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- Title
Minimizing the effects of filtering on catchment scale GRACE solutions.
- Authors
Dutt Vishwakarma, Bramha; Devaraju, Balaji; Sneeuw, Nico
- Abstract
The Gravity Recovery and Climate Experiment ( grace) satellite mission has provided time variable gravity information since its launch in 2002. Due to short-wavelength noise, the total water storage variations over a catchment observed from grace are usable only after filtering. Filtering smooths both the signal and the noise, inevitably changing the nature of the estimated total water storage change. The filtered estimates suffer from attenuation and leakage, which changes the signal characteristics. Several studies have mainly focused on correcting the changed amplitude with the aid of hydrological models. In this study, it is demonstrated that in addition to the amplitude loss, also significant phase change in the time series of total water storage over a region can occur. The phase change due to leakage from nearby catchments can be around
- Subjects
WATERSHEDS; SIGNAL filtering; WATER storage; AQUIFER storage recovery; HYDROLOGICAL databases
- Publication
Water Resources Research, 2016, Vol 52, Issue 8, p5868
- ISSN
0043-1397
- Publication type
Article
- DOI
10.1002/2016WR018960