Geophysicists employ novel method to identify sources of global sea level rise

Warm ocean currents cause majority of ice loss from Antarctica

Posted: 25 Apr 2012 11:03 AM PDT

Warm ocean currents are the dominant cause of recent ice loss from Antarctica, new research shows. New techniques have been used to differentiate, for the first time, between the two known causes of melting ice shelves – warm ocean currents attacking the underside, and warm air melting from above. This finding brings scientists a step closer to providing reliable projections of future sea-level rise.

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.

Geophysicists employ novel method to identify sources of global sea level rise

Posted: 24 Apr 2012 11:22 AM PDT

As the Earth’s climate warms, a melting ice sheet produces a distinct pattern of sea level change known as its sea level fingerprint. Now, geophysicists have found a way to identify the sea level fingerprint left by a particular ice sheet, and possibly enable a more precise estimate of its impact on global sea levels.

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