Feeds

NASA: Clean-air regs, not CO2, are melting the ice cap

Acid-rain countermeasures could drown London

Secure remote control for conventional and virtual desktops

Dirty Chinese coal to save us all?

Other scientists have recently suggested that it's not just the Arctic which is subject to aerosol effects. Boffins from the US National Oceanic and Atmospheric Administration have said that aerosol levels from dust storms and volcanoes alone would account for as much as 70 per cent of the temperature rise seen in the Atlantic ocean during the past 26 years, leaving carbon simply nowhere.

Shindell's new NASA study is particularly topical, as President Obama's new science advisor has just suggested that the subject of "geoengineering" - artificially modifying the climate - must be considered as a countermeasure to global warming. One measure put forward by geoengineering advocates is the deliberate injection of sulphur particulates into the atmosphere.

There might not even be any need for action on the part of the West, with China building sulphur-belching coal power stations and diesel vehicles at a furious rate in recent times. Dr Shindell doesn't say so, but it's at least possible that this has something to do with the fact that global temperatures have actually dipped slightly over the last couple of years.

Meanwhile Dr Shindell's position at NASA's Goddard Institute in New York must now be a potentially stressful one. His boss, Dr James Hansen, is more or less the father of the carbon-driven global warming menace. He won't be pleased at the suggestion that carbon emissions may not be such an overriding concern after all. Dr Hansen has even gone so far as to travel to the UK, to add his weight to protests against the Kingsnorth coal plant.

There are of course many arguments against a deliberate policy of sulphate emissions. They cause acid rain, for one thing: the original anti-sulphur regs weren't introduced just for fun. But the appearance of aerosols at the front of the climate-science stage does indicate that the issue isn't simple, and that environmental policies can have unforeseen and unexpected effects.

The goal of simply cutting CO2 emissions by any means possible might have to be reconsidered somewhat: Shindell's research, backed by other recent studies, suggests that it might be a lot more cost-effective to tackle emissions of black-carbon aerosols. Filtering soot from exhausts would be hugely easier than capturing and sequestering CO2, building a fully wind/electric Blighty or other ambitious eco-schemes.

"There's still a lot more that we need to sort out," says Shindell, in understated style.

There's more for laymen from NASA here, or subscribers to Nature Geoscience can read the relevant journal article here, and expert commentary here. ®

Next gen security for virtualised datacentres

More from The Register

next story
Boffins attempt to prove the UNIVERSE IS JUST A HOLOGRAM
Is this the real life? Is this just fantasy?
Our LOHAN spaceplane ballocket Kickstarter climbs through £8000
Through 25 per cent but more is needed: Get your UNIQUE rewards!
NASA to reformat Opportunity rover's memory from 125 million miles away
Interplanetary admins will back up data and get to work
LOHAN tunes into ultra long range radio
And verily, Vultures shall speak status unto distant receivers
SpaceX prototype rocket EXPLODES over Texas. 'Tricky' biz, says Elon Musk
No injuries or near injuries. Flight stayed in designated area
Galileo, Galileo! Galileo, Galileo! Galileo fit to go. Magnifico
I'm just a poor boy, nobody loves me. But at least I can find my way with ESA GPS by 2017
EOS, Lockheed to track space junk from Oz
WA facility gets laser-eyes out of the fog
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
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?