Biogeosciences
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Articles | Volume 15, issue 20
Articles | Volume 15, issue 20
https://doi.org/10.5194/bg-15-6049-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-15-6049-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 20
Research article
 | 
16 Oct 2018
Research article |  | 16 Oct 2018

Mechanisms of northern North Atlantic biomass variability

Galen A. McKinley, Alexis L. Ritzer, and Nicole S. Lovenduski

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Short summary
Phytoplankton biomass changed significantly in the North Atlantic north of 40° N over 1998–2007. With a physical-ecosystem model, we show that biomass increases in the northwest are due to reduced vertical mixing that partially relieves light limitation of phytoplankton. To the east, these circulation changes lead to fewer nutrients being supplied horizontally from the west. Relationships between these biomass variations and atmosphere and ocean physics are not straightforward.
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