Chapter 9 Notes

Chapter 9 Notes - Chapter 9 Notes Air Mass- extremely large...

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Chapter 9 Notes Air Mass- extremely large body of air whose properties of temperature and moisture content are similar to any horizontal direction. Formed when air stagnates for long periods over a uniform surface, thus their characteristics are determined by surface over which they are formed. Air Mass Types: o Cold- originate in Polar regions o Warm- originate in tropical or subtropical regions o Moist- form over oceans or maritime areas o Dry- form over land surfaces or continental surfaces 5 Primary Air Mass Regions: 1) Polar (P)-cold or cool 2) Tropical (T)-hot or warm 3) Arctic (A)-very cold 4) Continental (c)-formed over large land masses, dry 5) Maritime (m)-formed over oceans, moist Four main air mass types: o Continental Polar (cP)- form over interior high latitude regions, such as Canada o Continental Tropical (cT)- form over tropical and subtropical deserts and plateaus, Ex: SW USA o Maritime Polar (mP)- form over oceans at high latitudes, ex: North Pacific, Northeaster (Atlantic) o Maritime Tropical (mT)- form over warm oceans such as Gulf of Mexico Arctic air masses are much colder than polar air masses and form in winter over snow-covered surfaces in Siberia, the Arctic Basin, North America,
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Chapter 9 Notes - Chapter 9 Notes Air Mass- extremely large...

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