Air Quality, Climate Change, and Their Possible Impacts on the Terrestrial Ecosystems of the North American Great Plains
Abstract
The chemical climate (air quality) of the atmosphere is as important as its physical climate (temperature, precipitation). The two components are fundamentally interrelated. The earth has evolved in an atmosphere of life-supporting chemical constituents and has a certain ability for equilibrium and resilience to absorb changes in this chemical climate (Lovelock 1987). However, problems arise when the system becomes overloaded (such as possible global warming). The concentrations of many atmospheric trace gases, gases that occur in relatively small concentrations but are very important, positively or negatively, to life on earth, have been increasing since the onset of the Industrial Revolution. For example, ambient concentrations of carbon dioxide have increased from roughly 280 parts per million at the turn of the century to the present concentrations of about 350 to 360 parts per million (EarthQuest 1990). Many trace gases, when present in high enough concentrations over sufficient duration, can adversely affect ecosystems.
Keywords
Sulfur Dioxide Great Plain Nitrogen Oxide Tropospheric Ozone National Atmospheric Deposition ProgramPreview
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