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Earths inner core is solid, 'J waves' suggest

Fri, 19 Oct 2018 13:51:24 EDT ~ A new study could help us understand how our planet was formed. Scientists report that their research shows that Earth's inner core is solid -- a finding made possible by a new method for detecting shear waves, or 'J waves' in the inner core. Find out more...

Arctic greening thaws permafrost, boosts runoff

Wed, 17 Oct 2018 17:28:41 EDT ~ A new collaborative study has investigated Arctic shrub-snow interactions to obtain a better understanding of the far north's tundra and vast permafrost system. Incorporating extensive in situ observations, scientists tested their theories with a novel 3D computer model and confirmed that shrubs can lead to significant degradation of the permafrost layer that has remained frozen for tens of thousands of years. These interactions are driving increases in discharges of fresh water into rivers, lakes and oceans. Find out more...

Life on the floor of the Arctic Ocean, with rigor and in detail

Wed, 17 Oct 2018 14:10:11 EDT ~ In an extensive and rigorous study of animal life on the Central Arctic Ocean floor, researchers have shown that water depth and food availability influence the species composition, density, and biomass of benthic communities. Find out more...

Arctic ice sets speed limit for major ocean current

Wed, 17 Oct 2018 14:09:25 EDT ~ Scientists have now identified a key mechanism, which they call the 'ice-ocean governor,' that controls how fast the Beaufort Gyre spins and how much fresh water it stores. Researchers report that the Arctic's ice cover essentially sets a speed limit on the gyre's spin. Find out more...

World Heritage Sites threatened by rising sea levels

Wed, 17 Oct 2018 11:10:22 EDT ~ In the Mediterranean region, there are numerous UNESCO World Heritage Sites in low-lying coastal areas. In the course of the 21st century, these sites will increasingly be at risk by storm surges and increasing coastal erosion due to sea-level rise. Find out more...

Antarctic ice shelf 'sings' as winds whip across its surface

Tue, 16 Oct 2018 15:06:54 EDT ~ Winds blowing across snow dunes on Antarctica's Ross Ice Shelf cause the massive ice slab's surface to vibrate, producing a near-constant set of seismic 'tones' scientists could potentially use to monitor changes in the ice shelf from afar, according to new research. Find out more...

Climate models fail to simulate recent air-pressure changes over Greenland

Tue, 16 Oct 2018 13:20:32 EDT ~ Climatologists may be unable to accurately predict regional climate change over the North Atlantic because computer simulations have failed to include real data from the Greenland region over the last three decades -- and it could lead to regional climate predictions for the UK and parts of Europe being inaccurate. Find out more...

Can forests save us from climate change?

Tue, 16 Oct 2018 11:01:14 EDT ~ Additional climate benefits through sustainable forest management will be modest and local rather than global. Even if Europe's forests are managed in such a way that their carbon sequestration is maximized it will not impact the climate significantly. Find out more...

Forest carbon stocks have been overestimated for 50 years

Tue, 16 Oct 2018 11:01:00 EDT ~ A formula used to calculate basic wood density has recently been corrected. Basic density is widely used to compute carbon storage by trees. Researchers estimate that the error in the initial formula resulted in an overestimation of forest carbon stocks, to the tune of almost 5 percent. Find out more...

Arctic sea ice decline driving ocean phytoplankton farther north

Mon, 15 Oct 2018 14:15:14 EDT ~ A new study reveals phytoplankton spring blooms in the Arctic Ocean, which were previously nonexistent, are expanding northward at a rate of one degree of latitude per decade. Although blooms did not previously occur in this area, phytoplankton were present in the Arctic's central basin at low biomass. The study also found the primary productivity of the phytoplankton, or the rate at which phytoplankton convert sunlight into chemical energy, is increasing during the spring blooms. Find out more...