Feeds

Oxygen pollution began earlier than we ever thought

Climate change for the anaerobes

Secure remote control for conventional and virtual desktops

Earth's atmosphere had oxygen in it 50-100m years earlier than anyone ever thought, according to new research from NASA.

The scientists were studying kilometre long core samples from Western Australia, in a bid to understand conditions on our planet before the rise of oxygen in the atmosphere, known as the Great Oxidation Event.

The core sample contains a continuous record of the conditions on earth, almost as if someone had left a giant tape recorder running, keeping a tidy record of the state of the planet throughout the ages.

By analysing the abundance of various metals and sulphur isotopes, the team was able to confirm that the corrosive gas was floating around the atmosphere at times predating the GOE, something no one was expecting.

"We seem to have captured a piece of time during which the amount of oxygen was actually changing - caught in the act, as it were," said Ariel Anbar, an associate professor at Arizona State University, Tempe, and leader of one of the research teams.

Anbar and his team were tracking amounts of trace metals whose quantity in oceans and sediments is governed by the amount of oxygen in the atmosphere. The other research team, led by Alan Kaufman of the University of Maryland, analysed sulphur isotopes, also a function of the abundance of oxygen.

The notion that organisms started to produce oxygen a little earlier is not totally new. Some scientists support the idea that oxygen production began on a small scale, and that the quantities produced were quickly absorbed by volcanic gases and rocks.

"What we have now is new evidence for some oxygen in the environment 50 to 100 million years before the big rise of oxygen," Anbar said. "Our findings strengthen the notion that organisms learned to produce oxygen long before the Great Oxidation Event, and that the rise of oxygen in the atmosphere ultimately was controlled by geological processes." ®

Secure remote control for conventional and virtual desktops

More from The Register

next story
SCREW YOU, Russia! NASA lobs $6.8bn at Boeing AND SpaceX to run space station taxis
Musk charging nearly half as much as Boeing for crew trips
Boffins say they've got Lithium batteries the wrong way around
Surprises at the nano-scale mean our ideas about how they charge could be all wrong
Thought that last dinosaur was BIG? This one's bloody ENORMOUS
Weighed several adult elephants, contend boffins
Europe prepares to INVADE comet: Rosetta landing site chosen
No word yet on whether backup site is labelled 'K'
India's MOM Mars mission makes final course correction
Mangalyaan probe will feel the burn of orbital insertion on September 24th
Cracked it - Vulture 2 power podule fires servos for 4 HOURS
Pixhawk avionics juice issue sorted, onwards to Spaceport America
City hidden beneath England's Stonehenge had HUMAN ABATTOIR. And a pub
Boozed-up ancients drank beer before tearing corpses apart
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
Security and trust: The backbone of doing business over the internet
Explores the current state of website security and the contributions Symantec is making to help organizations protect critical data and build trust with customers.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.