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Global Warming Essay

1807 words - 8 pages

What is Global warming?Global warming refers to an average increase in the Earth's temperature, which causes changes in the climate. Increase in temperature may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. When scientists talk about the issue of climate change, their concern is about global warming caused by human activities.()The current major warming trend began about 18,000 years ago with the end of the last Ice Age. Since then, the oceans have risen hundreds of feet and glaciers have melted. Ice once stood a mile high, as that ice melted, the oceans rose.Sea-level has risen about 130 meters (400 ft) since the peak ...view middle of the document...

Adaptation is essential to cope with unavoidable climate changes, and in this country is essentially a task to be performed by Australians for Australians in each local situation.ClimateAnalysis of future emissions trajectories indicates that, left unchecked, human GHG (Greenhouse gases) emissions will increase severalfold over the 21st century. As a consequence, Australia's annual average temperatures are projected to increase 0.4-2.0°C above 1990 levels by the year 2030, and 1-6°C by 2070. Average precipitation in southwest and southeast Australia is projected to decline further in future decades, while regions such as the northwest may experience increases in precipitation. Meanwhile, Australia's coastlines will experience erosion and inundation from an estimated 8-88 cm increase in global sea level. Such changes in climate will have diverse implications for Australia's environment, economy, and public health.[3]The Government of Australia acknowledges the impacts of changing climatic conditions. The Department of Climate Change has established the Australian Climate Change Science Program. The main focuses of this program are to understand the causes, nature, timing, and consequences of climate change so that the country can make more informed decisions as a whole. The ACCSP will dedicate 14.4 million dollars per year towards climate change research and has already made substantial progress with a recent publication, "Australian Climate Change Research: Perspectives on Successes, Challenges, and Future Directions." ACCSPBush firesFirefighters are concerned about the effects of climate change on the frequency and intensity of bushfires under even a "low global warming" scenario.[4]South Eastern Australia was identified as one of the 3 most fire-prone areas in the world in a 2006 report.[5]The report prepared by CSIRO Marine and Atmospheric Research, Bushfire CRC and Australian Bureau of Meteorology made a key finding that an increase in fire-weather risk is likely at most sites in 2020 and 2050, including the average number of days when the FFDI rating is very high or extreme. It also found that the combined frequencies of days with very high and extreme FFDI ratings are likely to increase 4-25% by 2020 and 15-70% by 2050. It also found that the increase in fire-weather risk is generally largest inland.[6]The 2009 Victorian bushfires occurred after a period of record hot weather. The fires have resulted in the loss of over 210 lives (confirmed as at 22 March 2009)[7], destruction of 1830 homes and over 7,000 people made homeless.[8]Extreme weather eventsGlobally, the World Meteorological Organization has claimed that extreme events are on the rise as a result of anthropogenic perturbation of the climate system, (CSIRO (op cit) World Meteorological Organisation (2003). Press release, Geneva, Switzerland, 2 July.) and climate models indicate the potential for increases in extremes of temperature, precipitation, droughts, storms, and...

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