Global Climates Weather is what happens over a short period; Climate includes conditions in an area over a long time.

Convection in the Atmosphere

Air Pressure Belts

Rainfall

The World’s Deserts

The Great Boreal Forests Why are there no great austral (southern) forests?

Prevailing Wind Direction - Remember Coriolis

How did Colombus sail to the New World?

Figure 3.17 Right turn in the northern hemisphere, and left turn in the southern hemisphere.

Coriolis causes surface currents to move at a 45 angle from the wind. Figure 3.19 Coriolis causes surface currents to move at a 45 angle from the wind.

Figure 3.21 Look at how high the pink (warm) is on the east coast and how low pink is on the west coast. This warms poles and cools tropics. Studies indicate that changes in circulation may cause climate change

Figure 3.24 The ocean has three main layers, the thin warm surface layer, the intermediate layer (main thermocline), and cold deep bottom layer.

There are other currents in the ocean. The great conveyer belt. Figure 3.25 There are other currents in the ocean. The great conveyer belt.

Figure 3.26

Figure 3.27

Figure 3.28

Figure 3.29