Suggest why many countries find El Niño weather anomalies very challenging.(10)
(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…
The economic and human cost is also increasing as the places that are more at risk of hazard are poorer, meaning they can not cope with it and very often have no pre warning of the an event occurring. Earthquakes that strike in LEDC’S usually have a much higher death toll then those that occur in MEDC, this is so as they can’t afford to prepare for emergencies, for example Bangladesh relies on foreign aid, and poorer country don’t have very good communication technology and they don’t have earthquake-proof buildings. Also some poorer countries have corrupt governments, meaning they may misuse resources or prevent aid reaching their people; these human factors increase the cost of hazard.
It is increasing also due to deforestation and land degradation. Deforestation to provide farm land and source of energy means that the soil is not held together and will not absorb water. This can lead to soil erosion or in the case of heavy rain fall a mudslide and increase the chance of flooding. Also if trees are chopped down in traditionally dry places that are prone to drought it will cause desertification, which ruins the land for agriculture meaning they are losing a huge