Mass Variations in Terrestrial Water Storage over the Nile River Basin and Mega Aquifer System as Deduced from GRACE-FO Level-2 Products and Precipitation Patterns from GPCP Data

Changes in the terrestrial total water storage (TWS) have been estimated at both global and river basin scales from Gravity Recovery Climate Experiment (GRACE) mission are still being detected its GRACE Follow-On (GRACE-FO) mission. In this contribution, sixth release of GRACE-FO (RL06) level-2 products applying DDK5 (decorrelation filter) were used to detect mass variations for Nile River Basin (NRB) Africa Mega Aquifer System (MAS) Asia. The following approach was implemented variation over NRB MAS: (1) TWS (June 2018–June 2021) by converting spherical harmonic coefficients decorrelation filter DDK 5 Level-2 RL06 into equivalent heights, where had re-produced after removing mean temporal signal (2) Precipitation data Global Climatology Project investigate pattern change study area. Our findings include: during period, extracted RL06-DDK5 solutions three official centers—CSR, JPL, GFZ—were found be consistent with each other, showed substantial variations, given a average about 6 cm 2019 12 2020 between September November lower ?9 ?6 wet seasons March May, while MAS relatively weaker magnitude, (3) observed seasonal attributed high intensity precipitation events (AAP: 1000–1800 mm yr?1), whereas lack due low 180–500 yr?1).