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Cards In This Set
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Eruption of Mount Pinatubo
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1991, 15-20 million tons of ash,dust, and sulfur dioxide, atmospheric albedo increased by 1.5%, 60 days after eruption 42% of erupted material spanned the globe from 20 degrees S to 30 degrees N.
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Primary Level of Atmospheric Circulation
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General worldwide circulation of wind
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Secondary Level of Atmospheric Circulation
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Migratory high-pressure and low-pressure systems
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Tertiary Level of Atmospheric Circulation
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Local winds and temporal weather patterns
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Wair pressure is a product of what?
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Temperature and density of a mass of air
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What is the normal sea-level air pressure?
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1013.2 mb
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What is wind produced by?
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Differences in air pressure from one location to another
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As altitude increases, gravity...
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Decreases
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Pressure Gradient Force (PGF)
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Drives high pressure (more dense) to areas of lower (less dense) pressure. (Without this wind would not exist)
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Why do high and low pressure areas exist?
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Because the Earth is unequally heated
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Air ______ in high pressure systems
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Descends
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Air ______ in low pressure systems
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Rises
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Coriolis Force
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Winds don't move in straight lines, the coriolis force deflects anything that flows across Earth's surface, rotation of the Earth causes deflection of surface winds to the RIGHT in the NORTHERN hemisphere and to the LEFT in the SOUTHERN hemisphere.
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Earth's rotational speed at the equator=
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1041 mph
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Geostrophic winds
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Winds between higher-pressure and lower-pressure areas in the upper troposphere flow parallel to the isobars
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