ICE STREAMS OF                 THE ANTARCTIC
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ICE STREAMS OF THE ANTARCTIC. The Antarctic Ice Sheets. The East Antarctic Ice Sheet Covers 1.0 x 10 7 km 2 Contains 2.6 x 10 7 km 3 of ice The West Antarctic Ice Sheet Covers 2.0 x 10 6 km 2 Contains 3.3 x 10 6 km 3 of ice. What is an Ice Stream?.

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ICE STREAMS OF THE ANTARCTIC

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Ice streams of the antarctic

ICE STREAMS OF THE ANTARCTIC


The antarctic ice sheets

The Antarctic Ice Sheets

  • The East Antarctic Ice Sheet

    • Covers 1.0 x 107 km2

    • Contains 2.6 x 107 km3 of ice

  • The West Antarctic Ice Sheet

    • Covers 2.0 x 106 km2

    • Contains 3.3 x 106 km3 of ice


What is an ice stream

What is an Ice Stream?

  • Ice Streams are channels of rapidly moving ice within a ice sheet.

  • Ice Streams dynamics can have a significant effect on glacial stability


Where are ice streams found in antarctica

Where are Ice Streams found in Antarctica?

  • There are Ice streams within each of the two major Ice Sheets of Antarctica

    • The East Antarctic Ice Sheet (EAIS)

    • The West Antarctic Ice Sheet (WAIS)

  • The most critical of these are streams are those that flow into the Ross Ice Shelf (RIS) and the Ronne-Filchner Ice Shelf (RFIS)


Ice streams of the antarctic

Siple Dome Ice Streams


Ice stream flow

Ice Stream Flow

  • The Antarctic ice streams flow at rates ranging from 100s to 1000s of meters per year

  • Stoppages and slow downs have been documented to occur rapidly

    • These variations in velocity significantly affect the mass balance of the RIS


Ice stream controls

Ice Stream Controls

  • There are a number of factors that can affect ice stream flow rates

    • Melt Water Availability

    • Geothermal Heat Availability

    • Underlying Topography


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