Changing sea levels

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Sea level change varies and is not uniform because

differing temperatures leds to differing rates of thermal expansion

different locations of plate boundaries causing diffferent crustal movements leading to different land hieghts and gradients

differeing ice quantites therefore different pressure on land resulting in vaired uplift/subsidence

VULNERABLE PLACES

large river delta - the nile

low lying coastal environment already defended- netherlands

small low lying islands- pacific islands

weak geology therefore high risk of erosion

subsiding land - Bangaladesh delta

salt marshes - Langstone harbour

Isosatic down tilting- S.E England

Areas of dense population on the coast- Lagos

Areas of poverty- live on marginal land, lower capacity to cope

Land has been changed- removal of mangroves

Political issues- inability to afford adaption/migitation

SEA LEVEL CHANGE IS DIFFCULT TO PREDICT BECAUSE

it is a highly complex issue many variables are interrelated

it is diffcult to estimate future greenhouse gas emissions

scientific models are highly complex but there are simplifications of reality and only give us a representation and not a fully explained outcome

Scientific models…

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