[forces of nature] english - espaņol - flash version - main page
[heading] [images]



[ m o n s o o n s   :   s u m m e r   m o n s o o n ]


During the summer monsoon,

  • Heat is reflected off the Tibetan plateau, heating the air above it and causing it to rise. Low-level warm air also flows southward from the Arabian peninsula, the African Sahel desert, Rajasthan, and Pakistan.
  • The westerly jet stream over northern India shifts north of the Himilayas. The westerly jet stream in south India changes direction and becomes an easterly.
  • The Somali jet stream crosses into the Arabian Sea, changing the direction of ocean currents. Colder water welling up from lower ocean layers lowers the temperature.
  • A low-pressure trough where the southern and northern trade winds meet, a border known as the intertropical convergence zone (ITCZ), moves north.
  • Tropical storms, depressions, cyclones, squall lines, and daily cycles become create uncertainties.
  • A low-pressure “monsoon trough” appears parallel to the Himalayan mountains in the south. The trough’s fluctuations influence when monsoon rains fall and stop.

[ format this page for printing ]


[ info ]: introduction - the legend - what's a monsoon? - causes of monsoons - summer monsoon - winter monsoon - references - glossary

[ reality ]: current events - real life stories - interviews

[ interact ]: multimedia - simulations - classroom - activities - quizzes - message board - resources

[ general ]: about - win our award - awards we've won - guestbook - help - contact us - sitemap

[ forces ]: avalanches - droughts - earthquakes - flooding - fog & mist - forest fires - hurricanes - landslides - monsoons - phenomena - severe storms - snowstorms - tornadoes - tsunamis - volcanoes - windstorms - main page