Articles | Volume 22, issue 3
https://doi.org/10.5194/hess-22-1811-2018
https://doi.org/10.5194/hess-22-1811-2018
Research article
 | 
13 Mar 2018
Research article |  | 13 Mar 2018

On the use of the GRACE normal equation of inter-satellite tracking data for estimation of soil moisture and groundwater in Australia

Natthachet Tangdamrongsub, Shin-Chan Han, Mark Decker, In-Young Yeo, and Hyungjun Kim

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Cited articles

Australian Bureau of Meteorology: Record-breaking La Niña events: An analysis of the La Niña life cycle and the impacts and significance of the 2010–11 and 2011–12 La Niña events in Australia, National Climate Centre, Bureau of Meteorology, http://www.bom.gov.au/climate/enso/history/La-Nina-2010-12.pdf (last access: 5 January 2017), 2012. 
Bettadpur, S.: CSR Level-2 Processing Standards Document for Product Release 05, GRACE 327-742, Center for Space Research, The University of Texas, Austin, 2012. 
Chen, J. L., Wilson, C. R., Tapley, B. D., Scanlon, B., and Güntner, A.: Long-term groundwater storage change in Victoria, Australia from satellite gravity and in situ observations, Global Planet. Change, 139, 56–65, https://doi.org/10.1016/j.gloplacha.2016.01.002, 2016. 
Decker, M.: Development and evaluation of a new soil moisture and runoff parameterization for the CABLE LSM including subgrid-scale processes, J. Adv. Model. Earth Syst., 7, 1788–1809, https://doi.org/10.1002/2015MS000507, 2015. 
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Short summary
We present a new approach to improve the water storage estimate. Our approach combines GRACE's raw data (least-squares normal equation) with the results from the Community Atmosphere Land Exchange (CABLE) model. No post-processing filter is applied to GRACE data, and the full GRACE signal and error information are exploited. The approach is applied over 10 Australian river basins, and the evident improvement of the water storage estimate, particularly groundwater component, is clearly observed.