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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Natural variability of the North Atlantic carbon cycle is modeled for 1948–2009. The dominant mode of surface ocean CO2 variability is associated with sea surface temperature (SST) variability composed of (a) the Atlantic Multidecadal Oscillation (AMO) and (b) a positive SST trend. In the subpolar gyre, positive AMO is associated with reduced vertical mixing that lowers pCO2. In the subtropical gyre, AMO-associated warming increases pCO2. Since 1980, the SST trend has amplified AMO impacts.
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Articles | Volume 13, issue 11
Biogeosciences, 13, 3387–3396, 2016
https://doi.org/10.5194/bg-13-3387-2016
Biogeosciences, 13, 3387–3396, 2016
https://doi.org/10.5194/bg-13-3387-2016

Research article 09 Jun 2016

Research article | 09 Jun 2016

Climate impacts on multidecadal pCO2 variability in the North Atlantic: 1948–2009

Melissa L. Breeden and Galen A. McKinley

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Short summary
Natural variability of the North Atlantic carbon cycle is modeled for 1948–2009. The dominant mode of surface ocean CO2 variability is associated with sea surface temperature (SST) variability composed of (a) the Atlantic Multidecadal Oscillation (AMO) and (b) a positive SST trend. In the subpolar gyre, positive AMO is associated with reduced vertical mixing that lowers pCO2. In the subtropical gyre, AMO-associated warming increases pCO2. Since 1980, the SST trend has amplified AMO impacts.
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