Light reaches deep in southeast Pacific | Science News

ADVERTISEMENT

MISSION CRITICAL

Support credible science journalism.

Subscribe to Science News today.


News

Light reaches deep in southeast Pacific

By
1:53pm, July 30, 2007

An oceanographic survey of the southeastern Pacific has discovered a region where ultraviolet radiation penetrates deeper than has been measured in any other ocean locale.

Sunlight streaming onto the ocean's surface is either absorbed by water molecules or dissolved substances, or else scattered sideways when it reflects off objects such as microorganisms. In ocean regions teeming with life, 90 percent of the light at certain ultraviolet wavelengths is blocked before it reaches a depth of 3 meters, says Richard Sempéré, a marine biogeochemist at the University of the Mediterranean in Marseilles, France.

This article is available only to subscribing members. Join the Society today or Log in.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content