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Air-Sea Interactions
WindsPressure systemsSea ice
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Global winds
Uneven heating of earth Convection
Start with flattened earthThen transfer to rounded earth
SP NPEQ
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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 EarthWork on drawings
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All see table 6.2, p. 173
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DESERTS: Some located due to global air circulation
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Sea Breeze
Land Breeze
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Regional pattern
Monsoon circulation
Summer Winter
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Pressure systems
High pressureAir dropping at center of massCoriolis effect kicks in
Low pressure Air rising at center of massCoriolis effect kicks inHurricane is an intense low pressure system
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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
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Pancake Ice
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“Pancakes” become larger as ice coalesces
Courtesy of J. Phillips-Kress
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Ice floes are forming
Courtesy of J. Phillips-Kress
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Polar ice….vast expanses that remain year-round
Courtesy of US Navy
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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
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Glacier along a coast
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Alaskan glacier
Courtesy of M.S. Bollinger
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Iceberg in Alaska
Courtesy of M.S. Bollinger