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

Talpe, Matthieu J., Nerem, R. Steven, Forootan, Ehsan ORCID: https://orcid.org/0000-0003-3055-041X, Schmidt, Michael, Lemoine, Frank G., Enderlin, Ellyn M. and Landerer, Felix W. 2017. Ice mass change in Greenland and Antarctica between 1993 and 2013 from satellite gravity measurements. Journal of Geodesy 91 (11) , pp. 1283-1298. 10.1007/s00190-017-1025-y

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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 to combine high-resolution spatial modes from the Gravity Recovery and Climate Experiment (GRACE) mission with the gravity information from conventional satellite track-ing 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 coe�cients re ected 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 in uenced by interannual variations.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Uncontrolled Keywords:	time-variable Gravity � Mass Change � Greenland � Antarctica
Publisher:	Springer Verlag
ISSN:	0949-7714
Date of First Compliant Deposit:	15 May 2017
Date of Acceptance:	18 April 2017
Last Modified:	07 Nov 2023 16:41
URI:	https://orca.cardiff.ac.uk/id/eprint/100560

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