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Estimating ice-sheet mass balance: techniques PowerPoint Presentation
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Estimating ice-sheet mass balance: techniques

Estimating ice-sheet mass balance: techniques

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Estimating ice-sheet mass balance: techniques

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  1. Polar Ice Sheets and Ice Shelves:Mass Balance, Uncertainties, and Potential ImprovementsRobert H Thomas…etc

  2. Estimating ice-sheet mass balance:techniques Mass-budget, compares total snow accumulation with losses by ice discharge and melt runoff Repeated altimetry, to estimate volume changes Temporal changes in gravity, to infer mass changes

  3. Mass budget: uncertainties

  4. Altimetry: uncertainties

  5. GRACE: uncertainties

  6. Greenland Ice Sheet: rates of surface-elevation change (dS/dt)Above (red), and below (blue) ~ 2000-m elevation

  7. Greenland Mass Balance

  8. ERS wavefront over Jakobshavn

  9. Antarctic Surface Elevation Change LIS FRIS AP PIG RIS

  10. Crane Glacier after Larsen breakup airborne lidar profiles measured in 2002 & 2004

  11. Recent mass-balance of Greenland and Antarctica.

  12. Causeso post-glacial memoryo variability/trends in snowfall/meltingo changes in glacier velocities - ice shelves - basal lubrication - ????

  13. Sea-level change and the cryosphere, June 2006