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Paper No. 30943-213222
THE CONTRIBUTION OF GROUNDWATER DEPLETION TO GLOBAL MEAN SEA LEVEL RISE

FAMIGLIETTI, James1, LAMBINICIO, Amabella2, AN, Karen1, REAGER, JT1, DRUFFEL-RODRIGUEZ, Rachel3, RICHEY, Alexandra4, and RODELL, Matthew5, (1) Earth System Science, UC Center for Hydrologic Modeling, University of California, Irvine, Irvine, CA 92697-4690, jfamigli@uci.edu, (2) Geology, Mount Holyoke College, South Hadley, MA 01075, (3) UC Center for Hydrologic Modeling, University of California, Irvine, Irvine, CA 92697-4690, (4) Civil and Environmental Engineering, UC Center for Hydrologic Modeling, University of California, Irvine, Irvine, CA 92697-4690, (5) NASA Goddard Space Flight Center, Hydrological Sciences Branch, Greenbelt, MD 20771
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.
Discipline Categories: Marine/Coastal Science, Hydrogeology

Preferred Presentation Type: Poster
See more of: Rapid Sea-Level Rise and Its Impacts: Past, Present, and Future I
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