Aim: How do air masses differ?

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Presentation transcript:

Aim: How do air masses differ?

Welcome two air masses that came to visit us from far away places!

How do we define air mass? Air Mass – A large volume/parcel of air that has characteristics based on temperature and moisture (humidity) Source Region – area on earths surface which an air mass originates (forms). - determines the temperature & moisture of the air mass.

How do we determine the characteristics of an air mass? Name Origin (Source Region) where it formed Symbol Temperature or Humidity Characteristic of air mass Continental Over Land c Humidity (moisture) Dry – more dense (heavy) Maritime Over Water m Humidity Moist (Wet) –Less dense Tropical Low Latitudes (Equator) T Temperature Warm – Less Dense Polar High Latitudes (Poles) P Cool – More Dense Arctic Very High Latitudes (Arctic) A Very Cold – Very Dense

How are air masses named? ESRT page 13 Symbol Name of Air Mass Conditions of Air Mass originates (Source Region) cA Continental Arctic Dry and Very Cold Arctic regions (Poles) cP Continental Polar Dry and Cool Central Canada cT Continental Tropical Dry and Warm Mexico or Central Texas mT Maritime Tropical Moist and Warm Gulf of Mexico mP Maritime Polar Moist and Cool North Atlantic Ocean & North Pacific Ocean

4 2 1 3 5 6 7 cA cP mP mP cT mT mT Summary Activity Using the diagram, Identify the name (symbol) of the air mass to its source region. 4 2 1 3 5 6 7 cA mP mP cP cT mT mT

Extra Questions

Summary Activity Using the diagram, Identify the name (symbol) of the air mass to its source region. 4 2 1 3 5 6 7

How do we define air mass? Air Mass – A large volume/parcel of air that has characteristics based on Source Region – area on earths surface which an air mass (forms). - determines the .

How are air masses named? Symbol Name of Air Mass Conditions of Air Mass originates (Source Region) cA Continental Arctic Dry and Very Cold Arctic regions (Poles) cP Continental Polar Dry and Cool Central Canada cT Continental Tropical Dry and Warm Mexico or Central Texas mT Maritime Tropical Moist and Warm Gulf of Mexico mP Maritime Polar Moist and Cool North Atlantic Ocean & North Pacific Ocean