Feeds

Antarctic ice formed at CO2 levels much higher than today's

Not going to melt any time soon, says boffin

Intelligent flash storage arrays

New research has shown that the mighty ice sheet covering the Antarctic froze into being when the world had a much higher level of carbon dioxide in its atmosphere than it does today.

By analysing ancient algae found in deep-sea core samples, Professor Matthew Huber and his colleagues determined that the mile-thick ice which now covers the south polar continent formed around 34 million years ago. At that stage the atmosphere held much more CO2 than it does now, some 600 parts per million (ppm) as opposed to today's level of 390 ppm.

There is often concern that the Antarctic ice sheet might melt due to global warming (though in fact, despite much publicity over losses of ice from the Western peninsula, Antarctic ice has been steadily increasing in extent for the last 40 years). It would seem that this is highly unlikely given current and near-future levels of atmospheric CO2: at current rates of increase it will take a century at least to reach 600 ppm, the level at which the ice sheet formed itself, and higher levels would be needed to actually start it melting.

Even once the process begins there won't be any need for our great-grandchildren to panic, according to Huber.

"If we continue on our current path of warming we will eventually reach that tipping point," he says. "Of course after we cross that threshold it will still take many thousands of years to melt an ice sheet."

The new research is published in premier boffinry mag Science, here. ®

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.