COSEE Ocean Systems: News
Matter in Motion: Earth's Changing Gravity
Description: Traditionally, scientists constructed gravity maps using a combination of land measurements, ship records, and more recently, remote sensing. However, those measurements weren't accurate enough to capture the slight changes in water movement that cause gravity to vary over time. To better assess these gravity variations, an international team of engineers and scientists developed the Gravity Recovery and Climate Experiment (GRACE) mission that launched in March 2002. With GRACE data, scientists can now weigh water as it circulates around the globe and relate these measurements to changes in sea level, soil moisture, and ice sheets. [Source: NASA Earth System Science Data and Services]
URL: http://nasadaacs.eos.nasa.gov/articles/2005/2005_gravity.html
Availability: Full Text
Source: NASA Earth System Science Data and Services
Publish Date: 11/8/2007
Reading Level: Basic
Page Length: 2

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