tropical storms

• VCN

  VULNERABILITY - higher population= higher risk

  CAPACITY TO COPE - better ability to cope = lower threst

  NATURE OF NATURAL HAZARD
• reducing the risk

  monitor

  prepare

  prediction

  prevention
• tropical storms occur between 5 degrees and 30 degrees north and south of the equator (sun rays are strongest)
• tropical storm conditions:

  between 5 and 30 degrees N + S of equator

  sea temp = 27 degrees +

  depth of water = 60-70m
• tropical storms don't occur at equator because coriolis effect isn't strong enough for them to spin
• North America/ Mexico = hurricane
• africa = cyclone
• asia = typhoons
• saffir simpson scale

  74-95mph =1

  96-110mph = 2

  111-129mph = 3

  130 - 156mph =4

  157mph + =5
• stage of a tropical storm

  1. warm air from suns radiation heats oceans
  2. the oceans are heated to 27 degrees
  3. the causes moist air to rise giving low pressure at centre of the storm
  4. air cools as it rises, causing condensation, clouds and rain
  5. some cooled air sinks - forming the EYE
  6. air rushes from higher pressure areas outside of the storm, creating strong winds.
  7. the storm rotates because of coriolis affect
• effects of a tropical storm

  storm surge

  buildings destroyed
• primary effect - the initial impact of a natural event on people or property, caused directly because of it
• secondary effect - the after-effects that occur as indirect impacts of a natural event, sometimes on a larger timescale.
• primary effects of a tropical storm

  buildings + bridges destroyes

  roads, railways, ports damaged

  people killed or injured

  rivers + coastal areas flood
• secondary effects of a tropical storm:

  shortage of clean water + lack of sanitation

  disease

  sewage overflows

  aids and emergency struggle to reach survivors because of blocked roads

  food shortages - crops damged

  homelessness

  business lost
• reducing damage of tropical storms?

  stronger building materials

  storm surge barriers

  build on higher land

  better warning systems

  evacuation sooner
• climate changes effect on tropical storms?

  oceans are warmer

  hurricanes more common

  sea level has risen