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Monsoons

Monsoons. A seasonally varying wind Created by a continental scale sea breeze Famously, the NE & SW Monsoons over the Indian subcontinent Other monsoons exist (American monsoon) Seasonal monsoon winds change circulation in the Indian Ocean (Somali Curent). Sea Breezes. Sea Breezes.

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Monsoons

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  1. Monsoons • A seasonally varying wind • Created by a continental scale sea breeze • Famously, the NE & SW Monsoons over the Indian subcontinent • Other monsoons exist (American monsoon) • Seasonal monsoon winds change circulation in the Indian Ocean (Somali Curent)

  2. Sea Breezes

  3. Sea Breezes

  4. Monsoon Processes

  5. Monsoon Processes SW Monsoon NE Monsoon Summer Winter

  6. Monsoon Winds SW Monsoon NE Monsoon

  7. Monsoon Winds SW Monsoon NE Monsoon

  8. Position of the Low Level Jet

  9. Features of Indian Monsoon • Coastline borders largest land mass on planet & near the tropics • Himalayas focus winds & create orographic rains • Glacial storage of freshwater occurs • Persistent low level winds (Somali or Findlater Jet)

  10. SW Monsoon

  11. NE Monsoon

  12. Indian Ocean Circulation • Far more complicated than Atlantic or Pacific • Monsoon winds drive seasonal changes in observed currents in Arabian Sea • Reversing currents include Somali, NEC & NECC • Somali current reaches > 3.5 m/s • Intense open ocean upwelling

  13. The American Monsoon • Occurrence of July Thunderstorms over NW Mexico & Arizona • Driven by monsoon between Pacific Ocean & the American Desert • Huge issue for flash floods

  14. The American Monsoon Monthly precipitation over SW U.S. & Mexico

  15. The American Monsoon July Convective Activity Index

  16. The American Monsoon

  17. The American Monsoon • Occurrence of July Thunderstorms over NW Mexico & Arizona • Driven by monsoon between Pacific Ocean & the American Desert • Huge issue for flash floods

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