 8 weeks. So, these events, which can evolve quickly, can have lasting impacts on the winter weather patterns in the troposphere.

3. Sam Lillo:

   In general, the forecasts are showing ridging with above-normal temperatures in the South, cooler to the north, and that temperature gradient enhancing the jet stream across the center of the Sam Lillo.

4. Jason Furtado:

   When the stratospheric polar vortex is strong, the jet stream tends to move further north, which keeps the cold air in the Arctic Amplification and allows relatively milder conditions across much of the United States and Eurasia.

5. Thomas Mote:

   Changes in sea ice influence ocean currents and the jet stream in ways that can affect weather in lower latitudes, including the United States and Europe.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=jet stream
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Jet_Stream
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Jet_Stream
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=jet stream