Geo02 wind

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IN SEARCH OF THE SOURCE OF WIND

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Geo02 wind

  1. 1. www.masocialma.blogspot.in In Search of the Source of Wind
  2. 2. www.masocialma.blogspot.in Role of Wind in the Voyage
  3. 3. www.masocialma.blogspot.in  The Weight of Atmospheric Air on Earth  Gravitational force helps Air to remain on Earth  Variations in the Atmospheric Pressure are the Cause of Wind Atmospheric Pressure
  4. 4. www.masocialma.blogspot.in Variations in Atmospheric Pressure Instrument  Mercury Barometer
  5. 5. www.masocialma.blogspot.in Atmospheric Pressure - Influencing Factors Altitude Humidity Temperature
  6. 6. www.masocialma.blogspot.in
  7. 7. www.masocialma.blogspot.in Altitude & Pressure Altitude Pressure H L Less Amount of Air
  8. 8. www.masocialma.blogspot.in Ooty Paithalmala Brahmagiri Munnar Ponnmudi
  9. 9. www.masocialma.blogspot.in Temperature & Pressure Temperature Pressure L H Air Expands When Heated The Tropical Region Experiences Low Atmospheric Pressure than Colder Region because of the Difference in Temperature
  10. 10. www.masocialma.blogspot.in Humidity Pressure Quantity of Water Present in the Atmosphere is Humidity L H
  11. 11. www.masocialma.blogspot.in Activity 1 ( Answer the Following) 1. Which are the Influencing Factors of Atmospheric Pressure? 2. Find out the Relation between a) Pressure & Altitude b) Pressure & Temperature c) Pressure & Humidity
  12. 12. www.masocialma.blogspot.in Altitude Pressure Temperature Pressure Humidity Pressure Relation with Pressure
  13. 13. www.masocialma.blogspot.in
  14. 14. www.masocialma.blogspot.in If the Atmospheric Pressure of an Area is Higher Lower Than Surroundings High & Low Pressure
  15. 15. www.masocialma.blogspot.in Imaginary Lines Connecting Places Having Equal Atmospheric Temperature  Isotherms
  16. 16. www.masocialma.blogspot.in H L Imaginary Lines Connecting Places Having Equal Atmospheric Pressure  Isobars
  17. 17. www.masocialma.blogspot.in Activity 2 1. Which are the Different Global Pressure Belts? 2. Write Short note on Different Global Pressure Belts
  18. 18. www.masocialma.blogspot.in
  19. 19. www.masocialma.blogspot.in  50 N&S Latitudes  Low Pressure  Sun’s Rays Fall Vertically through out Year  High Temperature  Feeble Winds  ‘Doldrums’  Zone with No Winds Equatorial Low Pressure Belt
  20. 20. www.masocialma.blogspot.in Sub Tropical High Pressure Belt  300 N&S Latitudes  High Pressure  Hot air from Equator Cools here due to Rotation
  21. 21. www.masocialma.blogspot.in
  22. 22. www.masocialma.blogspot.in Sub Polar Low Pressure Belt  600 N&S Latitudes  Low Pressure  Cold air is thrown up due to Rotation
  23. 23. www.masocialma.blogspot.in Polar High Pressure Belt  900 N&S Latitudes  High Pressure  Severe Cold throughout the Year
  24. 24. www.masocialma.blogspot.in Pressure Belt Latitudinal Extent Pressure Features Equatorial Sub Tropical Sub Polar Polar Activity 3 ( Complete the Table)
  25. 25. www.masocialma.blogspot.in Pre. Belt L. Extent Pressure Features Equatorial 50 N&S Low High Temperature Sub Tropical 300 N&S High Air Cools due to Rotation Sub Polar 600 N&S Low Cold air is thrown up Polar 900 N&S High Severe Cold Global Pressure Belts
  26. 26. www.masocialma.blogspot.in Variations in the Amount of Solar Energy Rotation of Earth Basis for Formation of Pressure Belts
  27. 27. www.masocialma.blogspot.in The Pressure Belts Move According to the Apparent Movement of the Sun
  28. 28. www.masocialma.blogspot.in Characteristics  Names based on Direction  Ocean Winds More Moisture
  29. 29. www.masocialma.blogspot.in Activity 4 ( Answer the Following) 1. List the Factors Influencing the Speed and Direction of Wind? 2. Write Short Note on : a) Pressure Gradient Force b) Coriolis Force c) Friction
  30. 30. www.masocialma.blogspot.in Pressure Gradient Force (Speed) Coriolis Effect (Direction) Friction (Speed)
  31. 31. www.masocialma.blogspot.in
  32. 32. www.masocialma.blogspot.in Activity 5 ( Answer the Following) 1. Mark the direction of Winds 2. In which of these situations will the speed of the Wind be higher? Why?
  33. 33. www.masocialma.blogspot.in Pressure Gradient Force  High Speed Wind  Isobars are shown Closely  Less Speed Wind  Isobar s are not shown Closely
  34. 34. www.masocialma.blogspot.in William Ferrel (1817 – 1891) American Meteorologist (Meteorology is the interdisciplinary scientific study of the atmosphere)
  35. 35. www.masocialma.blogspot.in  Freely moving Bodies get Deflected : Right NH Left  SH  Earth’s Rotation is the Reason  Increases as it moves from Equator  Poles  Ferrel’s Law
  36. 36. www.masocialma.blogspot.in
  37. 37. www.masocialma.blogspot.in Winds
  38. 38. www.masocialma.blogspot.in The Wind Formed between the Global Pressure Belts are Planetary Winds 1. Trade Winds 2. Westerlies 3. Polar Easterlies
  39. 39. www.masocialma.blogspot.in  North East Winds N Hemisphere  South East Winds  S Hemisphere  Same Direction & Velocity  Rainfall in Eastern Cost  No Rain in Western-->Desert  Helped Sea Travelers  Subtropical  Equatorial  High pressure  Low
  40. 40. www.masocialma.blogspot.in Subtropical  Subpolar High pressure  Low Westerlies  Direction from West Stronger in S H due to Vast Oceans N Hemisphere S W – N E S Hemisphere N W – S E Different Names  ‘Roaring 40s’, ‘Furious 50s’, ‘Shrieking 60s’
  41. 41. www.masocialma.blogspot.in  Polar– Sub Polar  High pressure – Low  Colder & Stronger  Blow from East in both Hemisphere due to Coriolis Force (Polar Easterlies)  Role in the Climate of  N America, Eastern European Countries & Russia
  42. 42. www.masocialma.blogspot.in Planetary Winds Area they Blow Direction of Wind FeaturesHigh Pressure Low Pressure Northern Hemisphere Southern Hemisphere Trade Winds Westerlies Polar Easterlies Activity 6 ( Complete the Table)
  43. 43. www.masocialma.blogspot.in Planetary Winds Area they Blow Direction of Wind FeaturesHigh Pressure Low Pressure Northern Hemisphere Southern Hemisphere Trade Winds Sub Tropical Equato rial North East South East Same Direction & Velocity Westerli es Sub Tropical Sub Polar South West North West Stronger in S H due to Vast Oceans Polar Easterli es Polar Sub Polar North East South East Colder & Stronger
  44. 44. www.masocialma.blogspot.in Periodic Winds o For a Short Period o At Certain Places o Examples are  Monsoon Winds  Land & Sea Breeze  Mountain & Valley Breeze
  45. 45. www.masocialma.blogspot.in Monsoon Winds  Due to Seasonal Changes  Seasonal Reversal in a year o S W Monsoon Winds o N E Monsoon Winds Formation of Monsoon Winds – Factors  The Apparent Movement of Sun  Coriolis Force  Differences in Heating Hippalus
  46. 46. www.masocialma.blogspot.in Monsoon Winds
  47. 47. www.masocialma.blogspot.in Southwest Monsoon  Sun Northern H  Pressure Belts Shift to North  Summer NH - HTemperature  As SE Trade Wind cross Equator, Deflected (Coriolis Force) and Transform into Southwest Monsoon Northeast Monsoon  Winter HP on Asia & LP on Indian Ocean  Northeast Trade Wind Strengthened & they are Northeast Monsoon Arctic Circle Tropic of Cancer Equator Tropic of Capricorn Antarctic Circle N S Polar HP Polar HP Sub Polar LP Sub Tropical HP Sub Tropical HP Sub Polar LP Equatorial LP June 21 Sep 23 Dec 22 Mar 21 NE Trade Wind SE Trade Wind
  48. 48. www.masocialma.blogspot.in o The Planetary Winds In North European Region blow on the Opposite Direction o Winds are not From the Oceans o Temperature difference between Land & Sea is less N S Polar HP Polar HP Sub Polar LP Sub Tropical HP Sub Tropical HP Sub Polar LP Equatorial LP June 21 Sep 23 Dec 22 Mar 21 NE Trade Wind SE Trade Wind Monsoon Doesn’t Occur in N Europe  Reached Kerala with the help of Monsoon Winds  On Return he went against its Direction & it Troubled him Vasco da Gama
  49. 49. www.masocialma.blogspot.in Activity 7 (Comparison) 1. Make a Comparison Between Southwest & Northeast Monsoon Winds 2. Make a Comparison Between Sea Breeze & Land Breeze 3. Make a Comparison Between Valley Breeze & Mountain Breeze
  50. 50. www.masocialma.blogspot.in Southwest Monsoon Northeast Monsoon Direction  South West  From Indian Ocean  North East  To Indian Ocean Temperature  NH  High  SH  Low (Indian Ocean)  NH  Low  SH  High Pressure  NH  Low  SH  High  NH  High  SH  Low Season  NH  Summer  SH  Winter  NH  Winter  SH  Summer
  51. 51. www.masocialma.blogspot.in L H L H
  52. 52. www.masocialma.blogspot.in Valley Breeze Mountain Breeze Day Time At Night Air in the Valley Heated up & Blows upslope the Mountain Air in the Mountain Cools & Blows towards the valley
  53. 53. www.masocialma.blogspot.in Local Winds  Smaller Locality  Result of Local Pressure Difference  E.g. (India)  Loo, Mango showers, Kalbaisakhi  E.g. (World)  Chinook, Harmattan & Foehn
  54. 54. www.masocialma.blogspot.in Activity 8 Prepare a Table Showing the Name, Region and Specialties of Local Winds Wind Region Specialties Chinook Foehn Harmattan Loo
  55. 55. www.masocialma.blogspot.in Wind Region Specialties Chinook Eastern Slopes of Rockies Mountains  Melting Snow  Reduce Severity of Cold  Wheat Cultivation in Canadian lowlands Foehn Southern Valley of Alps  Reduce Severity of Cold Harmattan Sahara Desert  W Africa  Dry Wind  Humidity & Sultry Conditions Improved Loo North Indian Plains  Hot Wind  Rise in Temperature
  56. 56. www.masocialma.blogspot.in Activity 9 ( Complete the Flow Chart)
  57. 57. www.masocialma.blogspot.in Planetary Winds Local Winds Periodic Winds Trade Winds Westerlies Polar Easterlies Monsoon Winds Land & Sea Breeze Mountain & Valley Breeze Loo Chinook Foehn Harmattan
  58. 58. www.masocialma.blogspot.in Without the Sun’s Energy there would have been Nothing
  59. 59. www.masocialma.blogspot.in Additional Activities 1. Difference between Isotherms & Isobars 2. Name the different Global Pressure Belts 3. What is Inter Tropical Convergence Zone (ITCZ)? 4. Which are the different names Westerly Winds? 5. Explain Doldrum 6. 7. 8. 9. 10.
  60. 60. www.masocialma.blogspot.in www.masocialma.blogspot.in Michael Angelo M.A. MA (Phi.,His.) HSA(Social Science) St. Mary’s H.S. Palliport mamichaelma@gmail.com 9746953695

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