1. Air-Sea Interactions Winds Pressure systems Sea ice

2. Global winds Uneven heating of earth Convection  Start with flattened earth  Then transfer to rounded earth SPNP EQ

4. Coriolis effect Occurs on Earth because it rotates Water and atmosphere are not firmly attached to solid Earth and lag behind Winds do not flow in straight lines Modify winds for rotating Earth  Work on drawings

5. All see table 6.2, p. 173

6. DESERTS: Some located due to global air circulation

7. Sea Breeze Land Breeze Local winds

8. Regional pattern Monsoon circulation SummerWinter

9. Pressure systems High pressure  Air dropping at center of mass  Coriolis effect kicks in Low pressure  Air rising at center of mass  Coriolis effect kicks in  Hurricane is an intense low pressure system

10. Formation of sea ice From early to late stages: Pancake ice…looks like its name Ice floes…..think of fishing polar bears Pack ice….substantial; melts in summer Polar ice….remains year-round

11. Pancake Ice

12. “Pancakes” become larger as ice coalesces Courtesy of J. Phillips-Kress

13. Ice floes are forming Courtesy of J. Phillips-Kress

14. Polar ice….vast expanses that remain year-round Courtesy of US Navy

15. More ice…but is it sea ice? Ice that forms on land is continental ice Includes glaciers Glaciers interact with oceans via icebergs and shelf ice

16. Glacier along a coast

17. Alaskan glacier Courtesy of M.S. Bollinger

18. Iceberg in Alaska Courtesy of M.S. Bollinger