Sea level change

Question 1

what is relative sea level change

Answer 1

height of ocean surface relative to earths surface

Question 2

isostatic

Answer 2

sea level rise due to tectonics

Question 3

eustatic

Answer 3

sea level rise due to climate movement (ice melt)

Question 4

steric expansion

Answer 4

ocean warms and expands

Question 5

glacio isostasy

Answer 5

glaciers cause uplift of land and when they melt sea levels rise

Question 6

sedimentation

Answer 6

increased sea bed

Question 7

what sea level causes happen in uk

Answer 7

all apart from tectonics (isostatic)

Question 8

main driver of sea level change

Answer 8

melting glaciers

Question 9

evidence of past sea level change

Answer 9

fossils/corals, coastal terraces, deep sea sediments, saltmarsh sediments, proxies in saltmarshes

Question 10

fossils/corals

Answer 10

rising sea levels mean corals grow further up seabed, low means coral death

Question 11

coastal terraces

Answer 11

erosion and deposition of coasts

Question 12

deep sediments

Answer 12

benthic foraminifera

Question 13

saltmarsh sediments/proxies

Answer 13

saltmarshs are good at recording climate data as less deposition/erosion and gentle waves

Question 14

saltmarsh zones

Answer 14

open water, tidal flat (rocky), low marsh, high marsh, transition marsh, undeveloped/developed land