The global warming is caused by emissions of over 20 gases into the atmosphere. The major contributors are carbon dioxide (CO2), ozone, methane, nitrous oxide and chlorofluorocarbons (CFCs).
Although these gases are produced by many industrial processes, the major source is the burning of fossil fuels in boilers, furnaces and automobile engines. When released into the air in large quantities, these gases cause the earths atmosphere to warm by trapping the suns heat. Infrared radiation that would normally be reflected back into space hovers in the atmosphere, like thick blanket over the earth. Author Brian Hanwerk of National Geographic News maintains that the arctic is melting fast. Studies are now being done on the Arctic climate. The 300 scientists involved here used climate models and made moderate estimates of future emissions of carbon dioxide.
It is a revelation that the Alaska, western Canada and eastern Russia avcrage temperatures that have already increased considerably. And then in the next hundred years, temperatures will rise to 7 to 13 degrees Fahrenheit. This spells disaster in terms of the health of people and challenge the survival of some cultures .(Warming to Cause Catastrophic Rise in Sea Level?).
Scientists claim that “Sea ice is retreating, glaciers are reducing in size, permafrost is thawing, all [these indicators] provide strong evidence that it has been warming rapidly in the Arctic in recent decades.” This means that climate will be changed globally (Warming to Cause Catastrophic Rise in Sea Level?).
The Term Paper on Global Warming Climate Change
Global Warming - Its Implications on the Human Population Though there is some scepticism that climate change is a result of human actions, it is unlikely to be a natural event. Some dismiss the phenomenon known as "global warming" as a hoax, and claim that yuppies driving SUVs could not possibly change the overall temperature of the earth. In a sense, this misguided notion is true- but climate ...
The solution: Slow climate change. When: as soon as possible.
However, people seem to be oblivious to the problem even if the Arctic is already showing signs for people to be alarmed.(Warming to Cause Catastrophic Rise in Sea Level?).
Similarly, author Stefan Lovgren says that the biggest danger in global warming is caused by sea levels that rise dramatically. The thermal expansion raises oceans to 4 8 inches. However, scientists still feel that Greenlands massive ice sheet is dangerous if it starts melting. Some scientists have even drawn computer models to show how vulnerable coastal cities are to sea rising. It can submerge and completely wipe out entire cities (Warming to Cause Catastrophic Rise in Sea Level?).
It is appalling to know that the current rate of warning is warming at the fastest rate in millions of years.
Meanwhile, a compilation of paleoclimate records from lake sediments gives a view of the Arctics environmental variability over the last 400 years. There were retreats of glaciers and melting of permafrost and the warming of the atmosphere. Indeed the data on the effect of carbon dioxide on the earths atmosphere have several issues that need clarity. Some of Arrhenius calculations were oversimplified. He failed to consider how cloudiness might change if the Earth got a little warmer and more humid. Other experiments such as the effect of water vapor also provided an issue for clarification. It states that water vapor, which is afar more abundant in the air than carbon dioxide, also intercepts infrared radiation. Ina the spectrographs of the time, the bands of the two gases entirely overlapped one another.
It seems that more CO2 could not affect radiation in bands of the spectrum that water vapor, as well as CO2 itself, were already blocking entirely. Thus, studies on the effect of carbon dioxide stagnated for decades. There were scientists who claimed that doubling or halving CO2 would bring s 4 degree Centigrade rise or fall of surface temperature, and thus the carbon dioxide theory of the ice ages is a possible theory. (Hulburt, 1931).
Several explanations about the earth regulating itself of the amount of carbon in the atmosphere and other theories evolved. Yet the theory that atmospheric CO2 variation could change the climate was never altogether forgotten..
The Term Paper on Global Warming Will Lower Sea Levels
Those who are highlighting the danger of global warming would not hesitate to relate it to a high sea level rise simply because according to their premise when there is global warming it affects both the Arctic and Antarctic regions, whereby the melting ice will eventually raise the sea level. The IPCC, the UN branch office that deals with scientific research had predicted a 20 inches sea level ...
