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Air-Sea Interactions. Winds Pressure systems Sea ice. Global winds. Uneven heating of earth Convection Start with flattened earth Then transfer to rounded earth. EQ. SP. NP. Coriolis effect. Occurs on Earth because it rotates
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Air-Sea Interactions Winds Pressure systems Sea ice
Global winds • Uneven heating of earth • Convection • Start with flattened earth • Then transfer to rounded earth EQ SP NP
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
All see table 6.2, p. 173
Sea Breeze Local winds Land Breeze
Regional pattern • Monsoon circulation Summer Winter
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
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
“Pancakes” become larger as ice coalesces Courtesy of J. Phillips-Kress
Ice floes are forming Courtesy of J. Phillips-Kress
Polar ice….vast expanses that remain year-round Courtesy of US Navy
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
Alaskan glacier Courtesy of M.S. Bollinger
Iceberg in Alaska Courtesy of M.S. Bollinger