Earth's Gravitational Field (Geoid) Visualization from GRACE Data
Summary: A rotating visualization of Earth's gravitational field (geoid) showing areas of higher (red/yellow) and lower (blue/green) gravity.
This video displays a detailed, false-color representation of Earth's geoid, which is essentially the shape the ocean's surface would take under the influence of gravity alone, without ocean currents and tides. Based on data from the GRACE (Gravity Recovery and Climate Experiment) mission, the visualization highlights anomalies in the gravitational field. Red and yellow regions indicate areas where gravity is stronger than average, often corresponding to large mountain ranges or dense underground structures. Conversely, blue and green areas represent regions with weaker gravity, typically found over oceanic trenches or areas with less dense crust. The Earth model slowly rotates, showcasing the global distribution of these gravitational variations and providing insights into the planet's internal mass distribution.
Playback guide
1. timestamp: 00:00 label: Initial view of the Americas, showing high gravity along the Andes mountains. 2. timestamp: 00:02 label: Rotation continues, shifting view towards the Pacific Ocean and parts of North America. 3. timestamp: 00:04 label: Australia and Southeast Asia become prominent, highlighting gravitational features in this region. 4. timestamp: 00:06 label: The view progresses to India, parts of Asia, and the Middle East, with strong gravity signals around the Himalayas. 5. timestamp: 00:09 label: Africa and Europe are visible, showing various gravitational anomalies across the continents and surrounding oceans. 6. timestamp: 00:12 label: The Atlantic Ocean is central, as the Earth model rotates back towards the Americas. 7. timestamp: 00:15 label: Return to the Americas, completing approximately one full rotation cycle. 8. timestamp: 00:16 label: The rotation cycle begins again, reiterating the global gravitational field.