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12 Cards in this Set
- Front
- Back
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how much does the sea level rise each year ?
How much has the sea risen to date? how much have the beaches retreated? |
2mm rise per year
12cm current sea rising, there has been 12 meter retreat, 70% of the sandy beaches retreated. |
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who was awarded the noble peace prize in 2007?
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the IPCC with Al Gore: intergovernmental panel on climate control.
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What did the IPCC say is the estimated sea rise by year 2100?
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the estimated climate change is between 9cm- 88cm
the medium of this is between 21cm-70cm. |
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what makes sea level vary?
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water is tied up in Ice sheets and mountain glaciers.
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how much would the sea level rise if the antarctic and greenland ice sheets melt?
is this likely to happen? |
then the sea level would rise from 50-100 meters
this is unikely to happen anytime soon. max = 7 meters |
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What accounts for the 12cm sea level rise?
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7cmis accoutned by retreat of mountain glaciers and ice sheets
5 cm accounts for warming |
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what are the type of currents?
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Longshore Current
Rip Current |
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what is a longshore current?
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type of beach drift. the longshore current goes into shore at an angle and then back out to sea perpendicular.
This moves sand along coastline |
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What is a Rip Current?
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in a rip curent the current goes to shore perpendicular and makes everything concentrated in one area that pulls out to sea.
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What makes beach dynamic systems?
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The is always sand going in and out. if that is not the case then there is erosion.
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what are the ways of coastal engineering?
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groins
Jetties Breakwaters SeaWalls Beach renourishment |
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What is bad about seawall?
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Seawalls don't last long because of scouring. the waves crashing on the wall crashes down making the beach disappear.
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