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Rateb, Ashraf, Kuo, Chung-Yen, Imani, Moslem, Tseng, Kuo-Hsin, Lan, Wen-Hau, Ching, Kuo-En, and Tseng, Tzu-Pang, 2017. Terrestrial Water Storage in African Hydrological Regimes Derived from GRACE Mission Data: Intercomparison of Spherical Harmonics, Mass Concentration, and Scalar Slepian Methods. Sensors, 17(3):566, doi:10.3390/s17030566.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2017Senso..17..566R,
author = {{Rateb}, Ashraf and {Kuo}, Chung-Yen and {Imani}, Moslem and {Tseng}, Kuo-Hsin and {Lan}, Wen-Hau and {Ching}, Kuo-En and {Tseng}, Tzu-Pang},
title = "{Terrestrial Water Storage in African Hydrological Regimes Derived from GRACE Mission Data: Intercomparison of Spherical Harmonics, Mass Concentration, and Scalar Slepian Methods}",
journal = {Sensors},
keywords = {terrestrial water storage, GRACE, spherical harmonics, global mascon, Slepian basis, Africa basins},
year = 2017,
month = mar,
volume = {17},
number = {3},
eid = {566},
pages = {566},
abstract = "{Spherical harmonics (SH) and mascon solutions are the two most common
types of solutions for Gravity Recovery and Climate Experiment
(GRACE) mass flux observations. However, SH signals are degraded
by measurement and leakage errors. Mascon solutions (the Jet
Propulsion Laboratory (JPL) release, herein) exhibit weakened
signals at submascon resolutions. Both solutions require a scale
factor examined by the CLM4.0 model to obtain the actual water
storage signal. The Slepian localization method can avoid the SH
leakage errors when applied to the basin scale. In this study,
we estimate SH errors and scale factors for African hydrological
regimes. Then, terrestrial water storage (TWS) in Africa is
determined based on Slepian localization and compared with JPL-
mascon and SH solutions. The three TWS estimates show good
agreement for the TWS of large-sized and humid regimes but
present discrepancies for the TWS of medium and small-sized
regimes. Slepian localization is an effective method for
deriving the TWS of arid zones. The TWS behavior in African
regimes and its spatiotemporal variations are then examined. The
negative TWS trends in the lower Nile and Sahara at -1.08 and
-6.92 Gt/year, respectively, are higher than those previously
reported.}",
doi = {10.3390/s17030566},
adsurl = {https://ui.adsabs.harvard.edu/abs/2017Senso..17..566R},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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