Sequestration efficiency in the iron‐limited North Atlantic: Implications for iron supply mode to fertilized blooms. Issue 13 (8th July 2014)

• Record Type: Journal Article
• Authors: Le Moigne, Frédéric A. C.; Moore, C. Mark; Sanders, Richard J.; Villa‐Alfageme, Maria; Steigenberger, Sebastian; Achterberg, Eric P.
• Is Part Of: Geophysical research letters. Volume 41:Issue 13(2014:Jul.)
• Page Start: 4619
• Page End: 4627
• Publication Date: 2014-07-08
• Subjects: Geophysics -- Periodicals; Planets -- Periodicals; Lunar geology -- Periodicals; 550
• DOI: 10.1002/2014GL060308
• Languages: English
• ISSNs: 0094-8276

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>Estimates of the amount of carbon sequestered in the ocean interior per unit iron (Fe) supplied, as quantified by the sequestration efficiency (C<italic>_effx</italic>), vary widely. Such variability in C<italic>_effx</italic> has frequently been attributed to estimate uncertainty rather than intrinsic variability. Here we derive new estimates of C<italic>_effx</italic> for the subpolar North Atlantic, where Fe stressed conditions have recently been demonstrated. Derived values of C<italic>_effx</italic> from across the region, including areas subject to atypical external Fe fertilization events during the year of sample collection (2010), ranged from 17 to 19 kmol C (mol Fe⁻¹). Comparing these estimates with values from other systems, considered in the context of variable bloom durations in the different oceanographic settings, we suggest that apparent variability in C<italic>_effx</italic> may be related to the mode of Fe delivery.</p> </abstract>