Chasing Water: How NASA Monitors the Earth's Changing Water Cycle
Wednesday, April 25th, 2018 at 2 p.m. EST.
Join EarthEcho and Dr. David Wiese for a live virtual field trip. Did you know that NASA is constantly tracking how water moves around the Earth? We monitor droughts and floods, the melting of glaciers and ice sheets, and the rise of the oceans. This has all been made possible by two twin satellites called the Gravity Recovery and Climate Experiment (GRACE), which track tiny variations in the Earth’s gravity field over time. In this talk I will tell a story of how GRACE works, and some of its most important scientific discoveries. How fast is the ocean gaining water? What is happening to the ice sheets and glaciers around the world? What is happening to the world’s supply of groundwater? I will also discuss the future launch of the GRACE Follow-On satellites, planned for April 2018, which will continue the measurements that GRACE started making in 2002. For more information, see here.