1 Hurricane characteristics Sustained winds of 120 km or more Sustained winds of 120 km or more Sea…
Air-Sea Interactions Winds Pressure systems Sea ice.
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Transcript of Air-Sea Interactions Winds Pressure systems Sea ice.
Air-Sea Interactions
WindsPressure systemsSea ice
Global winds
Uneven heating of earth Convection
Start with flattened earthThen transfer to rounded earth
SP NPEQ
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
All see table 6.2, p. 173
DESERTS: Some located due to global air circulation
Sea Breeze
Land Breeze
Regional pattern
Monsoon circulation
Summer Winter
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
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
Pancake Ice
“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
Glacier along a coast
Alaskan glacier
Courtesy of M.S. Bollinger
Iceberg in Alaska
Courtesy of M.S. Bollinger