G
Geodesy

total water storage

Combining GRACE and Kalman filter to get superior evapotranspiration estimates

, and October 25, 2024
Combining GRACE and Kalman filter to get superior evapotranspiration estimates
(source: Getty/Oleh_Slobodeniuk)

Knowledge gaps in our understanding of the Hydrological Cycle  The water cycle continuously provides us with fresh water.  A critical process in the water cycle is evapotranspiration (ET), meaning that water evaporates from the surface and transpires from plants into the atmosphere. ET plays a crucial role in climate stability and the regulation of global water resources, but it is one of the most ...[Read More]

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]