Natural forcing of the North Atlantic nitrogen cycle in the Anthropocene.

ABSTRACT: Human alteration of the global nitrogen cycle intensified over the 1900s. Model simulations suggest that large swaths of the open ocean, including the North Atlantic and the western Pacific, have already been affected by anthropogenic nitrogen through atmospheric transport and deposition. Here we report an ∼130-year-long record of the ¹⁵N/¹⁴N of skeleton-bound organic matter in a coral from the outer reef of Bermuda, which provides a test of the hypothesis that anthropogenic atmospheric nitrogen has significantly augmented the nitrogen supply to the open North Atlantic surface ocean. The Bermuda ¹⁵N/¹⁴N record does not show a long-term decline in the Anthropocene of the amplitude predicted by model simulations or observed in a western Pacific cor

SUBMITTER: Wang XT 

PROVIDER: S-EPMC6196544 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature