Satellite praised for coral bleaching info

Oct 04, 2005

Australian researchers in Canberra have found Envisat's medium resolution imaging spectrometer can detect coral bleaching to about 33 feet deep.

That means the European Space Agency's Envisat, the largest Earth observation satellite, could potentially monitor affected coral reefs worldwide.

Coral bleaching occurs when algae living in living coral polyps are expelled. The whitening coral may die, producing negative affects on the reef ecosystem.

"An increase in frequency of coral bleaching may be one of the first tangible environmental effects of global warming," said Arnold Dekker of Australia's Commonwealth Scientific and Industrial Research Organization. "The concern is that coral reefs might pass a critical bleaching threshold beyond which they are unable to regenerate."

Copyright 2005 by United Press International

Explore further: The difference between CMEs and solar flares

add to favorites email to friend print save as pdf

Related Stories

Coral death imminent on Great Barrier Reef

Jul 04, 2014

(Phys.org) —The Great Barrier Reef is at greater risk than ever from severe weather events, and University of Queensland researchers predict an increase in coral death this summer.

Great Barrier Reef in danger, scientists say

Jul 03, 2014

Scientists at a coral reef symposium in Canberra this week are examining degraded reefs off the Northwest Australian coast in an effort to determine what lies ahead for the Great Barrier Reef.

Decade of benefits for the Great Barrier Reef

Jul 03, 2014

With this week marking the tenth anniversary of the rezoning of the Great Barrier Reef Marine Park, prominent marine scientists from around the world have gathered in Canberra to discuss its successes - both expected and ...

Study: Carib reefs need parrotfish, sea urchins (Update)

Jul 02, 2014

Colorful parrotfish and spindly sea urchins are the key to saving the Caribbean's coral reefs, which may disappear in two decades if no action is taken, a report by several international organizations said ...

Recommended for you

The difference between CMEs and solar flares

32 minutes ago

This is a question we are often asked: what is the difference between a coronal mass ejection (CME) and a solar flare? We discussed it in a recent astrophoto post, but today NASA put out a video with amazing graphics that explain ...

Scientific instruments of Rosetta's Philae lander

42 minutes ago

When traveling to far off lands, one packs carefully. What you carry must be comprehensive but not so much that it is a burden. And once you arrive, you must be prepared to do something extraordinary to make ...

Image: NGC 6872 in the constellation of Pavo

1 hour ago

This picture, taken by the NASA/ESA Hubble Space Telescope's Wide Field Planetary Camera 2 (WFPC2), shows a galaxy known as NGC 6872 in the constellation of Pavo (The Peacock). Its unusual shape is caused ...

Measuring the proper motion of a galaxy

2 hours ago

The motion of a star relative to us can be determined by measuring two quantities, radial motion and proper motion. Radial motion is the motion of a star along our line of sight. That is, motion directly ...

How ancient impacts made mining practical

2 hours ago

About 1.85 billion years ago, in what would come to be known as Sudbury Canada, a 10 kilometer wide asteroid struck with such energy that it created an impact crater 250 kilometers wide. Today the chief industry of Sudbury ...

User comments : 0