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Time-Varying Gravity Models from GRACE Data over NW Australia

This study focuses on the time-varying gravity models derived from GRACE satellite data over Northwest Australia, specifically analyzing the changes in the Earth's gravity field from 2002 to 2010. The research highlights the implications of gravity changes on phenomena such as ice melt and drought in the Murray-Darling Basin, using various data sources including ground-based gravity surveys and hydrological models. Collaborators include NASA/JPL, the University of Texas, and other global research institutions.

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Time-Varying Gravity Models from GRACE Data over NW Australia

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  1. Time-Varying Gravity Models from GRACE Data over NW Australia Lily Yu, IIP/PEI Summer 2010 Research School for the Earth Sciences, ANU Image: NASA/JPL

  2. Background • The geoid • Observing ice melt and droughts • The GRACE satellites • The researchers: NASA/JPL, CSR at University of Texas, CNES/GRGS, GeoForschungsZentrum Potsdam (GFZ)

  3. Error

  4. The Problem Gravity field change, 2002-2008 Gravity field change, 2008-2010

  5. The Problem Gravity field change, 2002-2010 ? Murray-Darling Basin drought, 2001-present

  6. The Problem with the Problem Ground-based gravity surveys by WA Mining and Petroleum River Monitoring Stations Rainfall Monitoring Stations

  7. GRGS ECMWF-based Dealiasing Products

  8. GLDAS Hydrological Model

  9. Further Inquiries • Biomass (NVIS) • National Water Commission’s future mapping projects • Seismological data

  10. Acknowledgements • Paul Tregoning, supervisorRSES, ANU • Emma-Kate PotterRSES, ANU • Tony PurcellRSES, ANU • Charlotte AllenRSES, ANU • IIP/PEI

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