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Sunday, February 7, 2010

Recent Changes of the Earth's land ice from GRACE: methods, signals and errors, Scott Luthcke et al., AGU Fall Meeting, San Francisco, December 2009: Abstract H13G-02 (693337)

AGU Fall Meeting, San Francisco, December 2009

Session B.3-b: Cryosphere
First Author and presenter: Scott Luthcke

Co-Authors: D. D. Rowlands, J. J. McCarthy, T. Sabaka, F. G. Lemoine, and J. P. Boy


The NASA/DLR Gravity Recovery and Climate Experiment (GRACE) mission has been acquiring ultra-precise inter-satellite K-band range and range-rate (KBRR) measurements providing new observations of the complex evolution of the Earth's land ice. The fidelity of the ice mass flux solutions depends on many factors including solution method, parameterization and processing of the GRACE level 1B data including forward modeling of various non-ice mass signals (e.g. hydrology, oceans, atmosphere). In this talk we present the latest GRACE derived ice mass solutions for the Gulf of Alaska glaciers, Greenland and Antarctica. We compare solutions derived from various solution techniques and explore the impact of forward modeling and parameterization on the final solutions. Solution results as well as errors and limitations will be discussed.

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