Contents Pages by Subject

Climate Change

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"It's a complex interaction of forces, and the environment has to be conducive," he said. "You need a very special setup to get a derecho -- obviously, that was the case [on June 29]."

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The farther they ventured into the ice-covered sea for their NASA-funded project to study ice, the more intense the under-ice algae bloom, says Arrigo, a veteran of many trips to the Arctic and Antarctic. “It was shocking,” he says.

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Now, a new study reveals that the northern treeline in Rocky Mountains was at a much higher altitude from six to nine thousand years ago, which confirms the extra warm climate was not just limited to the Finland/Siberia areas.

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In a study published in the journal Nature Geoscience, a team led by Yadu Pokhrel of the University of Tokyo say the answer lies in water that is extracted from underground aquifers, rivers and lakes for human development but is never replenished.

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