Suggest why many countries find El Niño weather anomalies very challenging.(10)
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7 Study Figure 7.
(a) Suggest why many countries find El Niño weather anomalies very challenging.(10)
El Nino is referring to the dramatic change that occurs in the walker circulation cell and in other areas but I am going to focus on this specific area, where the usually south-easterly trade winds going from west of South America to Australia and Indonesia across the Pacific Ocean reverse or severely weaken. This occurs usually every 3-7 years and can last between 12-18 months. During an El Nino the warm sea in the western pacific migrate towards the South American coast because they are being dragged across by the winds. This stops the upwelling near South America and means that there are little nutrients in the sea. This lack of…show more content… Overall El Niño is a world wide phenomenon which affects countries in different ways depending on were they are situated and whether they are a LEDC or MEDC.
(b) Explain why the human and economic costs of global hazards have increased rapidly over time.(15)
Both human and economic cost of global hazards are increasing over time due to one reason, this reason is that global hazards are more frequent in the present day. Global hazards can be split into to groups hydrometeological or geophysical. Geophysical events have occurred at constant frequency throughout the ages as they are formed by tectonic or geological processes, which can’t be affected by human factors, an example of this type of event is an Earthquake or volcano. Where as on the other hand hydrometeological hazards are increasing as they are formed by hydrological or atmospheric processes, which are affected by human factors such as global warming, an example of this type of event, is a Flood or hurricane. The economic and human cost of global hazards is vast with trillions of dollars being lost due to hazards every year. Firstly we as humans are increasing population at an alarming rate, which means we are putting great pressure on the land which intern causes us to live in