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The hockey stick controversy and the legitimacy of IPCC's about the human impact on climate change - Research Paper Example

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The Hockey Stick Controversy and the Legitimacy of IPCC's Research about the Human Impact on Climate Change 13rd December 2012 The hockey stick controversy is a series of controversial debates that have faced the climate change world…
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Download file to see previous pages The controversy also looks at the question of the sturdiness of the impost offered by the Intergovernmental Panel on Climate Change (IPCC). These arguments have been taken up by the fossil fuel industry and have been funded by lobby groups that attempt to cast doubt on climate science. The controversy became prominent in the 1990s when a group of scientists who used proxy indicators to indicate temperature records in the previous centuries found different reasons that caused global warming and argued them differently (Jolis, 2012). A group of scientists such as Michael E. Mann, Raymond S. Bradley, and Malcolm K. raised some of those controversies by using statistical analysis of an assortment of proxies to come up with the first quantifiable hemispheric-scale reconstruction presenting global configurations of annual surface temperature. The graph shows temperatures that dates back to 1400 whereby they shaded the areas to show emphasis of uncertainties whereby the two standard error limits were larger than in earlier centuries. The above group of scientists published a paper in 1999 that traced back climatic changes for the previous 1000 years using extended graph that showed a descending tendency in proxy temperatures from a medieval warm period trailed by a 20th century escalation and a steep upsurge in measured temperatures since the 1950s. According to United Nations Intergovernmental Panel on Climate Change (IPCC) and Third Assessment Report (TAR), the year 1998, was the warmest year in the northern hemisphere for the last 1000 years. The above organizations used the controversial hockey stick graphs to publicize the featured information. The information became a focus for dispute for the people who were contrasting to the strengthening scientific agreement that late 20th century warmness was unique. Some of the scientists who were opposed to these changes were Willie Soon and Sallie Baliunas. However, scientists later dismissed their publication as deeply flawed (McKitrick, 2010). I also disagree with the legitimacy of the previous research used by the United Nations Intergovernmental Panel on Climate Change (IPCC) since their research shows less dramatic results if techniques that are more reliable had been used to analyze the data. Later researches have shown that an increase in greenhouse gases due to human activity is a prime cause global warming. However, arguments in favor for global warming were already accepted widely as a prime cause for increased temperatures in the world. Conclusions made from other scientists shows that making the world warmer undoubtedly is not determined by reconstructions of temperature aforementioned to direct records. Most error pieces fall inside the stated hockey stick pieces created by Mann and his team of scientists but can be collected to indicate the late temperatures. There are major doubts about the correctness of all previous temperature re-establishments, and these qualms have sometimes to be glossed over by scientists who presented the hockey stick as suggestion for global warming (Regalado, 2005). Michael E. Mann, Raymond S., Bradley, and Malcolm K., have remodeled northern hemisphere temperatures for the previous 2000 years to incorporate a wider set of proxies than what was accessible for the original study and updated measurements from the late years. I the new reconstruction, different methods am used as compared to the previous methods used in the original case. It shows ...Download file to see next pagesRead More
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