influnece of sea level chnage

Question 1

how can long term sea level change be characterised?

Answer 1

eustatic or isostatic

Question 2

what is eustatic change?

Answer 2

occurs when ice on land melts increasing the volume of water present in the sea.
Usually accompanied by thermal changes

Question 3

what is isostatic change?

Answer 3

occurs from downward movement of land causing localised sea level rise.
land can be stressed downwards from post glacial adjustment, subsidence and accretion

Question 4

what is subsidence?

Answer 4

sinking of land

Question 5

what is accretion?

Answer 5

accumulation of layers pushing down the earth

Question 6

what are emergent coastlines?

Answer 6

result of sea level change- stretch of coast that’s been exposed by the sea

Question 7

what is a submergent coastline?

Answer 7

result of sea level change- stretches along the coast that have been inundated by the sea

Question 8

what effect does global warming have on sea level change?

Answer 8

causes eustatic change as ocean temps warm and particles expand taking up more space in the ocean basin, causing rise in sea level

Question 9

what role does tectonic activity play in sea level change?

Answer 9

causes sea floor spreading creating a larger platform for water to sit on.
also effects shape of basins if they get smaller volume of oceans decrease and sea level rises

Question 10

how does tectonic uplift effect isostatic change?

Answer 10

forces oceans to be at higher platform than the land