Downscaling GRACE total water storage change using partial least squares regression
Open Access
- 26 March 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Scientific Data
- Vol. 8 (1), 1-13
- https://doi.org/10.1038/s41597-021-00862-6
Abstract
The Gravity Recovery And Climate Experiment (GRACE) satellite mission recorded temporal variations in the Earth’s gravity field, which are then converted to Total Water Storage Change (TWSC) fields representing an anomaly in the water mass stored in all three physical states, on and below the surface of the Earth. GRACE provided a first global observational record of water mass redistribution at spatial scales greater than 63000 km2. This limits their usability in regional hydrological applications. In this study, we implement a statistical downscaling approach that assimilates 0.5° × 0.5° water storage fields from the WaterGAP hydrology model (WGHM), precipitation fields from 3 models, evapotranspiration and runoff from 2 models, with GRACE data to obtain TWSC at a 0.5° × 0.5° grid. The downscaled product exploits dominant common statistical modes between all the hydrological datasets to improve the spatial resolution of GRACE. We also provide open access to scripts that researchers can use to produce downscaled TWSC fields with input observations and models of their own choice.This publication has 55 references indexed in Scilit:
- A quantile function approach to discharge estimation from satellite altimetry (ENVISAT)Water Resources Research, 2013
- Mumbai 2005, Bihar 2008 Flood Reflected in Mass Changes Seen by GRACE SatellitesJournal of the Indian Society of Remote Sensing, 2013
- Antarctica, Greenland and Gulf of Alaska land-ice evolution from an iterated GRACE global mascon solutionJournal of Glaciology, 2013
- Drought indicators based on model‐assimilated Gravity Recovery and Climate Experiment (GRACE) terrestrial water storage observationsWater Resources Research, 2012
- A continuous satellite‐derived global record of land surface evapotranspiration from 1983 to 2006Water Resources Research, 2010
- Assimilation of GRACE Terrestrial Water Storage Data into a Land Surface Model: Results for the Mississippi River BasinJournal of Hydrometeorology, 2008
- Linking climate change modelling to impacts studies: recent advances in downscaling techniques for hydrological modellingInternational Journal of Climatology, 2007
- A Gauge-Based Analysis of Daily Precipitation over East AsiaJournal of Hydrometeorology, 2007
- A global hydrological model for deriving water availability indicators: model tuning and validationJournal of Hydrology, 2003
- Regional flood frequency estimation with canonical correlation analysisJournal of Hydrology, 2001