UMass Amherst GEO-SCI 103 - Sea Level Rise and Coastal Hazards (3 pages)

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Sea Level Rise and Coastal Hazards



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Sea Level Rise and Coastal Hazards

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Examination of storm surges on coastlines and beaches in addition to causes and effects of global warming and rising sea levels.


Lecture number:
21
Pages:
3
Type:
Lecture Note
School:
University of Massachusetts Amherst
Course:
Geo-Sci 103 - Intro Oceanography GenEd: PS
Edition:
1

Unformatted text preview:

GEO SCI 103 Lecture 21 Outline of Current Lecture Sea Level Rise and Coastal Hazards pgs 250 257 I II III Storm Surge and Tsunami Coastal Hazards Global Warming and the Ocean System Sea level Rise and Shoreline Retreat Current Lecture I Storm Surge and Tsunami Coastal Hazards Coastline can be altered dramatically in a matter of hours with severe storm strikes to the shore Erosion bound to occur mounds of sand The intensity of a storm surge can reach over dunes on a beach causing widespread erosion and property destruction A Storm Surge a Water pushed strongly landward by winds and the forward direction of storm track b Surface of water is doomed up under intense low pressure of storm c Danger further compounded if landfall coincides with high tide d Strong onshore flow to the right eye area of greatest danger threat of storm surge e Where winds are pushing on the shore increasing the energy of the advancing water f Associated with extra tropical storms that form on the outside tropics like the nor easters that occur along the East coast during winter g Water and waves can breach the barrier dunes causing sand to be deposited in washover fans on the landward side of the dunes h Pushes beach landward as it adjusts to sea level changes and all other coastal environments retain their original position relative to the beach as they move gradually farther inland B Tsunami a Large waves generated by major earthquakes b Associated with subduction of oceanic crust These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute c Long wavelength L 200 km d Height at outset is low but because of long wavelength they move fast e Height increases and speed slows as they move away from epicenter C Hurricane a Large powerful tropical cyclone feeds on heat of ocean b Intense low atmospheric pressure circulation is counterclockwise in the N Hemisphere clockwise in the S Hemisphere c Strong



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