Journal of Geodesy

, Volume 91, Issue 11, pp 1283–1298 | Cite as

Ice mass change in Greenland and Antarctica between 1993 and 2013 from satellite gravity measurements

  • Matthieu J. Talpe
  • R. Steven Nerem
  • Ehsan Forootan
  • Michael Schmidt
  • Frank G. Lemoine
  • Ellyn M. Enderlin
  • Felix W. Landerer
Original Article

Abstract

We construct long-term time series of Greenland and Antarctic ice sheet mass change from satellite gravity measurements. A statistical reconstruction approach is developed based on a principal component analysis (PCA) to combine high-resolution spatial modes from the Gravity Recovery and Climate Experiment (GRACE) mission with the gravity information from conventional satellite tracking data. Uncertainties of this reconstruction are rigorously assessed; they include temporal limitations for short GRACE measurements, spatial limitations for the low-resolution conventional tracking data measurements, and limitations of the estimated statistical relationships between low- and high-degree potential coefficients reflected in the PCA modes. Trends of mass variations in Greenland and Antarctica are assessed against a number of previous studies. The resulting time series for Greenland show a higher rate of mass loss than other methods before 2000, while the Antarctic ice sheet appears heavily influenced by interannual variations.

Keywords

Time-variable Gravity Mass change Greenland Antarctica 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Matthieu J. Talpe
    • 1
  • R. Steven Nerem
    • 1
  • Ehsan Forootan
    • 2
  • Michael Schmidt
    • 3
  • Frank G. Lemoine
    • 4
  • Ellyn M. Enderlin
    • 5
  • Felix W. Landerer
    • 6
  1. 1.Aerospace Engineering SciencesUniversity of Colorado Boulder, Colorado Center for Astrodynamics ResearchBoulderUSA
  2. 2.School of Earth and Ocean SciencesCardiff UniversityCardiffUK
  3. 3.Deutsches Geodätisches Forschungsinstitut (DGFI)Technische Universität MünchenMunichGermany
  4. 4.Planetary Geodynamics LaboratoryNASA Goddard Space Flight CenterGreenbeltUSA
  5. 5.Climate Change InstituteUniversity of MaineOronoUSA
  6. 6.Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaUSA

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