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Climatic Changes and Global Warming


All scientists agree that if greenhouse gases increase the earth will warm up. Climate is the most important environmental variable of our world. It is for some factors that counteract warming just as some other factors enhance it.
According to a recent report, the climate is getting warmer and the effects of global warming are becoming increasingly noticeable in countries throughout the world.

Climate change due to fossil fuel is one of the biggest problems that we are facing today. Burning fossil fuel, such as oil, coal and gas is the way to produce carbon dioxide and other gases that is one of the causes of global warming.

The World Wild Fund for Nature has released The State Of The Climate Report in 1997. The report is a warning against compelling evidences of a shift in the earth’s weather patterns and changes in climate, It showed a huge array of convincing global data which clearly signal that a change is already under way. Every region and most nations are facing adversity of climate change. The year 1995 was the hottest year in the history and 1997 grips a close second. The temperature of the earth’s surface varies substantially from place to place. However, if averaged globally, the surface temperature differs from year to year by only fractions of a degree.

The world is experiencing the biggest melting since the last Ice Age. Earlier in the 20th century much of Siberia is three to five degrees Celsius warmer than it was. Since 1850 Europe’s alpine glaciers have lost half of their volume. Populations of some penguin in Antarctica have crashed. Krills, a food source for many marine animals have declined, seemingly killed by warmer waters. Many parts of the tropics have become hotter and dryer- especially in the arid regions. Another effect that is already expected to occur is the rise in sea levels, due to melting in the polar ice caps. In 1983, Revelle derived a sea level rise of about 70cm for a global warming of 6°k. Global warming is predicted to cause an increase in global mean sea level by 65 cm by the year 2100 in a report by IPCC in 1990. The primary effect of rising sea level will be cause an increase in coastal flooding, storm surges and wave activities.

Climate change could lead to the extinction of some migratory birds. Global warming has already changed the migration route and place of some migratory birds. In some parts of the world It has caused dramatic impacts of wildlife with rapid depletion of the tiny plankton organisms which forms the food web in the oceans. This is thought to be contributed to a recent severe decline of some sea birds’ population, as the fish on which they depend were suddenly deprived of food.

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Content copyright © 2014 by Farjana Amin. All rights reserved.
This content was written by Farjana Amin. If you wish to use this content in any manner, you need written permission. Contact Farjana Amin for details.

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