Sequestration efficiency in the iron-limited North Atlantic: Implications for iron supply mode to fertilized blooms.

Le Moigne, Frederic A. C., Moore, C. Mark, Sanders, Richard J., Villa-Alfageme, Maria, Steigenberger, Sebastian and Achterberg, Eric P. (2014) Sequestration efficiency in the iron-limited North Atlantic: Implications for iron supply mode to fertilized blooms. Open Access Geophysical Research Letters, 41 (13). pp. 4619-4627. DOI 10.1002/2014GL060308.

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Abstract

Estimates of the amount of carbon sequestered in the ocean interior per unit iron (Fe) supplied, as quantified by the sequestration efficiency (Ceffx), vary widely. Such variability in Ceffx has frequently been attributed to estimate uncertainty rather than intrinsic variability. Here we derive new estimates of Ceffx for the subpolar North Atlantic, where Fe stressed conditions have recently been demonstrated. Derived values of Ceffx 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 Ceffx may be related to the mode of Fe delivery.

Document Type: Article
Additional Information: WOS:000340295300028
Keywords: carbon export; North Atlantic; iron limitation; RSS Discovery ; IBIS cruises D350/354
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1002/2014GL060308
ISSN: 0094-8276
Date Deposited: 24 Sep 2014 11:14
Last Modified: 10 Apr 2017 08:33
URI: http://oceanrep.geomar.de/id/eprint/25641

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