Open AccessDOI
Comparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach
Emad Hasan,Emad Hasan,Emad Hasan,Aondover Tarhule +3 more
- Vol. 13, pp 100108
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TLDR
In this article, a modified triple collocation (MTC) approach was used to evaluate the TWS (terrestrial water storage) trend estimations from 11 gridded GRACE products of RL05 and RL06 releases between 2002 and 2017.Abstract:
GRACE (Gravity Recovery and Climate Experiment) and GRACE-FO (Follow-On) satellites have provided unique insights into the evolution of Terrestrial Water Storage (TWS) in space and time. Despite such advancements, various GRACE solutions produced by different data centers display uneven spatial attributes with varying associated uncertainties. Via spatial diagnostics tools and a modified triple collocation (MTC) approach, this research evaluates the TWS (terrestrial water storage) trend estimations “on the grid-scale” from 11 gridded GRACE products of RL05 and RL06 releases between 2002 and 2017. Distinct from classic TCA (triple collocation analysis), the MTC employs a GWR (geographically weighted regression) scaling scheme with distinctive spatial coefficients. The spatial diagnostics analyses identified different autocorrelation patterns, clustering tendencies of hot (positive) and cold (negative) spots agglomeration at varying spatial width, and unique frequency distributions. The results indicated that within a 10-degree spatial radius the SHs (Spherical Harmonics) of RL05 and RL06 are highly autocorrelated compared to the mascons (mass concentration blocks) solutions. The spatial clustering results revealed that many solutions agreed on the overall directions and distribution of the hot and cold spots. The clustering among mascon products, however, reflected more localized mass anomalies. At the scale of drainage basins, the trend magnitude, as well as their associated uncertainties appeared to be driven by the occurrence of spatial clusters within the basin area. The MTC results showed that the uncertainty patterns follow the same spatial extent within each cluster. The MTC analysis underscored the added benefits of cluster analysis and the GWR scaling over the classic OLS approach.read more
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Journal ArticleDOI
Quantifying Water Consumption through the Satellite Estimation of Land Use/Land Cover and Groundwater Storage Changes in a Hyper-Arid Region of Egypt
TL;DR: In this article , the authors used optical remote sensing (ORS) and GRACE satellite data to quantify the water consumption in a hyper-arid region (New Valley, Egypt) using two different approaches, and compared and contrast the quantitative results of the two approaches.
Journal ArticleDOI
Spatiotemporal Analysis of Future Trends in Terrestrial Water Storage Anomalies at Different Climatic Zones of India Using GRACE/GRACE-FO
Mohd Sayeed Ul Hasan,Mufti Mohammad Saif,Nehal S. Ahmad,Abhishek Rai,Mohammad Amir Khan,Ali Aldrees,W. A. Khan,Mustafa Adil Mohammed,Zaher Mundher Yaseen +8 more
TL;DR: In this paper , a climatological evaluation of terrestrial water storage anomalies (TWSAs), which act as driving forces for sustainable development, in one of the most populous countries of the world, is presented.
Journal ArticleDOI
Jointly estimating recharge and groundwater withdrawals of the NWSAS by inverting GRACE/GRACE-FO gravity data
TL;DR: In this paper , a new approach is proposed for estimating groundwater recharge and withdrawals in the North Western Sahara Aquifer System (NWSAS) by inverting 18 years of Gravity Recovery and Climate Experiment (GRACE/GRACE-Follow-On) data.
References
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Journal ArticleDOI
A modified Mann-Kendall trend test for autocorrelated data
TL;DR: In this paper, the effect of autocorrelation on the variance of the Mann-Kendall trend test statistic is discussed, and a modified non-parametric trend test is proposed.
Journal ArticleDOI
Accuracy of scaled GRACE terrestrial water storage estimates
Felix W. Landerer,Sean Swenson +1 more
TL;DR: In this paper, the accuracy of global-gridded terrestrial water storage (TWS) estimates derived from temporal gravity field variations observed by the Gravity Recovery and Climate Experiment (GRACE) satellites is assessed.
Journal ArticleDOI
Emerging trends in global freshwater availability.
Matthew Rodell,James S. Famiglietti,James S. Famiglietti,David N. Wiese,John T. Reager,Hiroko Kato Beaudoing,Hiroko Kato Beaudoing,Felix W. Landerer,Min-Hui Lo +8 more
TL;DR: Analysis of 2002–2016 GRACE satellite observations of terrestrial water storage reveals substantial changes in freshwater resources globally, which are driven by natural and anthropogenic climate variability and human activities.
Journal ArticleDOI
Improved methods for observing Earth's time variable mass distribution with GRACE using spherical cap mascons
TL;DR: The mascon basis functions allow for convenient application of a priori information derived from near-global geophysical models to prevent striping in the solutions, and do not necessitate empirical filters to remove north-south stripes, lowering the dependence on using scale factors as discussed by the authors.
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