prepare a report on global warming ? plzzz fast
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Another way of describing global warming is, Anthropogenic climate change. This refers to the effects of “greenhouse gases” emitted by human activity. By examining the polar ice cores, scientists became convinced that human activity has increased the proportion of greenhouse gases in the atmosphere, which have increased dramatically since the beginning of the industrial age several hundred years ago.
The Fourth Report of the IPCC, released in 2007, stated that, “multiple lines of evidence confirms that the post-industrial rise in greenhouse gases does not stem from natural mechanisms”. In other words this is causing climate change, and the significant increases in the atmosphere of these greenhouse gases are a result of human activity.
The most notable of the greenhouse gases are carbon dioxide (CO2), methane (CH4) and nitrous oxide (N20). Alarmingly, these gases are at the highest levels for over 650,000 years. In September of 2015, which is normally the lowest CO2 month of the year due due to Northern Hemisphere plant growth, the CO2 level in the earth’s atmosphere passed 404 PPM. The level of 400 PPM was a major climate change benchmark level.
The “Greenhouse Effect” is a climate model that describes the effect of certain gases in the atmosphere on the retention of infrared (heat) energy within the atmosphere. Solar radiation strikes the earth. Some is reflected back as visible light and some is absorbed by the surface of the earth and turns into heat. The Earths surface radiates this heat energy. But, before this energy can escape to outer space, greenhouse gases in the atmosphere absorb some of it, which makes the atmosphere warmer. As the atmosphere gets warmer, it makes the Earth's surface warmer, too. Without the greenhouse gases, the infrared energy would pass through the atmosphere and out into the space.
The greenhouse metaphor comes from a similar phenomena seen in an glass enclosed greenhouse. In this case, light energy passes through the transparent glass an strikes the surface. Some of the light converts to heat. The heat is retained within the structure because it doesn’t pass as readily through the glass as light does, as well as, not being exposed to the atmosphere in general.
The Greenhouse Effect model was a model that scientists used to explain observed affects. Experiments where conducts over decades with the results compared to those expected as part of the model. For example, the infrared absorption and re-emission rates are well know and could be used to predict atmospheric temperature at any given concentration. As the experimental evidence accumulated and the correlation between greenhouse gas level and model predictions continued, it became clear to the vast majority of scientists that Anthropogenic climate change was real.
Hope this may help you
The Fourth Report of the IPCC, released in 2007, stated that, “multiple lines of evidence confirms that the post-industrial rise in greenhouse gases does not stem from natural mechanisms”. In other words this is causing climate change, and the significant increases in the atmosphere of these greenhouse gases are a result of human activity.
The most notable of the greenhouse gases are carbon dioxide (CO2), methane (CH4) and nitrous oxide (N20). Alarmingly, these gases are at the highest levels for over 650,000 years. In September of 2015, which is normally the lowest CO2 month of the year due due to Northern Hemisphere plant growth, the CO2 level in the earth’s atmosphere passed 404 PPM. The level of 400 PPM was a major climate change benchmark level.
The “Greenhouse Effect” is a climate model that describes the effect of certain gases in the atmosphere on the retention of infrared (heat) energy within the atmosphere. Solar radiation strikes the earth. Some is reflected back as visible light and some is absorbed by the surface of the earth and turns into heat. The Earths surface radiates this heat energy. But, before this energy can escape to outer space, greenhouse gases in the atmosphere absorb some of it, which makes the atmosphere warmer. As the atmosphere gets warmer, it makes the Earth's surface warmer, too. Without the greenhouse gases, the infrared energy would pass through the atmosphere and out into the space.
The greenhouse metaphor comes from a similar phenomena seen in an glass enclosed greenhouse. In this case, light energy passes through the transparent glass an strikes the surface. Some of the light converts to heat. The heat is retained within the structure because it doesn’t pass as readily through the glass as light does, as well as, not being exposed to the atmosphere in general.
The Greenhouse Effect model was a model that scientists used to explain observed affects. Experiments where conducts over decades with the results compared to those expected as part of the model. For example, the infrared absorption and re-emission rates are well know and could be used to predict atmospheric temperature at any given concentration. As the experimental evidence accumulated and the correlation between greenhouse gas level and model predictions continued, it became clear to the vast majority of scientists that Anthropogenic climate change was real.
Hope this may help you
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