Sequestration efficiency in the iron-limited North Atlantic: Implications for iron supply mode to fertilized blooms
Type | Article | ||||||||||||||||
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Date | 2014-07-16 | ||||||||||||||||
Language | English | ||||||||||||||||
Author(s) | Le Moigne Frederic A. C.1, Moore C. Mark2, Sanders Richard J.1, Villa-Alfageme Maria3, Steigenberger Sebastian2, Achterberg Eric P.2, 4 | ||||||||||||||||
Affiliation(s) | 1 : Natl Oceanog Ctr, Southampton, Hants, England. 2 : Univ Southampton, Southampton, Hants, England. 3 : Univ Seville, Dept Fis Aplicada 2, Seville, Spain. 4 : Helmholtz Ctr Ocean Res Kiel, GEOMAR, Kiel, Germany. |
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Source | Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2014-07-16 , Vol. 41 , N. 13 , P. 4619-4627 | ||||||||||||||||
DOI | 10.1002/2014GL060308 | ||||||||||||||||
WOS© Times Cited | 14 | ||||||||||||||||
Abstract | Estimates of the amount of carbon sequestered in the ocean interior per unit iron (Fe) supplied, as quantified by the sequestration efficiency (C-effx), vary widely. Such variability in C-effx has frequently been attributed to estimate uncertainty rather than intrinsic variability. Here we derive new estimates of C-effx for the subpolar North Atlantic, where Fe stressed conditions have recently been demonstrated. Derived values of C-effx 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-effx may be related to the mode of Fe delivery. | ||||||||||||||||
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