Transcription of Chapter 9 : Air Mass - University of California, Irvine
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Chapter 9 : Air Mass - University of California, Irvine
Chapter 9 : Air MassChapter 9 : Air Mass Air Masses FrontsESS124 ESS124 Prof. JinProf. Jin--Yi YuYi YuFronts Fronts on Weather Maps Air massesContain uniform temperature andContain uniform temperature and humidity characteristics. FrontsBoundaries between unlike airBoundaries between unlike air JinProf. Jin--Yi YuYi YuAir MassesAir Masses Air masses have fairly uniform temperature and moisture content in horizontal direction (but not uniform in vertical). Air masses are characterized by their temperature and humidity properties. The properties of air masses are determined by the underlying surface properties where they originate. Once formed, air masses migrate within the general circulation. Upon movement, air masses displace residual air over locations hhidhidihiithus changing temperature and humidity characteristics. Further, the air masses themselves moderate from surface influencesESS124 ESS124 Prof.
Continental Arctic (Continental Arctic (cAcA) Air Masses) Air Masses • Continental Arctic (cA) air represents extremely cold and dry conditions as, due to its temperature, it contains very little water vapor. • The boundary between cA and cP air is the shallow (~1-2 km) arctic front. ESS124 Prof. JinProf. Jin--Yi YuYi Yu
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