Latest Southern Ocean research shows continuing deep ocean change

ScienceDaily: Earth Science News

Stunning view of Lyrids and Earth at night

Posted: 21 May 2012 12:33 PM PDT

On the night of April 21, the 2012 Lyrid meteor shower peaked in the skies over Earth. While NASA allsky cameras were looking up at the night skies, astronaut Don Pettit aboard the International Space Station trained his camera on Earth. Video footage from that night is now revealing breathtaking images of Earth with meteors ablating — or burning up — in the atmosphere.

Understanding Arctic Ocean’s carbon cycle

Posted: 21 May 2012 10:28 AM PDT

Scientists have conducted a new study to measure levels of carbon at various depths in the Arctic Ocean. The study provides data that will help researchers better understand the Arctic Ocean’s carbon cycle — the pathway through which carbon enters and is used by the marine ecosystem.

Latest Southern Ocean research shows continuing deep ocean change

Posted: 21 May 2012 07:46 AM PDT

There has been a massive reduction in the amount of Antarctic bottom water found off the coast of Antarctica, new research shows.

Dry lands getting drier, wet getting wetter: Earth’s water cycle intensifying with atmospheric warming

Posted: 21 May 2012 07:46 AM PDT

A clear change in salinity has been detected in the world’s oceans, signaling shifts and an acceleration in the global rainfall and evaporation cycle. The patterns are not uniform, with regional variations agreeing with the ‘rich get richer’ mechanism, where wet regions get wetter and dry regions drier.

Toxic mercury, accumulating in the Arctic, springs from a hidden source

Posted: 21 May 2012 07:41 AM PDT

Environmental scientists have discovered that the Arctic accumulation of mercury, a toxic element, is caused by both atmospheric forces and the flow of circumpolar rivers that carry the element north into the Arctic Ocean. While the atmospheric source was previously recognized, it now appears that twice as much mercury actually comes from the rivers. The revelation implies that concentrations of the toxin may further increase as climate change continues to modify the region’s hydrological cycle and release mercury from warming Arctic soils.
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