engleski

Temporal variability of carbon fluxes in the subtropical Atlantic at 24.5°N

A transatlantic hydrographic section including carbon measurements has been occupied in 1992, 1998 and 2004, allowing us to examine decadal changes in the circulation and fluxes of heat, salt and carbon and the net budgets north of 24.5°N. The principal changes in the circulation have been a reduction in the overturning circulation, compensated by an increase in southward thermocline circulation shallower than 1000m. The northward transport of inorganic carbon/anthropogenic carbon in the Gulf Stream is increasing with time and is compensated by an increasing southward flux in the interior. The net flux for inorganic carbon is southward and for anthropogenic carbon is northward. Here we examine the sensitivity of the net fluxes to and of inferences of their temporal changes to uncertainties in the circulation and for anthropogenic carbon in particular to it’ s method of estimation.

Atlantic; carbon fluxes

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