Basal Slippage

•Divide your A3 sheet into four.

•Copy the sketch diagram as it progresses.

•When prompted , swop your sheet with a partner and begin a new diagram on a new

section of the A3 sheet.

•The process will increase in speed with each diagram.

Snow fall

Accumulates and

compresses – ice sheet

Snow fall

Accumulates and


Pressure causes basal

melt.

Snow fall

Accumulates and



melt.

Ice sheet moves-Lubricated due to

basal melt and gravity- basal

slippage.

Snow fall

Accumulates and



melt.



slippage.

Ice sheet flow out onto the sea- ice

shelf.

Snow fall

Accumulates and



melt.



slippage.


shelf.

Calving occurs in summer

Iceberg

Snow fall

Accumulates and


Snow fall

Accumulates and



melt.

Snow fall

Accumulates and



melt.



slippage.

Snow fall

Accumulates and



melt.



slippage.


shelf.

Snow fall

Accumulates and



melt.



slippage.


shelf.


Iceberg

Snow fall

Accumulates and


Snow fall

Accumulates and



melt.

Snow fall

Accumulates and



melt.



slippage.

Snow fall

Accumulates and



melt.



slippage.


shelf.

Snow fall

Accumulates and



melt.



slippage.


shelf.


Iceberg

Snow fall

Accumulates and


Snow fall

Accumulates and



melt.

Snow fall

Accumulates and



melt.



slippage.

Snow fall

Accumulates and



melt.



slippage.


shelf.

Snow fall

Accumulates and



melt.



slippage.


shelf.


Iceberg

Education

Basal Slippage