GLOBAL WARMING - OZONE LAYER DON'T FORGET TO ADD A COMMENT AT THE END OR GO THE BOTTOM OF THE SCREEN TO SEE WHAT OTHERS HAVE WRITTEN |
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ESRL- EARTH SYSTEM RESEARCH LABORATORY - (NOAA) - The NOAA Ozone Depleting Gas Index (CONFIRMED WITH DATA)
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In order to provide the information necessary to satisfy this congressional mandate, both NASA and NOAA have instituted global monitoring programs to keep track of ozone-depleting gases as well as ozone itself. While the information that has been collected for the past 25 years has been used extensively in international assessments of the science of ozone layer depletion, the language of scientists often eludes the average citizen who has a considerable interest in the health of the Earth’s protective ultraviolet radiation shield. |
The greenhouse effect issue concerns the warming of the lower part of the atmosphere, the troposphere (the layer in which temperature drops with height; it is about 10-15 kilometers thick, varying with latitude and season), by increasing concentrations of the so-called greenhouse gases (carbon dioxide, methane, nitrous oxide, ozone, and others) in the troposphere. This warming occurs because the greenhouse gases, while they are transparent to incoming solar radiation, absorb infrared (heat) radiation from the Earth that would otherwise escape from the atmosphere into space; the greenhouse gases then re-radiate some of this heat back towards the surface of the Earth. The ozone hole issue concerns the loss of ozone in the upper part of the atmosphere, the stratosphere, resulting from increasing concentrations of certain halogenated hydrocarbons (such as chlorinated fluorocarbons, known as CFCs). Through a series of chemical reactions in the stratosphere, the halogenated hydrocarbons destroy ozone in the stratosphere. This is of concern because the ozone blocks incoming ultraviolet radiation from the Sun, and portions of the ultraviolet radiation spectrum have been found to have adverse biological effects. The greenhouse effect and ozone hole issues are, however, related. For example, CFCs are involved in both issues: CFCs, in addition to destroying stratosphere ozone, are also greenhouse gases. It has traditionally been thought there is not much mixing of the troposphere and stratosphere. But there is recent evidence of transport of stratospheric ozone into the troposphere (see "Ozone-rich transients in the upper equatorial Atlantic troposphere," by Suhre et al., Nature , Vol. 388, 14 August 1997, pages 661-663, and the related discussion paper, "Ozone clouds over the Atlantic," by Crutzen and Lawrence, on pages 625-626 in the same issue of Nature ). So ozone depletion in the stratosphere could result in reduced concentrations of this greenhouse gas in the troposphere. Conversely, global climate change could also affect ozone depletion through changes in stratospheric temperature and water vapor. |
Carbon Dioxide Information Analysis Center - Though Greenhouse gases include CFC's which is the chemical that destroys the ozone layer. Otherwise Global Warming has nothing to do with the Ozone Layer depletion. (CONFIRMED WITH DATA) |
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ADRIAN COLLEGE CHEMISTRY DEPARTMENT - The Ozone Layer: An Introduction (CONFIRMED WITH DATA) |
The ozone layer is a layer of gas, which is made up of three oxygen atoms.It is created when oxygen gas is broken down by sunlight.The oxygen molecules that are apart bond to other molecules and form ozone.The Ozone is broken down as well to form oxygen gas.This cycle is how ozone maintains the same amount.Ozone is extremely poisonous, however, even when breathing a very small amount of the gas.Ozone gas does help in the prevention of Ultraviolet sunrays getting through the atmosphere, which are harmful to humans. | ||||
Since major volcanic eruptions temporarily thin the ozone layer in the stratosphere, Tilmes and her colleagues looked into the potential impact of geoengineering plans on ozone over the poles. Sulfates from volcanoes provide a surface on which chlorine gases in the cold polar lower stratosphere can become activated and cause chemical reactions that intensify the destruction of ozone molecules, although the sulfates themselves do not directly destroy ozone. The new study concluded that, over the next few decades, hypothetical artificial injections of sulfates likely would destroy between about one-fourth to three-fourths of the ozone layer above the Arctic. This would affect a large part of the Northern Hemisphere because of atmospheric circulation patterns. The impacts would likely be somewhat less during the second half of this century because of international agreements that have essentially banned the production of ozone-depleting chemicals. The sulfates would also delay the expected recovery of the ozone hole over the Antarctic by about 30 to 70 years, or until at least the last decade of this century, the authors conclude. |
UCAR (UNIVERSITY CORPORATION FOR ATMOSPHERIC RESEARCH) - NCAR (NATIONAL CENTER FOR ATMOSPHERIC RESEARCH) - Stratospheric Injections to Counter Global Warming Could Damage Ozone Layer (MUST CONFIRM WITH DATA) |
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Volcanic eruptions destroy ozone and create 'mini-ozone holes', according to two new studies by researchers at the Universities of Cambridge and Oxford. The new research, spearheaded by Dr Genevieve Millard at the Department of Earth Sciences, University of Cambridge, discovered that volcanic gases released during eruptions accelerate reactions that lead to ozone destruction. The researchers found that even relatively small volcanic eruptions can destroy ozone and create localised 'holes' in the stratosphere. |
SCIENCE DAILY - Volcanic Aerosol Clouds And Gases Lead To Ozone Destruction (MUST CONFIRM WITH DATA) |
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