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Pressure Belts and Winds - Climatology
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Various pressure belts exists on the surface of the earth and there are wind system which develops as a result of pressure gradient. Both, pressure belt and wind system has between explained by Bhanwar in this lesson.

Bhanwar Singh
Ex- National Defence Academy (115 Course) Cleared Civil Services Examination, 2012

U
Unacademy user
✌️👌✌️👌 awesome lecture
Not explain the Pressure Belt .. All about it ..... very Poor video👎
sir u are not explain some point like Coriolis force , because some people have not knowledge about some point like me
hi it would be great if you make this winds on world map and let us know which are cold and which are hot , especially the last slide
sir how sub tropical high pressure belt is formed due to the subsidence of air from high altitude..I cant understand this.can you please explain.
you are teaching anything.. just reading waste of time
  1. CRASH COURSE-WORLD GEOGRAPHY Presented by - Bhanwar Singh Sirohi


  2. CLIMATOLOGY-PRESSURE BELTS AND WINDS


  3. ABOUT ME BA. (Hons) in Law from Awadh University I Defence Academy (115 Course) Cleared Civil Services Examination, 2012 Hobbies - Writing Poetry Course Fee Contribute Follow me on Unacademy at: https://unacademy.in/user/sirohib


  4. ATMOSPHERIC PRESSURE The weight of a column of air d in a unit area from the mean sea I to the top of the atm expressed in units of millibar (mb) a Barometer Instrument used to measure the atmospheric pressure Pressure Gradient-Rate of change of pressure per unit of horizontal distance Isobars Imaginary lines which connect the places of equal atmospheric pressure Distribution of pressure is controlled by altitude, temperature, rotation of the earth, water vapour content, circulation of air among others Pressure decreases with average rate of about 34 mb for every 300 meters of height


  5. PRESSURE BELTS Zone of High Pressure and Low Pressure over the Earth are called Pressure Belts They are discontinuous in Northern Hemisphere but are found more or less in continuous zones in the Southern Hemisphere There are seven pressure belts on the globe Causes of Pressure Changes Thermal Factor Conduction and Radiation Horizontal Advection of warm and cold air masses Latent Heat of Condensation a Dynamic Factor Frictional Drag Centrifugal Force


  6. PRESSURE BELTS EQUITORIAL LOW PRESSURE BELT UB-POLAR LOW PRESSURE Located on either side of equator from 5 N to 5 S latitudes North-East and South- East Trade winds converge here Also known as Doldrums or Belt of Calm SUB-TROPICAL HIGH PRESSURE SUB-TROPICAL HIGH PRESSURE UB-POLAR LOW PRESSURE


  7. PRESSURE BELTS SUBTROPICAL HIGH PRESSURE BELT UB-POLAR LOW PRESSURE Extends between 300 to 35 latitudes in both the hemisphere SUB-TROPICAL HIGH PRESSURE a The belt is formed due to subsidence of air from higher altitudes Characterised by anti- cyclonic conditions Called Horse Latitudes SUB-TROPICAL HIGH PRESSURE SUB-POLAR LOW PRESSURE


  8. PRESSURE BELTS SUB-POLAR LOW PRESSURE BELT UB-POLAR LOW PRESSURE Extends from 60 to 65 in both the hemisphere SUB-TROPICAL HIGH PRESSURE a More developed and regular in Southern Hemisphere This belt is dynamically induced due to the effect of Coriolis Force SUB-TROPICAL HIGH PRESSURE UB-POLAR LOW PRESSURE


  9. PRESSURE BELTS POLAR HIGH PRESSURE UB-POLAR LOW PRESSURE BELT Extends from 800 to 85 in both the hemisphere High pressure develops due to prevalence of very low temperature throughout the year SUB-TROPICAL HIGH PRESSURE SUB-TROPICAL HIGH PRESSURE UB-POLAR LOW PRESSURE


  10. ASSOCIATED PHENOMENON SHIFTING OF WIND BELTS There is apparent movement of the Sun towards North and South There is also opposite nature of the heating and cooling of land and water CORIOLIS FORCE The air doesn't move in a straight path because of spinning of earth on its axis. The rotation causes air masses to be deflected It is absent at equator but increases in strength towards the pole FERREL'S LAW The deflection of wind is towards right in the northern hemisphere and towards left in the southern hemisphere