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What's Happening in the Bathtub?: An Overview of Present-Day Sea Level Change R. Steven Nerem University of Colorado Department of Aerospace Engineering.

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Presentation on theme: "What's Happening in the Bathtub?: An Overview of Present-Day Sea Level Change R. Steven Nerem University of Colorado Department of Aerospace Engineering."— Presentation transcript:

1 What's Happening in the Bathtub?: An Overview of Present-Day Sea Level Change R. Steven Nerem University of Colorado Department of Aerospace Engineering Sciences Colorado Center for Astrodynamics Research Cooperative Institute for Research in Environmental Sciences

2 Satellite Altimetry Trend = 3.4 mm/year http://sealevel.colorado.edu

3 Detrended GMSL and MEI

4 Spatial Variations in Sea Level Rise 1993-2009

5 GRACE Gravity Recovery and Climate Experiment

6 GRACE Global Ocean Mass Variations

7 Rate of mass change: All Greenland: -235 Gton/yr South Greenland: -169 Gton/yr North Greenland: -65 Gton/yr Total Greenland ice volume Rate of mass change during April, 2002 – February, 2009 -235 Gton/yr = 0.65 mm/yr sea level rise Greenland Mass Change from GRACE [Wahr, 2009] 362 Gt/yr = 362 km 3 /year water = 1 mm/yr sea level rise

8 Greenland Mass Change from GRACE [Wahr, 2009]

9 Rate of mass change after removing ICE5G rebound model: All Antarctica: -169 Gton/yr West Antarctica: -128 Gton/yr East Antarctica: -36 Gton/yr Uncertainty of post-glacial rebound correction: All Antarctica: ± 75 km 3 /yr West Antarctica: ± 20 km 3 /yr East Antarctica: ± 50 km 3 /yr -169 Gton/yr = 0.47 mm/yr sea level rise Total Antarctic ice volume. April, 2002 – February, 2009 Amundsen Sea glaciers [Wahr, 2009] Antarctica Mass Change from GRACE

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