Feeds

Huge iceberg menaces Antarctica

Collision with ice tongue imminent

  • alert
  • submit to reddit

Intelligent flash storage arrays

The monster iceberg responsible for breaking off a sizeable chunk of the Drygalski ice tongue in Antarctica is on the rampage again. This time, the Long-Island-sized chunk of ice is heading towards the ice tongue of the Aviator Glacier, where the latest images (snapped on 18 May) reveal it is heading rapidly for a collision.

The marauding iceberg heads towards the Aviator Glacier

The picture was snapped on 18 May with the Envisat satellite's Advanced Synthetic Aperture Radar (ASAR). The ASAR in Wide Swath Mode (WSM) captures a spatial resolution of 150 metres across a 400-km swath.

The Aviator Glacier was discovered in 1955, and was named for the airmen who did so much to open the continent up to explorers and scientists. The Aviator is a major valley glacier which descends from the plateau of Victoria Land along the west side of the Mountaineer Range. It meets the ocean at Lady Newnes Bay, where it forms a floating ice tongue that extends into the water for about 25 kilometres.

The iceberg, designated B15-A, is the largest remaining piece of an even bigger berg that calved from the Ross ice shelf in 2000. The original iceberg, dubbed B15, was roughly the size of the island of Jamaica. Since the B15-A broke away from its mother-berg, it has drifted into McMurdo sound. Here, it has been nothing but trouble to the locals.

Its huge presence blocked ocean currents, leading to a build up of sea ice that decimated local penguin colonies as the birds could not access the open ocean to feed.

During the last Antarctic spring, the glacier drifted slowly towards the Drygalski ice tongue, and looked set to strike a devastating blow to the glacial run-off. Eventually the berg struck the glacier with only a glancing blow, nevertheless breaking off enough of the ice tongue that maps of the region needed redrawing.

Now it is menacing another stretch of coast, one unusually rich in wildlife. Researchers fear that if the berg stays put for any length of time, it could again lead to a dangerous build-up of sea ice, blocking access to the sea for the local Adelie penguins, Skuas and Weddell seals.

If you have the bandwidth, you can check out high-res versions of the picture above, and animations of the Drygalski collision here. ®

Related stories

Giant iceberg slams into glacial tongue
Life on earth follows 62 million year cycle
Satellite snaps huge, penguin-killing iceberg

Intelligent flash storage arrays

More from The Register

next story
MARS NEEDS WOMEN, claims NASA pseudo 'naut: They eat less
'Some might find this idea offensive' boffin admits
LOHAN crash lands on CNN
Overflies Die Welt en route to lively US news vid
Comet Siding Spring revealed as flying molehill
Hiding from this space pimple isn't going to do humanity's reputation any good
Experts brand LOHAN's squeaky-clean box
Phytosanitary treatment renders Vulture 2 crate fit for export
Boffins who stare at goats: I do believe they’re SHRINKING
Alpine chamois being squashed by global warming
No sail: NASA spikes Sunjammer
'Solar sail' demonstrator project binned
Carry On Cosmonaut: Willful Child is a poor taste Star Trek parody
Cringeworthy, crude and crass jokes abound in Steven Erikson’s sci-fi debut
prev story

Whitepapers

Cloud and hybrid-cloud data protection for VMware
Learn how quick and easy it is to configure backups and perform restores for VMware environments.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Three 1TB solid state scorchers up for grabs
Big SSDs can be expensive but think big and think free because you could be the lucky winner of one of three 1TB Samsung SSD 840 EVO drives that we’re giving away worth over £300 apiece.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.