| BACKGROUND RESEARCH |
What is Global Warming?
GLOBAL WARMING is the increase in the average measured temperature of the Earth's near- surface air and oceans since the mid-twentieth century, and its projected continuation.
source : en.wikipedia.org
The causes of global warming are?
- The Earth's climate changes in response to external forcing, including variations in its orbit around the sun.
- changes in solar luminosity, volcanic eruptions and atmospheric greenhouse gas concentrations.
- The effects of forcing agents on the climate are complicated by various feedback processes. One of the most pronounced feedback effects relates to the evaporation of water. Warming by the addition of long-lived greenhouse gases such as CO2 will cause more water to evaporate into the atmosphere.
source : en.wikipedia.org
How serious will global warming be?
There is much debate in the climate research community over this very question. The consensus of opinion is that a warming of about 0.2 degrees Celsius (about 0.4 deg. F) every 10 years is expected for the next 100 years or so. The reason why there is so much uncertainty, though, is because weather acts to rid the surface of the earth of excess heat. The processes by which this happens are very complex, and usually involve water. For instance, clouds (on a whole) act to cool the Earth. How clouds will change with global warming will be critical, as they could either amplify the warming, or reduce it. The evaporation of water removes a huge amount of heat from the Earth’s surface, and this heat is deposited high in the atmosphere when rain clouds form. It is expected that “global warming” will be accompanied by small changes in rain systems. If those rain systems become more efficient at converting water vapor into precipitation, this would act to offset global warming. This is just one of the uncertainties in predicting how much global warming there will be. There are other uncertainties relating to possible changes in sea ice, snow cover, vegetation amount and type, and how much of the extra carbon dioxide will be absorbed by vegetation or by the ocean.
source : wheatherquestion.com
Opinios about the Global Warming :
There are diverse opinions about the issue of Global Warming, here are some of them: - Global Warming is the result of not paying attention to the signs. every day we are surrounded by the "Inconvenient Truth" of global warming. Ice plates shatter, temperatures rise, hurricanes are developing in different places. We might not face the side affects and neither will our children but our grand children and great grand children might. We cannot blame George W. Bush, we cannot blame countries, we only have ourselves to blame.
- Global warming is the gradual increase in global temperatures caused by the emission of gases that trap the sun's heat in the Earth's atmosphere. Gases that contribute to global warming include carbon dioxide, methane, nitrous oxides, chlorofluorocarbons (CFCs), and halocarbons (the replacements for CFCs). The carbon dioxide emissions are primarily caused by the use of fossil fuels for energy.
Global warming is an observed increase in the average temperature of the Earth's atmosphere and oceans. Part of this increase may be due to natural processes, and would have occurred.
source : wiki.answers.com
Labels: Global Warming |
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Name: PUTERI BALQIS
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