Study finds surprising Arctic methane emission source

ScienceDaily: Earth Science News

Study finds surprising Arctic methane emission source

Posted: 24 Apr 2012 11:51 AM PDT

The fragile and rapidly changing Arctic region is home to large reservoirs of methane, a potent greenhouse gas. As Earth’s climate warms, the methane, frozen in reservoirs stored in Arctic tundra soils or marine sediments, is vulnerable to being released into the atmosphere, where it can add to global warming. Now a multi-institutional study has uncovered a surprising and potentially important new source of Arctic methane: the ocean itself.

NASA tests GPS monitoring system for big U.S. quakes

Posted: 24 Apr 2012 11:47 AM PDT

The space-based technology that lets GPS-equipped motorists constantly update their precise location will undergo a major test of its ability to rapidly pinpoint the location and magnitude of strong earthquakes across the western United States. Results from the new Real-time Earthquake Analysis for Disaster (READI) Mitigation Network soon could be used to assist prompt disaster response and more accurate tsunami warnings.

Fireball over California/Nevada: How big was it?

Posted: 24 Apr 2012 11:44 AM PDT

A bright ball of light traveling east to west was seen over the skies of central/northern California Sunday morning, April 22. The former space rock-turned-flaming-meteor entered Earth’s atmosphere around 8 a.m. PDT. Reports of the fireball have come in from as far north as Sacramento, Calif. and as far east as North Las Vegas, Nev.

Following life’s chemistry to the earliest branches on the tree of life

Posted: 24 Apr 2012 11:21 AM PDT

Scientists have traced the development of life-sustaining chemistry to the earliest forms of life on Earth.

Northern Canada feels the heat:Climate change impact on permafrost zones

Posted: 24 Apr 2012 07:00 AM PDT

As climate change in the near future is likely to bring raised temperatures at northern latitudes, the characteristics of permafrost could greatly change. Changes to permafrost could have serious impact on existing and future northern infrastructures such as pipelines and could significantly affect northern communities. This study provides one of the first summaries of climate and permafrost temperature relations across northern Canada and provides valuable information needed to prepare for future.
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