49-ME4211 - in the atmosphere are transparent to...

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2. Criteria on the Global Warming The earth's atmosphere absorbs part of the energy emitted as infrared radiation from earth towards space , and is thereby heated. This natural greenhouse effect leading to a warming of the atmosphere has with certainly been increased over the past few centuries by human activities leading to accumulation of such compounds as CO2, N2O, CH4 and halocarbons in the 1 Scenario
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The consequences of the man-made global warming may include increased global average temperatures and sudden regional climatic changes . The worldwide network of climate researchers and atmospheric chemists, the Intergovernmental Panel on Climate Change, (IPCC) is following the latest development in our knowledge of global warming and issuing regular status reports. These status reports comprise the basis of the EDIP method's assessment tool for global warming. 2
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Global warming is an impact affecting the environment on a global scale. What actually causes global warming? Several gases
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Unformatted text preview: in the atmosphere are transparent to ultraviolet and visible light but absorb infrared radiation . These gases allow sunlight to penetrate the atmosphere and be absorbed by the Earth's surface . This sunlight energy is reradiated as infrared radiation (heat), which is absorbed by the greenhouse gases in the atmosphere . 3 Table 4.1 lists the relative contribution of each of these gases to the potential for global warming. 4 Figure 2.1 Greenhouse effect: The greenhouse effect naturally warms the Earth's surface. Without it, Earth would be 33C cooler than it is today-uninhabitable for life as we know it [Enger and Smith, 2004]. 5 In addition to changes in weather , there are many other potential consequences of warmer temperatures and changes in climate- these include rising sea levels, disruption of the water cycle, potential health concerns, changing forests and natural areas, and challenges to agriculture and the food supply. 6 Potential consequences...
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This note was uploaded on 12/07/2011 for the course ME ME4211 taught by Professor Dr.a.vyas during the Winter '11 term at NYU Poly.

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49-ME4211 - in the atmosphere are transparent to...

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