Depressions

Cross Section of a Depression | Source

Depressions are low pressure weather systems that produce cloudy and rainy weather conditions.

Depressions develop when warm air (possibly tropical maritime) meets cold air (possibly polar maritime).

The boundary between the different air masses is called a front.

Depressions show up clearly on satellite images as great swirls of cloud.

Depressions bring a sequence of weather changes as they pass over head. Due to the rising of air caused by the movement of the fronts and interaction between the warm and cold air there are lots of clouds and precipitation.

Look at the Cloud Patterns - can see any anticyclones or depressions?

Turn the Clouds layer on in Google Earth (it is best if you are using the latest version of Google Earth) then download and open the GuiWeather Current Tropical Storms layer. Look for the tropical storms and match them to their cloud patterns.

GuiWeather: Current Tropical Storms

Source

Depression Booklet (One needed per student)

Depression Icons (Three students per sheet)

Fold and cut the Depression Booklet sheet to turn it from a sheet of A4 paper into a booklet. Instructions on the necessary folds and cuts can be found here.
Using the summary table in the booklet - decide which icons should be stuck to which page. Stick them to the pages in such a way that you can still see the landscape.
Add the necessary clouds to the images using the Depression Cross Section from the top of this page and your knowledge about the amount and type of rainfall associated with each stage.

geographyalltheway.com - Online Geography Resources | Year 8 Geography