[1] In this study we estimate a time series of regional groundwater anomalies by combining terrestrial water storage estimates from the Gravity Recovery and Climate Experiment (GRACE) satellite mission with in situ soil moisture observations from the Oklahoma Mesonet. Using supplementary data from the Department of Energy’s Atmospheric Radiation Measurement (DOE ARM) network, we develop an empi...

Mass changes of the Greenland Ice Sheet resolved by drainage system regions were derived from a local mass concentration analysis of NASA-Deutsches Zentrum für Luftund Raumfahrt Gravity Recovery and Climate Experiment (GRACE mission) observations. From 2003 to 2005, the ice sheet lost 101 +/- 16 gigaton/year, with a gain of 54 gigaton/year above 2000 meters and a loss of 155 gigaton/year at low...

Terrestrial water storage anomaly (TWSA) retrieved from the Gravity Recovery and Climate Experiment (GRACE) mission can be used as a good indicator of flood potential, but it is limited to regional analysis due coarse resolution (?300 km). This study proposed an optimal least square merging scheme spatially downscale GRACE-based TWSA via integrating with model-based estimates on finer (0.125°) ...

The Gravity Recovery and Climate Experiment (GRACE) GRACE Follow-On (GRACE-FO) provided twenty years of data on Earth’s time-varying gravity field. Due to their design, GRACE-FO are inherently limited in spatiotemporal coverage, limiting resolution a few hundred kilometers temporally roughly monthly solutions. To increase the global allow for determination submonthly field signals, constellatio...

The Gravity Recovery and Climate Experiment (GRACE) satellite provides time-varying gravity field models that can detect total water storage change (TWSC) from April 2002 to June 2017, its second-generation satellite, GRACE Follow-On (GRACE-FO), 2018, so there is a one year gap. Swarm satellites are equipped with Global Positioning System (GPS) receivers, which be used recover the Earth’s gravi...

A comparison between daily in-situ water level time series measured at ground-based hydrometric stations (HS – 1,899 stations located in twelve Brazilian basins) of the Agência Nacional de Águas (ANA) with vertically-integrated water height anomaly deduced from the Gravity Recovery and Climate Experiment (GRACE) geoid is carried out in Brazil. The equivalent water height (EWH) of 10-day interva...

The Gravity Recovery and Climate Experiment (GRACE) primary mission will be performed by making measurements of the inter-satellite range change between two co-planar, low altitude, near-polar orbiting satellites. Understanding the uncertainties in the disturbance environment, particularly the aerodynamic drag and torques, is critical in several mission areas. These include an accurate estimate...

S U M M A R Y In this study, we develop a methodology to estimate monthly variations in degree-1 and C20 coefficients by combing Gravity Recovery and Climate Experiment (GRACE) data with oceanicmass anomalies (combination approach).With respect to themethod by Swenson et al., the proposed approach exploits noise covariance information of both input data sets and thus produces stochastically opt...