typhoons

• Typhoons

  • are formed over the northwest pacific ocean
• • Tropical Cyclones originate over oceans in tropical areas and coastal regions
• • When typhoons hit mountains and trees it decreases the strength of the typhoon
• • Typhoons are created because there is warm and cold air in the pacific ocean that will create typhoons.
• Wind movement:

  • Determined by low pressure and high pressure
• • Lp and Hp makes the winds move
• • Always blow from the high pressure areas to the low pressure areas
• 1. Continuous Evaporation

  • Heat causes water to evaporate
  • Saturating clouds and making them heavy with moisture to eventually fall back to earth as rain
  • All the heat and air flow towards the eye creating typhoon
• 1. LPA

  • Warm, moist air rises from the ocean surface, creating low pressure area near the ocean surface
• 1. HPA

  • Air from HPA rushes towards LPA
  • This air is initially dryer and cooler but near the ocean surface, the air is heated and carries more water vapor from continuous evaporation.
• 1. Condensation

  • As the warm air rises toward the cooler parts of the upper atmosphere, it cools off and the water vapor and begin to condense to form clouds
• 1. Coriolis Effect

  • In the northern Hemisphere or above the equator the wind rotates counterclockwise around the storm center, and clockwise in the southern hemisphere this is called the “Coriolis effect”
• 1. Convergent Winds

  • The difference between HP and LP air pressure systems creates winds. Accumulation of high-speed winds moving toward a particular area which is called “convergent winds” These create an increase in air pressure.
• Eye

  • A LP air pulls the air inward, creating a spiral that moves around the center, which then becomes the eye of the storm
• eyewall

  • Clouds heavy with rain swirl around the eye, forming the eyewall where winds and rain are at their strongest
  • While air rises towards the eyewall, it converges and sinks into the eye, where it is compressed and heated
• • Communities experience the eyeball twice
• Tropical Depression 61 km/h
• tropical storm 62-117 km/h
• typhoon 118-220 km/h
• super typhoon 220 km/h and above