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Chapter 20: Air Masses Section 20.1 - Agenda •Origins of an Air Mass •Types of Air Masses -Continental Artic -Continental Polar -Maritime Polar -Continental Tropical -Maritime Tropical Meteorology - This is the study of processes that govern Earth’s atmosphere helps make weather predictions possible. - Meteorologists are the scientists who specialize in this study - Meteorologists include 1. make weather predictions (forecast) 2.study how tornadoes develop 3. study how hurricanes develop 4. storm chasers Where do Air Masses Come From? An Air Mass is a large body of air in the lower troposphere that has similar characteristics throughout. •When an air mass travels from one place to another, it takes with it the temperature and humidity of its place of origin. Cold air mass from Canada will make Chicago Cold and dry. -Warm and humid air mass from the Gulf of Mexico will make Chicago hot and humid. How do we classify an Air Mass? Scientists classify an air mass based on whether it originates in an arctic, in a polar, or in a tropical region and whether it forms over land (continental) or sea Continental Continental •cA – (Continental Arctic) very cold & dry. •cP – (Continental Polar) cold & dry. •cT – (Continental Tropical) hot & dry. cA Continental Arctic very cold, dry cP Continental Polar cold, dry cT Continental Tropical hot, dry Continental Arctic – Northern Canada Continental Polar – Southern Canada Continental Tropic - Arizona Maritime Maritime •mP – (Maritime Polar) cool & moist. mP Maritime Polar cool, moist mP Maritime Polar cool, moist •mT – (Maritime Tropical) means warm &moist. Vis 2001 mT Maritime Tropical warm, moist mT Maritime Tropical warm, moist Maritime Polar - Vancouver Canada – Lower Western Maritime Tropical - Florida REVIEW… Lets Practice – Find the Origin What is the Origin of air masses: 1.Dry and Cold 2.Moist and Warm 3.Dry and Hot 4.Dry and Very Cold 5.Moist and Cool mP Maritime Polar cool, moist cA Continental Arctic very cold, dry mP Maritime Polar cool, moist cP Continental Polar cold, dry mT Maritime Tropical warm, moist cT Continental Tropical hot, dry mT Maritime Tropical warm, moist
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