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7. Air Masses

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Weather and Climate: a Teachers’ Guide

Pathway: Basic weather 

 Weather and Climate – Atmospheric and Oceanic Circulation – Climate ZonesAir Masses

Lesson overviewIn this lesson we investigate
the characteristics of the major air masses which can affect the British Isles
and introduce wind roses to investigate common wind directions and associated
air masses. 

Air masses are large volumes of air that have relatively uniform characteristics and can extend over hundreds of miles.  Classified according to the region in which they formed and the path they take to reach us, air masses strongly influence the weather we experience in the UK.  Air masses that affect the UK are predominantly Polar maritime and Tropical maritime but also Polar continental, Tropical continental and Arctic maritime.  The source regions of air masses are the high pressure regions associated with the Global Atmospheric Circulation. One air mass brings different weather to different parts of the country, for instance warming as they travel southwards, or drying out as they progress over land.  The temperature and humidity characteristics of air masses will change with climate change.

Learning objectives:

  • To be able to describe the five major air masses that affect the UK.

  • To be able to draw and interpret a wind-rose diagram.

  • To be able to describe and explain the weather associated with different air masses and how they affect day-to-day life in the UK.

Key Teaching Resources

Air Masses PowerPoint
Air Masses PowerPoint (easier)
Air Masses Information Sheet
Wind Rose
Air Masses Table
Air Masses Table (easier)

Teacher CPD/ Extended Reading

Air Masses – More for Teachers

Alternative or Extension Resources

Air Masses – a Human Board Game

Air Masses Taboo

Air Masses – identifying case studies on Synoptic charts (advanced)

Weather and Climate: a Teachers’ Guide

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