AQA Geography Unit 1 May 14th 2013

Discuss the impact(s) of rising sea levels on coastal environments. (15 marks) ????

Explain the causes of sea level change and the formation of resultant coastal
landforms. (15 marks)

Help?? What case studies can I use for this

These are how its caused but what case studies??

Eustatic change is a global change in sea level relative to the land.
These can be a fall in sea level – as occurred during glaciations or a
rise in sea level as is the current situation. This is the result of water
being added following temperatures warming, glaciers melting and
thermal expansion as oceans warm. Current concern regarding global
warming would come into this category.
Isostatic change occurs on a local level. Again, relative change may
be positive or negative. This is the result of ice melting on land masses
and the loss of the additional weight causing land masses to readjust
and ‘bounce up’. Similarly, plate movement at subduction zones may
cause the land to rise relative to the sea. Conversely, with additional
weight e.g. where there are deltas being created of substantial size, the
land will sink due to the additional weight.
Landforms resulting from sea level increase/land sinking – fjords,
rias are likely landforms; estuaries, (submerged forest) are also
creditable.
Landforms resulting from sea level decrease/land rising – raised
beaches and fossil cliff lines are likely responses. Explanation should
be given.
Reference to impact of sea level change on coral reefs is valid.

We're doing that as a timed essay tomorrow, we were told to talk about coastal flooding and the effect that will have on the surrounding area, property, ecosystems, infrastructure, construction of new defences (e.g. Thames barrier after 1953 storm surge) etc and then move on to talk about some submergent coastline features, so rias and fjords


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There aren't any case studies for this question


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Thames barrier after 1953 storm surge? Have you got this typed up can you send it to me please? Thanks.




No as in examles of where those features are?

I was gonna say haha


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Explain the causes of sea level change and the formation of resultant coastal
landforms. (15 marks)

Help?? What case studies can I use for this

These are how its caused but what case studies??

Eustatic change is a global change in sea level relative to the land.
These can be a fall in sea level – as occurred during glaciations or a
rise in sea level as is the current situation. This is the result of water
being added following temperatures warming, glaciers melting and
thermal expansion as oceans warm. Current concern regarding global
warming would come into this category.
Isostatic change occurs on a local level. Again, relative change may
be positive or negative. This is the result of ice melting on land masses
and the loss of the additional weight causing land masses to readjust
and ‘bounce up’. Similarly, plate movement at subduction zones may
cause the land to rise relative to the sea. Conversely, with additional
weight e.g. where there are deltas being created of substantial size, the
land will sink due to the additional weight.
Landforms resulting from sea level increase/land sinking – fjords,
rias are likely landforms; estuaries, (submerged forest) are also
creditable.
Landforms resulting from sea level decrease/land rising – raised
beaches and fossil cliff lines are likely responses. Explanation should
be given.
Reference to impact of sea level change on coral reefs is valid.

Essex marshes?


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?? expand please

The salt marshes at Essex are disappearing due to coastal squeeze. Rising sea levels mean that the sea is rising over the salt and is pinned against sea wall causing erosion - this is coastal squeeze. They've introduced soft engineering


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I was gonna say haha


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Ahh I think you mean sucesscssion...its turning into land with essex at abbots hall farm.
Essex is very broad, you need to be more specific

Knowing the above, explain what you mean again.....................

The salt marshes at Essex are disappearing due to coastal squeeze. Rising sea levels mean that the sea is rising over the salt and is pinned against sea wall causing erosion - this is coastal squeeze. They've introduced soft engineering


Posted from TSR Mobile

Ahh I think you mean sucesscssion...its turning into land with essex at abbots hall farm.
Essex is very broad, you need to be more specific

Knowing the above, explain what you mean again.....................

Got a whole set of revision notes for Population, Health, Deserts and Rivers coming up

Here are notes:

And I forgot to add - here is the JAN 2013 paper.