Over the last 2 weeks, Pine Island Glacier, a major ice mass in Antartic, has been revelling an increasing crack which has been followed by NASA scientists.
A large iceberg, with approximately 35Km by 20km, roughly the size of Singapore, is forming and detaching from the main Pine Glacier heading to the Amundsen Sea, freely drifting away from the coast into the Antartic Ocean.
NASA published images, comparing the glacier last October 28th and November 13th, where changes on the ice crack are visible with an increasing open-water between the glacier and the detaching ice mass.
Named B-31, the iceberg will be followed by a team scientists from Sheffield and Southampton universities which will track the 700 square-kilometer chunk of ice and try to predict its path using satellite data.
The shelf of Pine Island Glacier has been moving forward at roughly 4 kilometers per year, so the calving of this iceberg is not necessarily a surprise, noted Tom Wagner, NASA’s cryosphere program manager.
Such events happen about every five or six years, though Iceberg B-31 is about 50 percent larger than previous ones in this area. Scientists have been studying Pine Island Glacier closely because there is evidence that warmer seawater below the shelf will cause the ice grounding line to retreat and the glacier to thin and speed up.
Such events happen about every five or six years, though Iceberg B-31 is about 50 percent larger than previous ones in this area. Scientists have been studying Pine Island Glacier closely because there is evidence that warmer seawater below the shelf will cause the ice grounding line to retreat and the glacier to thin and speed up.
 |
| November 13th 2013 |
Sem comentários:
Enviar um comentário