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Paper No. 4
Presentation Time: 9:00 AM

THE CONTRIBUTION OF GROUNDWATER DEPLETION TO GLOBAL MEAN SEA LEVEL RISE


FAMIGLIETTI, James1, LAMBINICIO, Amabella2, AN, Karen3, REAGER, J.T.3, DRUFFEL-RODRIGUEZ, Rachel4, RICHEY, Alexandra5 and RODELL, Matthew6, (1)Earth System Science, University of California, Irvine, Irvine, CA 92697-3100, (2)Geology, Mount Holyoke College, South Hadley, MA 01075, (3)Earth System Science, UC Center for Hydrologic Modeling, University of California, Irvine, Irvine, CA 92697-4690, (4)UC Center for Hydrologic Modeling, University of California, Irvine, Irvine, CA 92697-4690, (5)Civil and Environmental Engineering, UC Center for Hydrologic Modeling, University of California, Irvine, Irvine, CA 92697-4690, (6)NASA Goddard Space Flight Center, Hydrological Sciences Branch, Greenbelt, MD 20771, jfamigli@uci.edu

The contribution of groundwater depletion to Global Mean Sea Level Rise (GMSLR) is an important topic and source of great uncertainty in the GMSLR budget. This research uses gridded GRACE Tellus satellite data to quantify changes in total land water storage, including those of groundwater. Global Land Data Assimilation System land components such as soil moisture, canopy moisture, and snow, are subtracted from the GRACE data to isolate the groundwater component. The resulting trends show that most continents are gaining in groundwater storage, which is consistent with GRACE-based estimates of zero-to-increasing changes in total land water. Results indicate a negative contribution to current rates of GMSLR for the GRACE time period, which is in contrast to the long term, positive contribution identified in recent studies.

Session No. 14

T121. Rapid Sea-Level Rise and Its Impacts: Past, Present, and Future I
Sunday, 4 November 2012: 8:00 AM-12:00 PM
219AB (Charlotte Convention Center)
Geological Society of America Abstracts with Programs. Vol. 44, No. 7, p.54
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