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Why is there wide spread debate as to whether or not El Nino events and global warming might be linked.

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Introduction

Why is there wide spread debate as to whether or not El Nino events and global warming might be linked. El Nino has been known to wreak havoc al around the world, from Australia to Africa to the United States of America, and despite its approximate regularity, it is still not possible to predict exactly when it will appear or how much damage will be caused. Meteorologists discovered in the late 19th century that El Nino weather events appeared to be occurring approximately every ten to fifteen years but in the late 19th century this gradually changed to a strong pulse of about three years by the early 20th century, at the same time it had been noted that the temperature was rising above the average. This was a gradual change until 1976 where changes were occurring, the El Nino events increased in time to once every four years and the temperature was still increasing. El Nino is when a reversal in the wind occurs so it starts from west and then goes east, this causes the sea to warm up and rise increasing the risk of both drought and flooding depending on a person's global location. ...read more.

Middle

The campaign was created to help get worldwide negotiations on how to reduce greenhouse gas emissions, Gore believed this campaign would be a step towards awareness of people using greenhouse gases such as car and factory fumes being the main ones down to throwing away reusable 'rubbish' that cost more to make. The World Meteorological Organisation (WMO), a United Nations agency, said that 1998 remained the hottest year on record, with 2002 surpassing last year as the next warmest. The nine warmest years had all occurred since 1990 so the air was rising higher and with the increase in greenhouse emissions the seas became higher, warmer and a pressure that once again was becoming greater means that the El Nino events are more likely to occur. The director of the world meteorological organisation, Kenneth Davidson said, "Clearly for the past 25 or 26 years, the warming is accelerating...The rate of increase is unprecedented in the last 1,000 years," The world meteorological organisation's scientists went on to try to find a reason for this and how to prevent any damage which on average calculated to $34 billion from the climate changes and that chain effect. Their observations were conducted from land weather stations, ships and buoys, they noted that the global surface temperature has risen by six-tenths of a degree Celsius since 1900, this is caused by the increase in emissions of carbon dioxide (CO2) ...read more.

Conclusion

Earth's climate is dynamic and ever changing. Atmospheric climate controls and non-atmospheric climate controls are independent and also dependant on one another. The individual factors within non-atmospheric climate control work in the same manner; for example, if winds over the Pacific Ocean falter (as in an El Nino event), ocean water temperatures will change, which will affect the precipitation levels. Catastrophic events can also affect the climate on a large-scale basis. A volcanic eruption, for example, can send volcanic ash into the atmosphere around the world, blocking the sun and thereby changing earth's temperatures and weather patterns. One team of scientists also suggest that the phase of the Moon accounts for a global temperature change of about 0.02 to 0.03 degrees Celsius. Experts are always likely to have conflicting theories about whether or not El Nino and Global Warming are linked due to trapped warm air causing the pressure to change the wind direction. Whatever the 'correct' answer is may never be found but some ideas such as using environmentally friendly fuels (hydro electric power (HEP) and solar power for example) would be sensible to put into action because even if they don't help reduce the amount of El Nino weather events that occur then hopefully it will help reduce the risk from other problems such as running out of power and reducing the amount of pollution. ...read more.

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