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Greenland ice core analysis shows drastic climate change near end of last ice age

Information gleaned from a Greenland ice core by an international science team shows that two huge Northern Hemisphere temperature spikes prior to the close of the last ice age some 11,500 years ago were tied to fundamental shifts in atmospheric circulation.

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Ice flow alone explains why fjords are cut so deep

A variety of factors was thought to be behind the rapid and deep incisions that become fjords, made as ice sheets flow down from the mountains. Mark Kessler of the University of Colorado at Boulder and his colleagues now reckon the process is simpler than that.

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Is nitrogen the new carbon?

A discussion with ecologist Alan Townsend on mankind’s love-hate relationship with nitrogen, and how this marriage can be saved.

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Dead water: Too much nitrogen being washed into the sea is causing dead zones to spread alarmingly

Hundreds of the world's coastal regions have dead zones that occur when spring rainfall makes its way into streams and rivers, carrying a cargo of nitrogen and other nutrients from fertilizers and other sources, and eventually tumbles down to the ocean. Nutrient run-off from land is increasing the number, size, duration and severity of the dead zones.

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Geomorphology: Where glaciers cut deep

Researchers have developed an elegant concept for fjord formation using a relatively simple model. Video included.

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Conservation strategies must shift with global environmental change, ecologists urge

Traditional ecosystems in which communities of plants and animals have co-evolved and are interdependent are increasingly rare, due to human-induced ecosystem changes. Scientists are now suggesting that efforts should focus less on restoring ecosystems to their original state and more on sustaining new, healthy ecosystems that are resilient to further environmental change.

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