Antarctic Gravitational 'Holes' Are Growing
Deep beneath the Antarctic ice, hundreds of kilometers inside the planet, lies a process that could change our understanding of Earth's climate history. Scientists have been studying so-called 'gravitational holes' for decades, areas where gravity is weaker than expected. One of the most pronounced is located right under the South Continent.
TL;DR
- A gravitational anomaly, known as a 'gravity hole,' is strengthening beneath Antarctica.
- This anomaly is caused by slow-moving masses of hotter, less dense rock deep within the Earth's mantle.
- The strengthening of this anomaly over millions of years correlates with significant climate shifts, such as the expansion of the Antarctic ice sheet.
- Models suggest this gravitational weakening may have contributed to the long-term stability of ice on the continent.
- While not explaining current climate change, the findings imply the Earth's climate system might encompass its deep mantle.