ozone depletion
Decrease in concentration of ozone (O3) in the stratosphere. See ozone layer.
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Chapter 6 - Biogeography: Climate, Biomes, and Terrestrial Biodiversity
microclimates
Local climatic conditions that differ from the general climate of a region. Various topographic features of the earth's surface such as mountains and cities typically create them.
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mangrove swamps
Swamps found on the coastlines in warm tropical climates. They are dominated by mangrove trees, any of about 55 species of trees and shrubs that can live partly submerged in the salty environment of coastal swamps.
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low
Air mass.
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latitude
Distance from the equator. Compare altitude.
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high
Air mass with a high pressure. Compare low.
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Greenhouse gases
Gases in the earth's lower atmosphere (troposphere) that cause the greenhouse effect. Examples are carbon dioxide, chlorofluorocarbons, ozone, methane, water vapor, and nitrous oxide.
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Greenhouse effect
Natural effect that releases heat in the atmosphere (troposphere) near the earth's surface. Water vapor, carbon dioxide, ozone, and several other gases in the lower atmosphere (troposphere) absorb some of the infrared radiation (heat) radiated by the earth's surface. This causes their molecules to vibrate and transform the absorbed energy into longer-wavelength infrared radiation (heat) in the troposphere.
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grassland
Biome found in regions where moderate annual average precipitation (25-76 centimeters, or 10-30 inches) is enough to support the growth of grass and small plants but not enough to support large stands of trees. Compare desert, forest.
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global warming
Warming of the earth's atmosphere because of increases in the concentrations of one or more greenhouse gases primarily as a result of human activities. See greenhouse effect, greenhouse gases.
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