Disclaimer 8. Favorite Answer. The westerlies become more vigorous in the southern hemisphere because of lack of land and dominance of oceans. Anticyclones are produced due to subsidence of air currents in the horse latitudes. They are so large and massive that they can change Earth's climate conditions. It may be stated that the trade winds are more regular and constant over the oceans than over the lands. in the northern hemisphere and N.W. On an average, there is westerly air circulation (form west to east) in the doldrums or say in the intertropical convergence. Report a Violation 10. The strongest winds seen on a planet in our solar system are on Neptune and Saturn.. Short bursts of fast winds are called gusts.Strong winds that go on for about one minute are called squalls. The winds regularly blow throughout the year confined within latitudinal belts, mainly in north-east and south-east directions or from high-pressure polar-regions to low-pressure regions. It has been discovered that trade winds blow with regularity only over some parts of the tropical oceans (mainly over the eastern parts). Uploader Agreement, Seasonal Shifting of Wind Belts | Climatology | Geography, Classification of Pressure Belts: 4 Categories | Climatology | Geography, Factors Affecting Wind Motion and Classification of Winds, Tri-Cellular Meridional Circulation of the Atmosphere | Climatology | Geography, Temperature of Oceanic Water | Oceans | Geography, International Tourism in India: Introduction, History, Trends, Opportunities and Future, Forestry: Definition, Branches, Costs, Programme and Conclusion | Geography, Contribution of Russia to World Geography (In Hindi), French Scholars and their Contribution to Geography in Hindi. Planetary winds: The primary winds are known as Planetary winds. Terms of Service 7. These are of three types: i) Trade winds. This Blog consists of data, information, paragraph,direct writings of geography stuffs collected from various sources. SAMPLE QUESTION â¢The seasonal shifts of Earthâs planetary wind and moisture belts are due to changes in the 1) Distance between Earth and the Sun 2) Amount of energy given off by the Sun 3) Latitude that receives the Sunâs vertical rays* 4) Rate of Earthâs rotation ⦠Planetary winds produce surface ocean currents. Slow-moving oceanic Rossby waves are are fundamentally different from ocean surface waves. Wind is the flow of gases.On Earth, wind is mostly the movement of air.In outer space, solar wind is the movement of gases or particles from the sun through space. 9 years ago. Monsoons are the best example of large-scale modification of the planetary wind system. (1) the planetary winds, (2) the monsoon winds, (3) cyclones and anticyclones (4) local winds. The equatorial westerlies are associated with strong atmospheric disturbances (cyclonic storms). On the other hand, winds with seasonal changes in their directions are called seasonal winds (e.g., monsoon winds). This belt of low pressure is more persistent in summer season but generally disappears in winter season. Thus, this zone (30°- 35°) is characterized by weak and variable winds and calm. Account Disable 11. This is why hot and dry tropical deserts are found in the western parts of the continents within the latitudinal zones of 20°-30° in both the hemispheres (e.g. a. revolution around the Sun. d. tilted axis. DIRECT DOWNLOAD! In a continuous 1,800 ⦠The winds blowing almost in the same direction throughout the year are called prevailing or permanent winds. Spanning somewhat smaller, yet large distances of a few hundred to several thousand kilometers, are synoptic scale weather systems. Consequently, winds blow from high pressure belts to low pressure belts. Global Wind Explained. At some places on the lands (e.g. The general direction of the westerlies is S.W. Atmospheric Circulation, Climatology, Geography, Planetary Winds, Winds. Their velocity increases southward and they become stormy. Trade winds blow in a belt lying between 5°N-30°N in the northern hemisphere and 5°S-30°S in the southern hemisphere. On an averages, the location of high and low pressure belts is considered to be stationary on the globe (though they are seldom stationary). It must be noted that not all the western coast of the temperate zone (30* – 60*) receive Westerlies throughout the year due to shifting of wind belts coz of earth’s inclination. 35.9). Indo-Pacific Doldrum extending from the eastern coast of Africa to 180° longitude for a distance of 16,000 km and covering an area of 25,800,000 km2, thus, covers about one third of the total length of the equator, (2) Equatorial Western Coastal Region of Africa, and. Winds blowing from polar high to sub polar low pressure belt, Are very cold in nature as originate in polar areas & do not cause much rainfall, These winds give birth to cyclones when they come in contact with westerlies, Brings frequent change in weather conditions & causes heavy rainfall. The north-east and south-east trades converge along the equator and there are upper air antitrades blowing in the opposite directions of the surface trade winds. The wind belts are basically controlled by the latitudinal pressure belts and by the forces produced by rotation of the earth. There is much variation in the weather conditions in their poleward parts where there is convergence of cold and denser polar winds and warms and lighter westerlies. Other articles where Planetary wind system is discussed: Pacific Ocean: Climate: â¦Pacific conform closely to the planetary systemâthe patterns of air pressure and the consequent wind patterns that develop in the atmosphere of the Earth as a result of its rotation (Coriolis force) and the inclination of its axis (ecliptic) toward the Sun. Also known as brave winds or roaring forties, furious fifties & shrieking sixties according to the varying degree of storminess in the latitudes in which they blow. shwetlana3026 shwetlana3026 The deflection of earth's planetary winds is an example of corioles effect which is created by revolution of the earth Astronomers present an explanation for the mesmerizing shapes of planetary nebulae. This belt of calm is very popularly known as horse latitudes because of the fact that in ancient times the merchants had to throw away some of the horses being carried in the ships in-order to lessen the weight so that the ships could be sailed through the calm conditions of these latitudes. It may be pointed out that the zone of trade winds is called Hadely Cell on the basis of the convective model prepared by Hadley for the entire earth. The dynamically induced (due to subsidence of air currents) subtropical high pressure belt extends between 30°-35° (25°-35°) latitudes in both the hemispheres. These views of weather conditions prevailing in the tropics are now considered as old concepts and have now been refuted on the basis of new information based on numerous observations made in the upper air and near the earth’s surface during and after Second World War. Feedback from star-formation, in the form of supernova explosions of massive stars, stellar winds or ultraviolet radiation from massive stars, or outflows from low-mass stars may disrupt the cloud, destroying the nebula after several million years. Examples of planetary-scale phenomena include the semipermanent pressure centres discussed above and certain globe-encircling upper-air waves (see below Upper-air waves). 35.7). The western parts of subtropical anticyclones (covering the eastern parts of the continents and western parts of the oceans) are humid because some sort of atmospheric instability is caused due to weakening of air descent (e.g., in the areas of Caribbean Sea, Mexican Gulf and adjoining areas, eastern China, southern Japan, south-east Brazil and eastern Australia). See the equator zone, 00 Divergent wind zones are where wind belts are moving away from each other. This type of gas loss from a planet into space is known as planetary wind. The Earth's planetary winds are deflected as a result of the Earth's? âYet winds are just screaming around the planet. They are tropical easterly or trade winds, westerlies and polar easterlies. to N.E. Information, data, figures are collected from various Sources. Explain how local winds are different from planetary winds. See more. Answer Save. Planetary Winds Planetary winds comprise winds distributed throughout the lower atmosphere. 3Radebaugh1, L. Kerber2, R. Harvey3, J. Karner4, ... winds are typical for the Antarctic plateau, so as the storm moved out, the winds resumed and blew the snows, often with the texture of small, sand-like ice c. rotation. Formerly, it was believed that trade winds blow from the subtropical high pressure belts to the equatorial low pressure belt. Thus, the general characteristic features of the westerlies are largely modified due to cyclones and anticyclones associated with them. The Earth's atmospheric circulation varies from year to year, but the large-scale structure of its circulation remains fairly constant. : (1) over the tropic of Cancer, 21 June) and comes back to its normal position on Sept. 23 and then shifts southward at the time of winter solstice (when the sun is vertical over the tropic of Capricorn, 22 December). On Earth, winds get faster as you get higher in the atmosphere. Other examples of periodic winds include land and sea breeze, mountain and valley breeze, cyclones and anticyclones, and air masses. Planetary wind definition is - one of the major winds. It is also apparent that the subtropical high pressure belt is the source for the origin of trade winds (blowing towards equatorial low pressure belt) and westerlies (blowing towards sub-polar low pressure belt) because winds always blow from high pressure to low pressure. Planetary winds: Planetary or permanent winds blow in the same direction throughout the year. A belt of low pressure, popularly known as equatorial trough of low pressure, extends along the equator within a zone of 5°N and 5°S latitudes. Flohn has further maintained that south-western monsoons are, infact, equatorial westerlies because these winds are extended upto 30-35°N latitudes over Indian subcontinent due to northward shifting of NITC at the time of summer solstice (fig. Image Guidelines 4. Thus, such winds are called permanent winds. The equatorial or tropical fronts are called intertropical fronts (ITF) or intertropical convergence (ITC). The air after being heated near the equator ascends and after blowing in opposite direction to the surface trade winds descends in the latitudinal zone of 30°-35°. Powered by, https://www.affairscloud.com/assets/uploads/2016/04/wind.png, Planetary Winds: Their Types and Definition. Winds blowing from subtropical high pressure area to equatorial low pressure area (Extremely steady winds), Since they travel from high latitude to low latitude area, they become gradually hot & dry and hence have a great capacity to hold moisture, They cause considerable rainfall on eastern margins of the continents as they get moisture after blowing over oceans, These winds converge near equator & form ITCZ, Here these winds rises & causes heavy rainfall, Winds blowing from subtropical high pressure belts towards subtropical low pressure belts, Blow from S – W to N – E under Coriolis effect in N – Hemisphere & from N – W to S – E in S – Hemisphere, Blow from lower latitudes to higher latitudes, Cause considerable rainfall particularly on western margins of the continents, More consistent in direction & blow with stronger force in S – Hemisphere due to lesser obstructions from continents. A few meteorologists and climatologists believe in the existence of cyclonic fronts in the equatorial regions while some refute this concept on the ground that fronts are formed only when two air masses of contrasting temperatures converge but such conditions are not found in the equatorial region. In fact, the belt of doldrum shifts northward during summer solstice (when the sun is vertical (fig. â¦phenomena is known as the planetary scale. In fact, a cyclonic front, called as polar front, is formed due to two contrasting air masses as referred to above and thus temperate cyclones are originated. This is why the anticyclonic conditions cause atmospheric stability, dry condition and very weak air circulation. Similar to the solar wind, the planetary wind is composed of light gases that escape planetary atmospheres. Planetary Winds: The winds blowing throughout the year from one latitude to another in response to ⦠According to Ferrel’s law (based on coriolis force generated by the rotation of the earth) trade winds are deflected to the right in the northern hemisphere and to the left in the southern hemisphere. They are also associated with boisterous-gales. Lv 5. Thus, this belt separates two wind systems viz., trade winds and westerlies. Plagiarism Prevention 5. New discoveries have now put question marks against the views of zonal character and regularity of surface trade winds, uniformity of weather conditions in the tropics, and upper air antitrade winds. There is more or less regular inflow of winds from subtropical high pressure belts to equatorial low pressure belt. The zone of polar winds shrinks due to northward shifting of pressure belts at the time of northern summer (summer solstice) in the northern hemisphere but it is extended up to 60°N latitude during northern winter (winter solstice). On the other hand, the equator-ward parts of the trade winds are humid because they are characterized by atmospheric instability and much precipitation as the trade winds while blowing over the oceans pick up moisture. The direction of such winds remains more or less the same throughout the year though their areas change seasonally. Giving examples, highlight the role of local winds in influencing climate, agriculture and livelihood in various regions. The northern and southern boundaries of intertropical convergence are called north intertropical convergence (NITC) and south intertropical convergence (SITC) respectively (fig. J. Add your answer and earn points. Topic: Salient features of worldâs physical geography. 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