Glaciology

Question 1

How much sea level rise does glaciers / ice sheets contribute?

Answer 1

65m - ice sheet

0.6m - glacier

Question 2

What is a glacier?

Answer 2

Flowing mass of ice formed from compacted snow that moves under pressure

Question 3

What is steady state?

Answer 3

When ablation = accumulation.

Question 4

What is a response time?

Answer 4

The time that a glacier takes to adjust to a change in mass balance

Question 5

What is latent heat?

Answer 5

Heat changed when a solid moves into a liquid

Question 6

What are the two factors affecting basal sliding?

Answer 6

Regelation and enhanced creep

Question 7

What is regelation?

Answer 7

High pressure to low pressure moving of ice

Question 8

What is the ice stream?

Answer 8

Fast ice is bounded by slower moving ice, which controls flow unlike in glaciers

Question 9

What are the three ice sheets around the world?

Answer 9

West Antarctic, Greenland, East Antarctic

Question 10

what is a ice sheet?

Answer 10

An extensive region of permenant ice cover

Question 11

What is a marine ice sheet?

Answer 11

A ice sheet that is grounded well below the sea

Question 12

What is a ice shelf?

Answer 12

Thick floating platform of ice fed by glaciers

Question 13

What is a ice stream?

Answer 13

Fast moving ice bounded by slower moving ice

Question 14

How do ice sheets lose mass?

Answer 14

Calving, Surface and basal melt

Question 15

How to ice streams flow?

Answer 15

Rehology, mass balance, till base

Question 16

What is the ratio of melting for basal melting?

Answer 16

10:1