While modern satellite - based techniques such as laser altimetery and
gravity anomaly measurements provide important information on very recent changes, to get at the longer term we must rely on less direct methods.
The
Gravity Recovery and Climate Experiment (GRACE) satellite, a joint project between NASA and the German Aerospace Centre, provided measurements of gravity anomalies, which the team related to groundwater
Gravity Recovery and Climate Experiment (GRACE) satellite, a joint project between NASA and the German Aerospace Centre, provided
measurements of
gravity anomalies, which the team related to groundwater
gravity anomalies, which the team related to groundwater height.