Oxidant Air Pollution in Remote Forest Areas of Southwestern Virginia PDF Download

Author: John M. Skelly
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 100

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Author: John M. Skelly
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 40

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Author: Paul R. Miller
Publisher: Springer
ISBN:
Category : Nature
Languages : en
Pages : 466

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Since the 1950s, the pines native to the San Bernardino Mountains in Southern California have shown symptoms of decline that have proven to result from exposure to ozone, a major plant-damaging gas in photochemical oxidant air pollution. Because of their proximity to major urban areas, the San Bernardino Mountains have served as a natural laboratory for studying effects of oxidant and acidic air pollution on a mixed-conifer forest. This volume presents a body of research conducted over more than thirty years, including an intensive interdisciplinary five-year study begun in 1991. Chapters include studies of the relationships of biogeography and climate to the region's air pollution, the chemical and physiological mechanisms of ozone injury, as well as the impacts of nitrogen-containing pollutants and natural stresses on polluted forests. The synthesis of such long-term studies provides insights into the combined influences of pollutants on ecosystem function in forested regions with Mediterranean-type climates.

Author: Robert Guderian
Publisher: Springer Science & Business Media
ISBN: 3642701183
Category : Science
Languages : en
Pages : 355

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Photochemical oxidants are secondary air pollutants formed under the influence of sunlight by complex photochemical reactions in air which contains nitrogen oxides and reactive hydrocarbons as precursors. The most adverse components formed by photochemical reactions in polluted air are ozone (0 ) 3 and peroxyacetyl nitrate (PAN), among many other products such as aldehydes, ketones, organic and inorganic acids, nitrates, sulfates etc. An analysis and evaluation of the available knowledge has been used to characterize the relationships among emissions, ambient air concentrations, and effects, and to identify the important controlling influences on the formation and effects of photochemical oxidants. The biological activity of photochemical oxidants was first clearly manifested during the early 1940's, when vegetation injury was observed in the Los Angeles Basin in the United States. Since that time, as a consequence of the increasing emissions of photochemical oxidant precursors, the photochemical oxidants have become the most important air pollutants in North America. In other parts of the world, for example South and Central America, Asia, and Australia, photo chemical oxidants threaten vegetation, particularly the economic and ecological performance of plant life. According to my knowledge, the first observations of ozone and PAN injury to vegetation in Europe were made by Dr. Ellis F. Darley (Statewide Air Pollution Research Center, University of California, Riverside, California) during a study visit (1963/64) to the Federal Republic of Germany.

Author: United States. Environmental Protection Agency. Office of Research and Development
Publisher:
ISBN:
Category : Ozone
Languages : en
Pages : 380

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Author: Oliver Clifton Taylor
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 328

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Author: Oliver Clifton Taylor
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 224

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Author: Oliver Clifton Taylor
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 40

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Author:
Publisher:
ISBN:
Category : Environmental protection
Languages : en
Pages : 106

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Author: Donald D. Davis
Publisher:
ISBN:
Category : Acid precipitation (Meteorology)
Languages : en
Pages : 358

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