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Special Series

Ken O. Buesseler

To Fertilize, or Not to Fertilize

To Fertilize, or Not to Fertilize

Global warming is “unequivocal,” the Intergovernmental Panel on Climate Change (IPCC) reported in November 2007. Human actions—particularly the burning of…

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A New Way to Catch the Rain

The carbon budget of the upper ocean includes an important loss to the deep ocean due to a very slowly falling rain of organic particles, usually called sediment. As this sediment falls through the upper water column it is consumed, mainly by bacteria, and the carbon is recycled into nonsinking forms (dissolved or colloidal organic carbon or inorganic forms). Thus the sediment rain decreases with increasing depth in the water column, and only a tiny fraction reaches the deep sea floor, less than about one percent.

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