Southampton researcher helps to track Manhattan-sized iceberg to prevent shipping disruption

Nov 14, 2013
Southampton researcher helps to track Manhattan-sized iceberg to prevent shipping disruption
On the left handside the newly formed iceberg is visible. Credit: DLR

A University of Southampton researcher is helping to track an iceberg the size of Manhattan, which has recently broken off the Pine Island Glacier in Antarctica and could threaten shipping lanes in the Southern Ocean.

The Natural Environment Research Council (NERC) has just agreed to fund an urgency grant that will let researchers track and predict the iceberg's path, preventing it from becoming a maritime hazard.

"The primary reason to monitor the iceberg is that it's very large. An iceberg that size could survive for a year or longer and it could drift a long way north in that time and end up in the vicinity of world shipping lanes in the Southern Ocean," explains Dr Robert Marsh from Ocean and Earth Science at the University of Southampton, an investigator on the project.

"There's a lot of activity to and from the Antarctic Peninsula, and ships could potentially cross paths with this large iceberg, although it would be an unusual coincidence, adds Dr Marsh, who is based at the National Oceanography Centre, Southampton."

Scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research discovered the crack in the glacier and have been following this natural spectacle via the earth observation satellites TerraSAR-X from the German Space Agency (DLR). They have been documenting the calving incident in many individual images that are currently providing data on how the iceberg is travelling.

Globally, icebergs of this size break off of glaciers on average every two years, but until now there has been no attempt to track and predict their path.

The team will use their results to more accurately model the paths of future large icebergs, which are likely to become more common as global warming encourages glacier calving - where ice breaks off of the end of a glacier.

The large amounts of freshwater released by the iceberg as it melts could also affect the ocean currents.

"If the stays around the Antarctic coast, it will melt slowly and will eventually add a lot of freshwater that stays in that coastal current, altering the density and affecting the speed of the current. Similarly, if it moves north it will melt faster but it could alter the overturning rates of the current as it may create a cap of freshwater above the denser seawater," says Professor Grant Bigg of the University of Sheffield, principal investigator on the grant.

"This glacier is not large enough to have a big impact, but it could have an effect. Particularly if these events become more common, there will be a build-up of freshwater which could have lasting effects," he concludes.

Explore further: Bridgmanite: World's most abundant mineral finally named

add to favorites email to friend print save as pdf

Related Stories

More ice breaks off of Petermann Glacier

Jul 19, 2012

(Phys.org) -- The Petermann Glacier grinds and slides toward the sea along the northwestern coast of Greenland, terminating in a giant floating ice tongue. Like other glaciers that end in the ocean, Petermann ...

Ice scientists study the birth of anĀ iceberg

Oct 30, 2012

The moment of birth of an iceberg has been analysed in detail for the first time. A team of scientists from the University of St Andrews and Aberystwyth University has completed a detailed and thorough survey ...

Recommended for you

Bridgmanite: World's most abundant mineral finally named

16 hours ago

A team of geologists in the U.S. has finally found an analyzable sample of the most abundant mineral in the world allowing them to give it a name: bridgmanite. In their paper published in the journal Science, the te ...

Volcano in south Japan erupts, disrupting flights

23 hours ago

A volcano in southern Japan is blasting out chunks of magma in the first such eruption in 22 years, causing flight cancellations and prompting warnings to stay away from its crater.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.