A major new study has produced the most comprehensive inventory yet of volcanoes concealed beneath Antarctica's ice sheet, providing researchers with an important new tool for understanding how geological processes may influence the future behaviour of the Antarctic Ice Sheet. The research, published in Earth-Science Reviews, presents the ANT-SGV-25 catalogue, a standardized reference inventory of 207 known or suspected Antarctic subglacial volcanoes.
The project was led by scientists from the Polar Research Institute of China (PRIC), Zhejiang University, Fudan University, and the University of Exeter. Rather than searching for new volcanoes, the team consolidated existing scientific observations into a continent-wide database with consistent measurements of location, size, shape and slope.
Subglacial volcanoes have attracted growing scientific interest because they can affect conditions at the base of the ice sheet. Heat from volcanic systems may contribute to localized melting, influence the movement of subglacial water and alter the flow of ice above. These interactions are important for researchers seeking to improve models of Antarctic ice-sheet behaviour and future sea-level change.
The catalog reveals a striking geographic pattern. Most identified volcanic features are concentrated within the West Antarctic Rift System, a region characterized by crustal stretching and elevated geothermal heat flow. In contrast, only a small number of candidates have been documented in East Antarctica.
Researchers also found substantial variation in volcanic morphology. The cataloged edifices range from relatively small features to large volcanic structures rising several kilometers above the surrounding landscape beneath the ice. Standardizing these measurements provides a foundation for future studies of volcanic origin, classification and potential impacts on ice dynamics.
For Antarctic scientists, ANT-SGV-25 represents more than a catalog. It offers a new reference framework for investigating one of the continent's least visible but potentially influential geological systems, helping to illuminate the complex relationship between Antarctica's ice and the hidden volcanic landscape beneath it.