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Ocean Currents, El Nino & La Nina- Oceanography
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In this lesson Bhanwar has explained the ocean currents, their effect, classification and various oceanic currents of Pacific, Atlantic and Indian ocean. He has also briefly explained El Nino and La Nina.

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

Unacademy user
Excellent teaching mam
Iam sorry but you are just reading without any explanations
thank you sir !!@@!@!!!!
thank you sir !!!@@@!!
  1. CRASH COURSE-WORLD GEOGRAPHY Presented by - Bhanwar Singh Sirohi


  3. OCEAN CURRENTS ltis the movement of oceanic water in a fairly defined direction under the influence of various forces Primary means of transport of oceanic heat Ekman's Spira 1-Structure of currents or winds near a horizontal boundary due to Coriolis Effect Factors effecting Ocean Currents Atmospheric M vement Variation in Temperature Coriolis Effect Salinity Depth of sea or oceanic basin Size and Shape of the sea or ocean

  4. CLASSIFICATION OF OCEAN CURRENT It is classified in three divisions on the basis of velocity, dimension and direction Currents Drifts Streams Currents-lt is the movement of oceanic water in a definite direction with greater velocity Drift-forward movement of surface water of the oceans under the influence of prevailing winds Stream-movement of large mass of ocean's water in a definite direction with greater velocity than the drifts and the currents

  5. EFFECT OF OCEAN CURRENTS Modify local weather conditions Desertification caused by Cold currents Determines monsoon of Indian sub-continent May help in generating electric power Helps in maintaining the temperature balance of ocean's water Precipitation in the coastal areas effected by warm currents Distributes nutrients, oxygen and other elements Determine major navigational routes in ancient times Meeting up of cold and warm ocean currents produce major fishing ground:s rature balance of ocean's water

  6. CURRENTS OF PACIFIC OCEAN Currents North Equitorial Tsushima Kuroshio Oyashio British Columbian or Alaskan Warm California South Equitorial East Australian West Wind Drift Nature Varm 30 N Kuroshio Warm Cold North Equator tornal cc Cold 3amn Warm Cold Cold 30 S ntarcecer urnpola 60 S Peru or Humboldt 90 S 135 E 180 135 w 90 V CURRENTS OF PACIFIC OCEAN

  7. CURRENTS OF ATLANTIC OCEAN Curre nts North Equitorial St. Antilles Florida Gulf Stream or Cold Wal Warm Labrador East Greenland Renel Norwegian Canary South Equitorial Brazil Falkland West Wind Drift Benguela Nature Warm Warm Warm 60 N Strean 30 N Cold Cold Warm Warm Cold Warm Warm Cold Cold Cold 30 S 90 S 90 w 45 w Oo CURRENT OF ATLANTIC OCEAN

  8. CURRENTS OF INDIAN OCEAN 90 N Currents Sout Mozambique Agulhas West Australian Monsoon Drift Nature h Equatorial Warm Warm Warmn 30 N Cold Warm 60 S 45 E 9O E CURRENTS OF INDIAN OCEAN

  9. GLOBAL OCEAN CURRENTS ashio abrador Ala ska N. Atlantic Drift N. Pacifc N. Pacife Gulf Stream Canary California N.Equstorial Equatoriai Counter North Equatorial N. Equatorial N. Equatorial Equatorial S. Equatorial Equatorial Counter ounter South Equatorial South Equatorial W Australa peru Brazil Australia Mozambique S outh Pacifc Atlantic Antarctic Circum polar Antarctk crcum Antarctc Subpola Antarctic Subpola

  10. EL NINO AND LA NINA LA NINA-It is cold sub-surface current in the Pacific ocean off the EL NINO-It is warm sub-surface current in the Pacific ocean off the El Nino in the winter suggests a strong walker circulation in the INDIAN OCEAN DIPOLE (IOD)-Also known as Indian Nino is Peruvian coast Peruvian coast following summer, which results in a weak monsoon in India irregular oscillation of sea-surface temperatures in which western Indian ocean becomes alternately warmer and then colder than the eastern part of the ocean