Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric...

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Warm ocean is eroding WAIS 1 st October WAIS 2004 Slide 1 Andrew Shepherd 1 , Duncan Wingham 2 , Eric Rignot 3 1 Scott Polar Research Institute 2 University College London 3 Jet Propulsion Laboratory Warm ocean is eroding WAIS

Transcript of Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric...

Page 1: Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric Rignot 3 1 Scott Polar Research Institute 2 University.

Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 1

Andrew Shepherd1, Duncan Wingham2, Eric Rignot3

1Scott Polar Research Institute2University College London3Jet Propulsion Laboratory

Warm ocean is eroding WAIS

Page 2: Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric Rignot 3 1 Scott Polar Research Institute 2 University.

Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 2

Andrew Shepherd1, Duncan Wingham2, Eric Rignot3

1Scott Polar Research Institute2University College London3Jet Propulsion Laboratory

Warm ocean is eroding WAIS…consistently

Page 3: Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric Rignot 3 1 Scott Polar Research Institute 2 University.

Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 3

Andrew Shepherd1, Duncan Wingham2, Eric Rignot3

1Scott Polar Research Institute2University College London3Jet Propulsion Laboratory

Warm ocean is eroding WAIS…consistently…at a constant rate

Page 4: Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric Rignot 3 1 Scott Polar Research Institute 2 University.

Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 4

Grounding line retreat

Page 5: Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric Rignot 3 1 Scott Polar Research Institute 2 University.

Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 5

Elevation change (m / year)

-3 0Ice speed (km / year)

0 2.5

Grounded ice thinning

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PIG acceleration

Joughin et al., GRL, 2003

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Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 7

Ice shelf lowering

Page 8: Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric Rignot 3 1 Scott Polar Research Institute 2 University.

Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 8

Ice shelf lowering

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1st October WAIS 2004 Slide 9

Ice shelf thinning

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1st October WAIS 2004 Slide 10

Steady state melting

After Joughin et al., GRL, 2003

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1st October WAIS 2004 Slide 11

Net melting

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1st October WAIS 2004 Slide 12

Oceanographic data

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Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 13

Oceanographic data

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Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 14

Oceanographic data

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Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 15

Oceanographic data

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1st October WAIS 2004 Slide 16

Ocean melting

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Glacier mass balance

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Warm ocean is eroding WAIS

1st October WAIS 2004 Slide 18

Ice shelf mass balance

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1st October WAIS 2004 Slide 19

Total mass balance

Page 20: Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric Rignot 3 1 Scott Polar Research Institute 2 University.

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1st October WAIS 2004 Slide 20

Constant sea level rise

Page 21: Warm ocean is eroding WAIS 1 st OctoberWAIS 2004 Slide 1 Andrew Shepherd 1, Duncan Wingham 2, Eric Rignot 3 1 Scott Polar Research Institute 2 University.

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1st October WAIS 2004 Slide 21

Constant sea level rise

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1st October WAIS 2004 Slide 22

Constant sea level rise

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1st October WAIS 2004 Slide 23

Constant sea level rise


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