How the big melt-off starts

When an ice age ends, which comes first: a rise in world temperature or an increase in greenhouse gases? After analyzing the carbon-dioxide content in tiny air bubbles trapped in Antarctic ice, then comparing the results with ancient temperature records, researchers from Scripps Institute of Oceanography in San Diego say the answer is temperature warming.

Warming, they report in Science magazine, is started by changes in Earth's position relative to the sun. This causes organisms to flourish and produce carbon dioxide through respiration and decay.

About these ads
Sponsored Content by LockerDome

We want to hear, did we miss an angle we should have covered? Should we come back to this topic? Or just give us a rating for this story. We want to hear from you.

Loading...

Loading...

Loading...

Save for later

Save
Cancel

Saved ( of items)

This item has been saved to read later from any device.
Access saved items through your user name at the top of the page.

View Saved Items

OK

Failed to save

You reached the limit of 20 saved items.
Please visit following link to manage you saved items.

View Saved Items

OK

Failed to save

You have already saved this item.

View Saved Items

OK