What s happening in the bathtub an overview of present day sea level change
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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 Sciences Colorado Center for Astrodynamics Research Cooperative Institute for Research in Environmental Sciences. Satellite Altimetry.

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What s happening in the bathtub an overview of present day sea level change
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


Satellite altimetry
Satellite Altimetry

Trend = 3.4 mm/year

http://sealevel.colorado.edu




Grace gravity recovery and climate experiment
GRACEGravity Recovery and Climate Experiment



Greenland mass change from grace
Greenland Mass Change from GRACE

Total Greenland ice volume

Rate of mass change during April, 2002 – February, 2009

Rate of mass change:

All Greenland: -235 Gton/yr

South Greenland: -169 Gton/yr

North Greenland: -65 Gton/yr

362 Gt/yr = 362 km3/year water

= 1 mm/yr sea level rise

[Wahr, 2009]

-235 Gton/yr = 0.65 mm/yr sea level rise



Antarctica mass change from grace
Antarctica Mass Change from GRACE

Total Antarctic ice volume.

April, 2002 – February, 2009

Rate of mass change after removing ICE5G rebound model:

All Antarctica: -169 Gton/yr

West Antarctica: -128 Gton/yr

East Antarctica: -36 Gton/yr

Amundsen Sea glaciers

Uncertainty of post-glacial rebound correction:

All Antarctica: ± 75 km3/yr

West Antarctica: ± 20 km3/yr

East Antarctica: ± 50 km3/yr

-169 Gton/yr = 0.47 mm/yr sea level rise

[Wahr, 2009]


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