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

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

23 Citationer (Scopus)


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.
TidsskriftJournal of Geodesy
Sider (fra-til)1283–1298
Antal sider16
StatusUdgivet - 18 apr. 2017
Udgivet eksterntJa


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