Print Email Facebook Twitter Antarctic outlet glacier mass change resolved at basin scale from satellite gravity gradiometry Title Antarctic outlet glacier mass change resolved at basin scale from satellite gravity gradiometry Author Bouman, J. Fuchs, M. Ivins, E. Van der Wal, W. Schrama, E.J.O. Visser, P.N.A.M. Horwath, M. Faculty Aerospace Engineering Department Space Engineering Date 2014-08-20 Abstract The orbit and instrumental measurement of the Gravity Field and Steady State Ocean Circulation Explorer (GOCE) satellite mission offer the highest ever resolution capabilities for mapping Earth's gravity field from space. However, past analysis predicted that GOCE would not detect changes in ice sheet mass. Here we demonstrate that GOCE gravity gradiometry observations can be combined with Gravity Recovery and Climate Experiment (GRACE) gravity data to estimate mass changes in the Amundsen Sea Sector. This refined resolution allows land ice changes within the Pine Island Glacier (PIG), Thwaites Glacier, and Getz Ice Shelf drainage systems to be measured at respectively ?67?±?7, ?63?±?12, and ?55?±?9 Gt/yr over the GOCE observing period of November 2009 to June 2012. This is the most accurate pure satellite gravimetry measurement to date of current mass loss from PIG, known as the “weak underbelly” of West Antarctica because of its retrograde bed slope and high potential for raising future sea level. Subject basin-scale ice mass changeAmundsen Sea Sector, Antarcticasatellite gravimetry To reference this document use: http://resolver.tudelft.nl/uuid:b1ae5c0c-ac8c-4650-a53f-361887f8b31a DOI https://doi.org/10.1002/2014GL060637 Publisher American Geophysical Union Embargo date 2015-02-20 ISSN 0094-8276 Source Geophysical Research Letters, 41 (16), 2014 Part of collection Institutional Repository Document type journal article Rights © 2014 American Geophysical Union Files PDF vanderWal_2014.pdf 2.99 MB Close viewer /islandora/object/uuid:b1ae5c0c-ac8c-4650-a53f-361887f8b31a/datastream/OBJ/view