Wind and Ocean Currents Global winds Ocean Currents Local winds

Air movement Warm air raises; Cold air sinks moving into the void left be the warm air Air moves from high pressure to low pressure

Global winds What belt Are we in? Westerlies

Ocean Currents Surface Currents –In the upper 1000 m –Driven by temperature –Also know as the global ocean currents Density Currents –Driven by Density –More dense water sinks and where they circulate for 500 to 2000 years

Surface Currents Warm Currents –Driven by Winds (temperature) –Flow away from the equator towards the poles Cold Currents –Driven by Winds (temperature) –Flow away from the poles towards the equator Counter Currents –Flow the opposite of the “wind” currents –They “Fill” in the gaps

Global ocean currents

Doldrums Windless zones at the equator Air moves vertically And current-less zone in the middle of the major ocean basins Water mover around them

Local winds Land Breeze Cool air over the land Warm air over water Cold air slides into the void left by the warm air rising Happens during nighttime Wind blowing from the land Sea breeze Warm air over land Cool air over water Cold air slides into the void left by the warm air rising Happens during daytime Wind blowing from the sea

Land Breeze Wind

Land Breeze Wind

Sea Breeze Wind

Sea breeze Wind