Chapter 23 Weather and Climate: Notes

Chapter 23 Weather and Climate: Notes - Chapter 23 Weather...

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Chapter 23 Weather and Climate: Notes 1. air mass – a large horizontally uniform body of air with nearly the same temperature and moisture conditions. Forms when a large body of air, perhaps covering millions of square kilometers, remains over a large area of land or water for an extended period of time. Stationary. But acquires the temperature and moisture characteristics of the land or water through the heat transfer process of conduction, convection, and radiation through moisture transfer process of evaporation and condensation. Tend to retain the acquired temperature and moisture characteristics when they finally break away. Classified according to temperature and moisture conditions where they originate. Two extremes: polar air mass and tropical air mass. Four types of air masses that can influence the weather where you live (1) continental polar, (2) maritime polar, (Moisture Possibilities):(3) continental tropical, and (4) maritime tropical. 2. Anticyclone – High pressure center. Air in high-pressure zones sink, it is then warmed, and the relative humidity is lowered. Thus, clear, fair weather is usually associated with a high. Observing the barometric pressure you can watch for decreasing pressure which can mean the coming of a cyclone and its associated storm weather. Or you can observe for increasing pressure which means a high and its associated with fair weather. 3. Arid – Dry. An area that recieves less than 10in of preceipitation per year. 4. climate – Changes in the atmospheric condition over a brief period of time. Weather follows a yearly pattern of seasons. All of these changes are part of the climate. This is the general pattern of weather that occurs for a region over a number of years. Climate determines what types of vegetation grow in a particular regions, resulting in characteristic groups of plants associated with the region. Also influences the processes that shape the landscape, the type of soils that form, and suitability of the region for different types of agriculture, and how productive the agriculture will be in a region. Three principle climate zones: (1) tropical climate zone, (2) polar climate zone, (3) temperate climate zone. Climate in these zones is determined by (1) altitude, (2) mountains, (3) large bodies of water, and (4)
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This note was uploaded on 02/09/2011 for the course PSC 1121 taught by Professor Tulsian during the Spring '11 term at Daytona State College.

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Chapter 23 Weather and Climate: Notes - Chapter 23 Weather...

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