• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The causes and effects of El Nino.

Extracts from this document...

Introduction

The causes and effects of El Nino El Nino is a global phenomenon and was first noticed on the 1500s when Peruvian fishermen noticed changes in the abundance of fish and species. Many of the sea birds, which fed on the local anchovies suddenly disappeared. Therefore the name El Nino, meaning Christ's child, originated because these winds and general changes occurred. In this essay, I will therefore assess the causes and consequences of such an issue. In normal conditions, heat from the sun warms the equator more than it does at the Poles and at the same time, the winds or jet streams move the heat towards the cooler poles. ...read more.

Middle

The diagram below shows the change from Walker Cell to the Southern Oscillation. The convection heating occurs all the time however, El Nino is separated by the change in location of the pool of hot water and convection cell that it causes. El Nino does have an opposite, La Nina, which is where the waters are very cool. Thus the normal winds are in the change between the two. As can be seen from the diagram the effect of El Nino starts from the weak return as the Western winds weaken and the Peruvian coast does not receive its cold currents back. This occurs as air rises (pressure falling) ...read more.

Conclusion

This leads to dead material and plants struggling to survive. The eastern Pacific is more affected because when there is air movement, the air rising over S. America instead of descending. This leads to large storms as well as flooding due to the sea level change. The El Nino of 1997/8 is one of the worst ever seen with its effects seen across the world. Within the Sechura Desert for example, a place that has some of the lowest rainfalls in the world the rainfall from the storms formed a temporary lake which lasted six months. More seriously, the storms caused mudslides within Peru and motorways were ripped up. In conclusion, there are many problems that causes El Nino and is a natural phenomenon that cant be stopped. Although human create it, it has been heightened due to the other factors mentioned. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. Tundra vs. Desert - Opposite worlds or Sister lands.

    Polar bears also have fat to provide warmth, however their body is exceptionally designed in giving it further protection. The arctic bears not only have black skin to absorb extra heat from the sun's rays but they also have white fur which reflects the heat back onto the skin acting as a greenhouse affect.

  2. The Aral Sea Disaster

    Well surely there is some where else they can get water from to fill the Aral sea and then the water used for the cotton can keep being used and the water that does get to the Aral to have some thing that take out the fertilizers and pesticides so

  1. Explain El Nino and the La Nina weather phenomenon.

    They generally occur every four years, but their intensity cannot be predicted. The warm water in the Western Pacific slides back eastwards across the Ocean. As the warm water arrives at the coast of Peru convectional rainfall occurs. The low pressure resulting from the arrival of warm waters causes the

  2. Effect of coppicing on Abundance of Violets.

    I can see this in my preliminary study (pg ) where the total of violets found in the 10 quadrats of the 93 plot was 100 but the total violets found in the 97 plot was 149. This was significantly more in the 97 plot than in the 93 plot.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work