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ozone
ozone layer
ozone layer The atmospheric layer at 15–30 km altitude, in which ozone (O
3) is concentrated at 1–10 parts per million. Ozone also occurs in very low concentration at altitudes of 10–15 km and 30–50 km. Generally, atmospheric ozone is produced by the photochemical dissociation of oxygen (O
2), resulting from absorption of ultraviolet solar radiation, to form atoms of oxygen (O). These atoms collide with molecular oxygen (O
2) to form ozone (O
3), which in turn absorbs solar radiation for further dissociation to O and O
2. The ozone layer limits the amount of ultraviolet radiation reaching the ground surface. See also
ATMOSPHERIC STRUCTURE.
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Antarctic Ozone Transport and Depletion in Austral Spring 2002
Magazine article from: Journal of the Atmospheric Sciences; 3/1/2005; ; 700+ words
; ABSTRACT The ozone budget in the Antarctic region during the stratospheric warming in 2002 is studied, using ozone analyses from the Royal Netherlands Meteorological Institute (KNMI) ozone-transport and assimilation model called TM3DAM...
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Ozone concentrations in the central Wasatch Mountains of Utah.(TECHNICAL PAPER)(ozone concentrations )
Magazine article from: Journal of the Air & Waste Management Association; 10/1/2006; ; 700+ words
; ...August SUM60 value (sum of hourly average ozone concentrations [greater than or equal...exceeded in 9 yr between 1978 and 1998. Ozone concentrations in the nearby Central Wasatch...concentrations >100 ppbv suggests that ozone-sensitive species may be injured. Ozone...
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Ozone's impact on public health: contributions from indoor exposures to ozone and products of ozone-initiated chemistry.(Review)
Magazine article from: Environmental Health Perspectives; 10/1/2006; ; 700+ words
; OBJECTIVE: The associations between ozone concentrations measured outdoors and both morbidity and mortality may be partially due to indoor exposures to ozone and ozone-initiated oxidation products. In this article I examine...
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Ozone exposure and population density in Harris County, Texas.
Magazine article from: Journal of the American Statistical Association; 6/1/1997; ; 700+ words
; 1. INTRODUCTION Ambient ozone pollution in urban areas represents one of...problems. While the decreasing stratospheric ozone layer may lead to increased instances of skin cancer, high ambient ozone intensity has been shown to cause damage...
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Ozone May Provide Environmentally Safe Protection for Grains.
News Wire article from: Ascribe Higher Education News Service; 1/30/2003; 700+ words
; ...University researchers have discovered that ozone can eliminate insects in grain storage...international treaty banning the use of ozone-layer harming chemicals currently used...food storage facilities of insects. When ozone is used for killing grain insects, it...
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Ozone: the pollution paradox.
Magazine article from: New York State Conservationist; 6/1/1997; ; 700+ words
; Near the ground, ozone is an air pollutant from man-made emissions...common cousin oxygen (O[sub.2]), ozone (O[sub.3]) is a highly reactive...forms and destroys substances, including ozone. When everything is working properly...
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Ozone Level Fell 5% From 1979 to 1986
Newspaper article from: The Washington Post; 1/1/1988; ; 700+ words
; The ozone content of Earth's atmosphere declined...the first report from an effort to monitor ozone levels worldwide. The decline was as high...poles-where, during a seasonal Antarctic "ozone hole," more than 60 percent of the ozone...
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Ozone Holes Found Causing Radiation Rise ;Southern Hemisphere Affected, Study Says
Newspaper article from: The Washington Post; 7/27/1989; ; 700+ words
; As the ozone hole over Antarctica breaks apart each year...discovered, it spews forth massive jets of ozone-poor air that have caused the largest...the South Pole have caused record lows for ozone concentrations over Australia and New Zealand...
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 "Herald-News (Joliet, IL)")
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OZONE NOT A CHICAGO-ONLY PROBLEM GLOBAL VIEW: LOCAL HEALTH EXPERTS URGE CHANGES IN BEHAVIOR
Newspaper article from: Herald-News (Joliet, IL); 7/1/1998; 700+ words
; ...consider the recent string of consecutive Ozone Action Days declared by the Illinois Environmental...past week. Those warnings of unhealthy ozone levels are actually forecasts based on...on the western frontier that the highest ozone level recorded last week was not over the...
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Ozone Sensitivity of 28 Plant Selections Exposed to Ozone Under Controlled Conditions
Magazine article from: Northeastern Naturalist; 1/1/2008; ; 700+ words
; ...Abstract - Ambient, ground-level ozone is the most important air pollutant affecting vegetation in the US. However, ozone-sensitive bioindicators need to be...for use in field surveys to detect ozone-induced symptoms. To identify such...
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Ozone
Book article from: Pollution A to Z
Ozone Ozone is a gas found in the atmosphere in very trace amounts. Depending on where it is located, ozone can be beneficial ("good ozone") or detrimental ("bad ozone...
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Ozone Layer and Ozone Hole Dynamics
Book article from: World of Earth Science
Ozone layer and ozone hole dynamics In 1985, atmospheric scientists discovered that stratospheric ozone over Antarctica had been reduced to half its natural level. This local loss, termed the Antarctic ozone hole, was traced to destruction of...
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Ozone Hole
Book article from: Mathematics
Ozone Hole The so-called ozone hole sometimes is confused with the problem of global warming. Even...there is a connection between the two environmental issues, because ozone contributes to the greenhouse effect, the ozone hole is a separate...
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Ozone Layer Depletion
Encyclopedia entry from: The Gale Encyclopedia of Science
Ozone Layer Depletion The ozone layer is an atmospheric layer that helps shield the surface of the...of deoxyribonucleic acid, DNA. As the result of pollution, the ozone layer is being depleted. The thinning of the ozone layer, and its...
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ozone layer
Book article from: The Oxford Companion to the Earth
ozone layer Ozone is a blue-green poisonous gas that is composed of three oxygen atoms...altitude with a maximum concentration at around 25km (Fig.1). This ozone layer is believed to be most important to life on Earth because ozone...
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