what is isostatic sea level rise Flashcards
AO1: recent climate change
Since 1880 and the industrial revolution, sea levels
have increased by around 235mm
AO1: predicted climate change
(IPCC) predicts that sea levels may rise between
0.3 - 1.0m by 2100
AO1: what is eustatic sea level change
when global sea levels rise or fall across the whole planet. linked to thermal expansion and global warming
AO1: what is isostatic sea level change
when sea level change in relation to the height of the land. it is a localised change.
AO1 what is isostatic recovery
when ice glaciers melt it causes the coastline to rebound and rise again in the areas that were covered by ice. in the uk the south east subsides 1mm a year
AO1: major changes in the last 10,000
sea level increase slowed around 8,000 years ago , and levelled
at the current height around 3000 years ago
AO1: what are emergent landforms
he land has been raised in relation to the coastline, landforms such as arches, stacks and stumps and raised beaches
AO1: what are submergent landforms
Landforms of submergence occur when the sea level rises or the coastline sinks in relation to the sea
raised beaches (emergent)
when sea levels fall, a wave cut platform and its beach may be left behind forming a raised beach. some however are caused by isostatic movement
marine platforms (emergent)
same formation as raised beaches however are large and gently sloping. caused by high wave energy, increased from highe rlevels of storm surges
rias (submergen)
flooded river valleys by the coast
fjords (submergent)
flooded glacial valleys creating natural inlets. deeper in the middle section than they are at the mouth
dalmation coasts (submergent)
when valleys running parallel to the coast
become flooded
leaves a series of narrow, long rugged islands
best examples can be seen in Croatia.
holderness coast processes
-storm surges, strong waves from north east = long fetch
-6km spit and retreating cliffs
-uses a shoreline management plan
-rapid erosion worsened by climate change
pevensey bay processes
–long shore drift
-drainage systems less than 10m above sea level
-50km squared permanantly flooded
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