Journal
WATER RESOURCES RESEARCH
Volume 42, Issue 12, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2006WR005192
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[1] The temporal signature of terrestrial storage changes inferred from the Gravity Recovery and Climate Experiment ( GRACE) has been assessed by comparison with outputs from a calibrated hydrological model ( lumped elementary watershed (LEW)) of the upper Zambezi and surroundings and an inspection of the within-month ground track coverage of GRACE together with spatial-temporal rainfall patterns. The comparison of the hydrological model with GRACE reveals temporal inconsistencies between both data sets. Because the LEW model has been calibrated and validated with independent data sources, we believe that this is a GRACE artifact. The within-month ground track coverage shows an irregular orbit behavior which may well cause aliasing in the GRACE monthly deconvolutions. This aliasing is the most probable cause of observed temporal inconsistencies between GRACE and other data sets.
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