Global warming is the term used to describe a gradual increase in the average temperature of the Earthâ€™s atmosphere and its oceans, resulting in a permanent change in the Earthâ€™s climate.
The Earth has been experiencing a continued increase in its mean atmospheric temperature by about 1.4 degrees F and about two thirds of it occurring since 1980.Â
Scientific evidence indicates that since 1950, the worldâ€™s climate has been warming, primarily as a result of emissions from non -stop burning of fossil fuels and the razing of tropical forests. Carbon dioxide is the primary greenhouse gas emitted through human activities. Human activities are altering the carbon cycleâ€”both by adding ...view middle of the document...
Scientists have found that the number and severity of extreme weather events â€“ record breaking high or low temperatures, high rainfall events or intense storms â€“ are and effective measure of climate change and global warming. Some regions may be wet with rain and some areas will suffer drought due to global warming. Scientists project that extreme weather events, such as heat waves, droughts, blizzards and rainstorms will continue to occur more often and with greater intensity due to global warming.
Another effect of global warming as forecasted by scientists is the shift in climate patterns. These changes will likely include major shifts in wind patterns, annual precipitation and seasonal temperature variations. One of the most drastic effect of global warming is the reduction in Arctic sea ice. In recent years, the Arctic sea ice has reduced to considerable levels and experts project that in coming years the Arctic sea would be completely ice free during summer months. This melting of ice in the Arctic and Antarctic region, coupled with melting ice sheets and glaciers across Greenland, North and South America, Europe and Asia, has lead to significant increase in sea levels, and is expected to rise by 3 feet by 2011 as per a report by IPCC. This will result in flooding and displacement of human population worldwide.
As the level of carbon dioxide in atmosphere increases, the oceans absorb more of that carbon dioxide resulting in the acidification of the oceans. Because acids dissolve calcium carbonate, seawater that's more acidic has a deleterious effect on organisms with shells made of calcium carbonate, such as corals, mollusks, shellfish and plankton. The report of WWF on coral reefs says that coral populations will collapse by 2100 due to increased temperatures and ocean acidification.
Scientists are struggling to predict how the heat building in the seas and atmosphere will affect the strength, intensity and occurrence of the cyclones, typhoons and storms. The increase in sea level due to the ice cap melt has caused the receding of the shorelines, which have been recorded by the researchers. According to the researchers the maximum wind speeds of the strongest tropical cyclones have increased significantly since 1981.
Global warming might cause increased incidence of Lyme disease, dengue fever and malaria because the mosquitoes that are the transmitting agents for these diseases requires winter temperatures of about 18 degrees Celsius for their survival.
The global warming will delay the ozone recovery at Arctic regions making these people to be exposed to a ultra-violet dose, which is relatively higher. The penetration of the more ultra-violet radiations from the sun to the earth poses threats...