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23 Cards in this Set
- Front
- Back
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Tropical Storms
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Storms that have warm air and develop over warm water
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Extratropical Storms
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Storms in which warm & cold air meet at mid lattitudes
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Perihelion
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When the earth is closest to the sun - 4% increase in tides
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Aphelion
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When the earth is furthest away from the sun
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Perigee
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When the moon is closest to the earth - 13% increase in tide
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Apogee
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When the moon is furthest away from the earth
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Spring Tide
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When the earth & the moon & the sun are lined up together, (syzygy), and are working together to make a really large tide
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Neap Tide
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When the sun and the moon are perpendicular to each other, meaning that they are working against each other, therefore the smallest tides form
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Amphidromic Point
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Point at the center of an amphidromic system around which the tidal wave rotates - at this point, there are no tides
-the further you move away from the point, the stronger the tide is |
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Flaser Bed
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When mud accumulates over sandy ripples during slack tides
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According to the Beach Resort Model, the development stage at which the number of visitors to the coast remains constant over time is:
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Stagnation
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The most damaging sort of storm makes landfall: (orientation)
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perpendicular to the coast
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The deepest part of a tidal inlet/delta system is:
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the throat
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Filter feeding and associated fecal pellet deposition by oysters in back-barrier settings:
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leads to muddy sediment deposition.
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The average lifetime of a beach replenishment project in the United States is:
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Less than 5 years
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The most important cause of storm surge is:
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Wave setup
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To accommodate sea-level rise usually means that a beach community:
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Accommodates by replenishing the beach with sand
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Salt marshes began forming along the Maine coast:
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5,000 years ago
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An important mechanism by which barrier islands move landward as sea level rises is:
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Washover
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How low was world sea level at the time of maximum glaciation? How long ago was this?
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The lowest level of the sea at the time of maximum glaciation was 120m below current sea level, and occurred about 18,000 years ago
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List 4 ways people have impacted salt marshes.
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1. Salt hay - eaten by grazing animals
2. Dredge & fill 3. Mosquito ditches 4. Culverts (reduce amount of salt water that comes in |
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List 4 Mechanisms for trapping sediment landward of inlets in back-barrier (marsh & tidal flat) settings.
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1. Time-velocity asymmetry
2. Settle/scour lag 3. Filter feeding organisms 4. Biological remains |
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List 3 indicators of higher-than-present sea level in Maine.
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1. Emergent Deltas
2. Emergent Beaches 3. Emergent marine sediment |
