Kevin Krajick
Kevin Krajick
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Ancient Volcanoes Once Boosted Ocean Carbon, But Humans Are Now Far Outpacing Them

Ancient Volcanoes Once Boosted Ocean Carbon, But Humans Are Now Far Outpacing Them

, ,A new study of an ancient period that is considered the closest natural analog to the era of modern human carbon emissions has found that massive volcanism sent great waves of carbon into the oceans over thousands of years—but that nature did not come close to matching what humans are doing today. The study estimates that humans are now introducing the element three to eight times faster, or possibly even more. The consequences for life both in the water and on land are potentially catastrophic. The findings appear this week in the journal Proceedings of the National Academy of...

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Kevin Krajick
Sep 14
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Climate-Driven Megadrought Is Emerging in Western U.S., Says Study

Climate-Driven Megadrought Is Emerging in Western U.S., Says Study

, ,With the western United States and northern Mexico suffering an ever-lengthening string of dry years starting in 2000, scientists have been warning for some time that climate change may be pushing the region toward an extreme long-term drought worse than any in recorded history. says the time has arrived: a megadrought as bad or worse than anything even from known prehistory is very likely in progress, and warming climate is playing a key role. The study, based on modern weather observations, 1,200 years of tree-ring data and dozens of climate models, appears this week in the leading...

columbia.edu
Kevin Krajick
Apr 16
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