Global Hazard Trends 🌍 Flashcards
What are 3 reasons that flooding has become a hazard?
- Global warming increases evaporation and speeds up the atmosphere’s circulation
- Pop. growth leading to developments on flood plains
- Deforestation has increased surface run-off
What was an extreme cyclone and when?
Hurricane Katrina in 2005
How many people died as a result of HK?
1100
How many hurricanes occurred in 2005?
15
Why was there an increase in hurricanes in 2005?
La Niña
What is El Niño?
Weakening trade winds leading to warm water in W. Pacific that spreads eastwards.
What is La Niña?
The reverse of El Niño.
Trade winds strengthen and a cool area of water develops in the equatorial Pacific.
What does Teleconnection mean?
Relationship between surface ocean temp.s and weather patterns.
How does pop. growth lead to more natural disasters?
More people are exposed to hazards.
Why does poverty increase the amount of nat. dis.?
Live in areas of high risk so they have access to farmland and water.
How many people in the world are still in poverty?
1.3 billion
What is an example of an area in poverty?
India - 1/3 earn less than $1/day.
How does deforestation lead to a flooding disaster?
It leads to debris flows and flash floods.
Where was a major river flood and when?
Thailand in 2011
How many deaths were caused by ND between 1970 and 2010?
3.3 million
