ScienceDaily: Top Environment News: New results from inside the ozone hole

 

ScienceDaily: Top Environment News


New results from inside the ozone hole

Posted: 11 Dec 2013 03:56 PM PST

Scientists have revealed the inner workings of the ozone hole that forms annually over Antarctica and found that declining chlorine in the stratosphere has not yet caused a recovery of the ozone hole.

Arctic cyclones more common than previously thought

Posted: 11 Dec 2013 10:42 AM PST

From 2000 to 2010, about 1,900 cyclones churned across the top of the world each year, leaving warm water and air in their wakes — and melting sea ice in the Arctic Ocean. That’s about 40 percent more than previously thought, according to a new analysis of these Arctic storms.

Fire vs. ice: The science of ISON at perihelion

Posted: 11 Dec 2013 10:29 AM PST

After a year of observations, scientists waited with bated breath on Nov. 28, 2013, as Comet ISON made its closest approach to the sun, known as perihelion. Would the comet disintegrate in the fierce heat and gravity of the sun? Or survive intact

Pine plantations provide optimum conditions for natural forests to develop underneath them

Posted: 11 Dec 2013 10:24 AM PST

If there is any native forest in the vicinity, tree, fern and herbaceous species typical of these forests penetrate under the pine plantations without any need for action. That way it is possible, to a certain extent, for native forests to be restored, thanks to the process known as ecological succession.

Alpine glacier, unchanged for thousands of years, now melting: New ice cores suggest Alps have been strongly warming since 1980s

Posted: 11 Dec 2013 10:24 AM PST

Less than 20 miles from the site where melting ice exposed the 5,000-year-old body of Ötzi the Iceman, scientists have discovered new and compelling evidence that the Italian Alps are warming at an unprecedented rate. Part of that evidence comes in the form of a single dried-out leaf from a larch tree that grew thousands of years ago.

Rising mountains dried out Central Asia

Posted: 11 Dec 2013 07:46 AM PST

The uplift of two mountain ranges in Central Asia beginning 30 million years ago expanded the Gobi Desert and set Central Asia on its path to extreme aridity, a new study suggests.

New evidence for assessing tsunami risk from very large volcanic island landslides

Posted: 11 Dec 2013 07:42 AM PST

The risk posed by tsunami waves generated by Canary Island landslides may need to be re-evaluated, according to researchers. New findings suggest that these landslides result in smaller tsunami waves than previously thought by some authors, because of the processes involved.

Supervolcanoes discovered in Utah: Evidence of some of the largest eruptions in Earth’s history

Posted: 11 Dec 2013 06:39 AM PST

Evidence of an eruption 5,000 times larger than Mount St. Helens was found in the Utah desert, with traces of ash identified as far away as Nebraska. These supervolcanoes aren’t active today, but 30 million years ago more than 5,500 cubic kilometers of magma erupted during a one-week period near a place called Wah Wah Springs. By comparison, this eruption was about 5,000 times larger than the 1980 Mount St. Helens eruption.

Runaway process drives intermediate-depth earthquakes

Posted: 11 Dec 2013 06:38 AM PST

Researchers have uncovered a vital clue about the mechanism behind a type of earthquake that originates deep within the Earth and accounts for a quarter of all temblors worldwide, some of which are strong enough to pose a safety hazard.

Post-Sandy, Long Island barrier systems appear surprisingly sound

Posted: 11 Dec 2013 04:05 AM PST

Results of a rapid response marine geophysical survey off Long Island following Hurricane Sandy show that despite the devastation on land, Sandy did not significantly disrupt the offshore barrier system that protects Long Island from long-term erosion. As a result, residents can rebuild with greater confidence the land will not begin to erode out from under them. The survey also found evidence of pollutants transferred to the offshore waters from Long Island’s south shore estuaries.

Urban sprawl threatens water quality, climate protection, and land conservation gains

Posted: 11 Dec 2013 04:05 AM PST

A groundbreaking study reveals that, if left unchecked, recent trends in the loss of forests to development will undermine significant land conservation gains in Massachusetts, jeopardize water quality, and limit the natural landscape’s ability to protect against climate change.

Serengeti’s animals under pressure

Posted: 11 Dec 2013 04:02 AM PST

Tanzania has one of the fastest growing human populations in the world, and the number of conflicts between humans and other species is expected to rise as pressure on land areas grows.

Earth’s sensitivity to climate change could be ‘double’ previous estimates, say geologists

Posted: 10 Dec 2013 04:20 AM PST

The sensitivity of Earth’s climate to carbon dioxide could be double what has been previously estimated, according to geologists.