Gravity Recovery and Climate Experiment (GRACE)
Written by Carol Rasmussen
NASA Earth Science News Team
- In 15 years of operations, the GRACE satellite mission has revolutionized our view of how water moves and is stored on Earth.
- GRACE measures changes in the local pull of gravity as water shifts around Earth due to changing seasons, weather and climate processes.
- Among other innovations, GRACE gave us the first space-based view of water beneath Earth’s surface, giving insight into where aquifers may be shrinking or dry soils contributing to drought.
- The GRACE Follow-On mission, launching in early 2018, will extend GRACE’s innovative measurements
“Revolutionary” is a word you hear often when people talk about the GRACE mission. Since the twin satellites of the U.S./German Gravity Recovery and Climate Experiment launched on March 17, 2002, their data have transformed scientists’ view of how water moves and is stored around the planet.
“With GRACE, we effectively created a new field of spaceborne remote sensing: tracking the movement of water via its mass,” said Michael Watkins, the original GRACE project scientist and now director of NASA’s Jet Propulsion Laboratory, Pasadena, California.