Global Winds Diagram Procedures: 1. Pick TWO colored pencils, one for Calm Regions and one for Wind Belts. Mark the key with the selected colors. 2. Highlight 60oN, 30oN, 0o, 30oS and 60oS with the color selected for the Calm Regions. 3. Label 30oN and 30oS as Horse Latitudes with the selected color for the Calm Regions. The Horse Latitudes are said to be named as such because when sailing ships loaded with horses, sailors would generally get stuck in these calm areas with no wind. They could not keep feeding their horses, so they had to send them overboard! 4. Label 0o as the Doldrums with the selected color for the Calm Regions. The Doldrums are another calm region. These calm regions happen where wind belts meet and run parallel to each other. If you are feeling down in the dumps, moping around and not doing a whole lot, you are said to be “stuck in the doldrums.” 5. Rotate your paper 90o counterclockwise (left). 6. Using the Convection Currents on the right side (now the top) of the diagram, label the following lines of latitude (90oN, 60oN, 30oN, 0o, 30oS, 60oS and 90oS) as HIGH (H) or LOW (L) air pressure systems. **Label them in the space provided on the paper. REMEMBER: Air sinks at high pressure systems and air rises at low pressure systems. 7. Rotate your paper back to normal. Label the following areas with the color selected for the wind belts: a. Between 90oN - 60oN and 60oS - 90oS as the Easterlies. b. Between 60oN - 30oN and 30oS - 60oS as the Westerlies. c. Between 30oN - 0o and 0o - 30oS as the Trade Winds. 8. Below the Key to the diagram, add the type of circular movement created in the northern and southern hemisphere due to the Coriolis Effect. North = clockwise; South = counterclockwise 9. Using the surface wind direction shown by the convection currents on the diagram and the influence of the Coriolis Effect in the northern and southern hemisphere, draw a curved arrow to represent the movement of air for each of the six wind belts. Use the color selected for wind belts to draw the arrows. Draw these arrows between the lines of latitude. **REMEMBER! Air always moves from high pressure to low pressure. So start drawing your arrow and then curve it in the correct direction according to the Coriolis Effect. ____ Global Wind Belts ____ 90°N Convection Currents 60°N ____ 30°N Warm Air Cool Air ____ 0° 30°S ____ 60°S 90°S ____ ____