weather hazards part 1
global atmospheric circulation
winds are large scale movements of air caused by differences in air pressure
air pressure is caused by differences in temperature
winds move from high to low pressure
cool falling air causes high pressure
hot air rising causes low pressure
Tropical storms
form when sea temperatures 27 degrees or higher
warm, moist air rises and condenses
move west because of easterly winds near the equator
rotation of the earth deflects the path of the storm making it spin
energy and winds of the storm increases due to the warm water
happen between 5 ans 30 degrees north and south of equator
most form in the northern hemisphere
climate change may affect
global temperatures rise so does the amount of sea that is 27 degrees or above
longer period where water is warm
higher temperature = stronger storms
effect and responses to tropical storms
primary effects
damage to building and bridges
river and coastal area flooded
people drowned killed or injured
transportation links damaged
electricity cut off
sewage flood
secondary effects
people homeless = ill health, distress, poverty or death
disease spread
no clean water
aid unable to get through because of blocked roads
unemployment
lack of food
immediate responses
evacuation before arrival
rescue people
treat injuries
temporary shelters
temporary supplies of food water electricity
recover dead bodies to prevent spread of disease
aid sent out
disaster response tools set up
long - term responses
repair homes or rehouse people
improve flood defences
improve forecasting techniques
provide residents with aid, grants or subsides
promote economic recovery
improve building regulations