MYTUTOR SUBJECT ANSWERS

779 views

With respect to sea level change, what is the difference between eustacy and isostasy?

Eustacy and isostasy are ways of describing relative sea level change which is a measure of changes in the level (height) of the sea, relative to the land.

Eustatic sea level change describes a change in the volume of the sea in ocean basins. This is caused by either a change in the amount of water in the basins (for example, an addition of water from melting ice sheets) or by a change in the size of the ocean basins (such the formation of new continental crust, reducing the capacity of the basins).

Eustatic change causes a global rise or fall in sea level.

Isostatic sea level change occurs due to the movement of the land in relation to the sea in specific areas and hence causes a local change in sea level. Isostasy is a process by which the Earth’s crust attempts to reach an equilibrium balance with the mantle it is floating on. Hence isostatic sea level change occurs when the Earth’s crust rises of falls relative to the sea, often due to an increase or decrease of mass on top of the crust.

For example, during an ice age, the crust becomes heavier due to the mass of ice on top of it, and sinks into the mantle to remain buoyant and in equilibrium, leading to an apparent increase in sea level relative to the land.

When measuring change in sea level, both isostatic and eustatic sea level changes must be taken into consideration to measure the total amount of change.  

Emily H. A Level Geography tutor, GCSE Biology tutor, A Level Psychol...

2 years ago

Answered by Emily, an A Level Geography tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

44 SUBJECT SPECIALISTS

£26 /hr

Tom P.

Degree: Geography (Bachelors) - Durham University

Subjects offered: Geography, -Personal Statements-

Geography
-Personal Statements-

“In the session, I hope to use a variety of tools (analogies, diagrams, flowcharts) to help enhance understanding of a topic. In addition exam questions will be used to further reinforce key theories and ideas”

£30 /hr

Thomas D.

Degree: Economics (Bachelors) - Bristol University

Subjects offered: Geography, Maths+ 2 more

Geography
Maths
Further Mathematics
Economics

“Why choose me? I am a highly academic student having achieved 4 A* at A level but also have excellent communication and mentoring skills havingtutored fellow students at school and beenHead Boy. I am honest, reliable and precise, if ...”

£30 /hr

Edward H.

Degree: Geography (Masters) - Oxford, Balliol College University

Subjects offered: Geography, Music+ 7 more

Geography
Music
Maths
Mandarin
French
English
Chemistry
.TSA. Oxford.
-Personal Statements-

“I am a Geography student at Oxford University, but I also have experience tutoring in Maths, Chemistry, English, French, Mandarin Chinese, and Music. I am an ethusiastic and dedicated individual, tailoring my classes to the needs of ea...”

About the author

Emily H.

Currently unavailable: for new students

Degree: Bsc Geography (Bachelors) - Durham University

Subjects offered: Geography, Science+ 4 more

Geography
Science
Psychology
Biology
-Personal Statements-
-Oxbridge Preparation-

“Enthusiastic and friendly Durham Geography student excited to provide help in geography, psychology, science GCSE and personal statements”

MyTutor guarantee

You may also like...

Posts by Emily

What is the difference between a gene, a chromosome and DNA?

What is the difference between the biological and behavioural psychological approaches?

With respect to sea level change, what is the difference between eustacy and isostasy?

Other A Level Geography questions

What causes isostatic rebound?

What are the effects of TNCs is both the countries they operate in and their home countries?

If i'm planning an essay for a question on regeneration in a specific area, how would I organise my paragraphs?

I do not understand the concept of environmental feedbacks. Could you help explain it to me using examples?

View A Level Geography tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok