G
Geodesy

hydrology

High resolution terrestrial water storage changes from combination of GRACE and models

, and February 7, 2024
High resolution terrestrial water storage changes from combination of GRACE and models
Image credits: Jakob Keck (distributed via imaggeo.egu.eu)

The Gravity Recovery and Climate Experiment (GRACE) satellite mission (2002-2017) consisted of two satellites at ~500 km altitude separated by 200 km, following each other in the same orbit. The distance between the two GRACE satellites changes because of the gravitational pull of the masses beneath the satellites. As such, mass changes at or near the Earth’s surface caused variations in the dista ...[Read More]

A look beneath Earth’s surface: monitoring groundwater from space

August 26, 2021
A look beneath Earth’s surface: monitoring groundwater from space
Credit: Antonio Jordán (distributed via imaggeo.egu.eu)

Groundwater is one of the most important resources of freshwater for ecosystems and mankind. Because of this fundamental role in the Earth’s water and energy cycles, groundwater has been declared as an essential climate variable by GCOS, the Global Climate Observing System. As with other subsurface processes, it is difficult to observe and monitor on a global scale. This is especially true if you ...[Read More]