Gravity Variations

Interferometric Range Transceiver for Measuring Temporal Gravity Variations

We report on interferometric range transceiver technology demonstration. The goal of this work is to reduce risk for a follow-on gravity mission to the Gravity Recovery and Climate Experiment (GRACE) by demonstrating performance of a heterodyne interferometric laser ranging instrument appropriate for a follow-on gravity mission to GRACE at the NASA Technology Readiness Level (TRL) 6. In order t...

Do climate variations explain bilateral migration? A gravity model analysis

© A m Abstract: This paper investigates to what extent international migration can be explained by climatic variations. A gravity model of migration augmented with average temperature and precipitation in the country of origin is estimated using a panel data set of 142 sending countries for the period 1995 to 2006. We find two primary results. First, temperature is positively correlated with mi...

Dynamic topography, gravity and the role of lateral viscosity variations from inversion of global mantle flow

S U M M A R Y Lateral viscosity variations (LVVs) in the mantle influence geodynamic processes and their surface expressions. With the observed long-wavelength geoid, free-air anomaly, gravity gradient in three directions and discrete, high-accuracy residual topography, we invert for depthand temperature-dependent and tectonically regionalized mantle viscosity with a mantle flow model. The inve...

Temperature variations with respect to the specific gravity of glass fragments.

Estimated accuracies of regional water storage variations inferred from the Gravity Recovery and Climate Experiment (GRACE)

[1] The satellite Gravity Recovery and Climate Experiment (GRACE) provides data describing monthly changes in the geoid, which are closely related to changes in vertically integrated terrestrial water storage. Unlike conventional point or gridded hydrologic measurements, such as those from rain gauges, stream gauges, rain radars, and radiometric satellite images, GRACE data are sets of Stokes c...