Global Convection Currents
- Global Convection Currents
Global convection currents are one of the many forms of convection here on Earth, they are a form of small to high speed winds. These winds can be anything from a few knots to winds in the 80-100 knot range. These winds are caused by natural convection currents. These convection currents are caused by a difference in pressure and heat in the tropical and Antarctic/Arctic areas on the earth.
Convection Currents
Convection is the internal movement of currents within fluids (i.e. liquids and gases). It cannot occur in solids due to the particles not being able to flow freely. The most common cause of internal movement is a variation in density due to a transfer of heat. Other sources of density variations, such as variable composition (for example, salinity), or from the application of an external motive force are also often causes. Current movement may be invisibly slow, or it may be as fast as a tornado or twister. Convection occurs in atmospheres, oceans, and planetary mantles.
Travel
Although not as strong as the Westerlies and Easterlies over the Atlantic, these winds are fantastic for travel coming from north to south or visa-versa. These winds can be traveled along increasing plane speed and hence decreasing the travel time.
Resources
Prentice Hall>>Science Explorers: Earth Science [http://www.pearsonsuccessnet.com] º
º must have registration or password and username.
Wikimedia Foundation.
2010.
Look at other dictionaries:
Convection — This figure shows a calculation for thermal convection in the Earth s mantle. Colors closer to red are hot areas and colors closer to blue are cold areas. A hot, less dense lower boundary layer sends plumes of hot material upwards, and likewise,… … Wikipedia
Global climate model — AGCM redirects here. For Italian competition regulator, see Autorità Garante della Concorrenza e del Mercato. Climate models are systems of differential equations based on the basic laws of physics, fluid motion, and chemistry. To “run” a model,… … Wikipedia
Mantle convection — Earth cross section showing location of upper and lower mantle … Wikipedia
climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… … Universalium
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
Plate tectonics — The tectonic plates of the world were mapped in the second half of the 20th century … Wikipedia
earth — /errth/, n. 1. (often cap.) the planet third in order from the sun, having an equatorial diameter of 7926 mi. (12,755 km) and a polar diameter of 7900 mi. (12,714 km), a mean distance from the sun of 92.9 million mi. (149.6 million km), and a… … Universalium
cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… … Universalium
iceberg — /uys berrg/, n. 1. a large floating mass of ice, detached from a glacier and carried out to sea. 2. Informal. an emotionally cold person. 3. Australian Informal. a person who swims or surfs regularly in winter. 4. tip of the iceberg, the first… … Universalium
Aurora (astronomy) — Aurora Borealis redirects here. For other uses, see Aurora Borealis (disambiguation). Aurora Australis redirects here. For the ship, see Aurora Australis (icebreaker). For the book, see Aurora Australis (book). Northern lights redirects here. For … Wikipedia
