Photo: Next Ice Age Delayed by Global Warming, Study Says



Humans are essentially putting the brakes on the next ice age, according to a September 2009 study that represents the most extensive work to date on Arctic climate change.

Arctic temperatures (seen in blue, above) have cooled over the past 2,000 years due to a natural tilt in Earth's axis. But human-caused global warming reversed that trend in the mid-1990s (seen in red).

Analysis of records from lake sediments, ice cores, and tree rings found the same results as computer models, strengthening the researchers' conclusions.

Image courtesy Science, modified by UCAR


NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS

ADVERTISEMENT

NATIONAL GEOGRAPHIC'S PHOTO OF THE DAY

50 Drives of a Lifetime

Listen to your favorite National Geographic news daily, anytime, anywhere from your mobile phone. No wires or syncing. Download Stitcher free today.