Iron in the Sargasso Sea

We report iron measurements for water column and aerosol samples collected in the Sargasso Sea during July-August 2003 (summer 2003) and April-May 2004 (spring 2004). Our data reveal a large seasonal change in the dissolved iron (dFe) concentration of surface waters in the Bermuda Atlantic Time-series Study region, from ~1-2 nM in summer 2003, when aerosol iron concentrations were high (mean 10 nmol/m3), to ~0.1-0.2 nM in spring 2004, when aerosol iron concentrations were low (mean 0.64 nmol/m3). During summer 2003, we observed an increase of ~0.6 nM in surface water dFe concentrations over 13 days, presumably due to eolian iron input; an estimate of total iron deposition over this same period suggests an effective solubility of 3-30% for aerosol iron. Our summer 2003 water column profiles show potentially growth-limiting dFe concentrations (0.02-0.19 nM) coinciding with a deep chlorophyll maximum at 100-150 m depth, where phytoplankton biomass is typically dominated by Prochlorococcus during late summer.

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Cite this as

Sedwick, Peter, Church, T M, Bowie, Andrew R, Marsay, Christopher M, Ussher, S J, Achilles, K M, Lethaby, P J, Johnson, Rodney J, Sarin, Manmohan M, McGillicuddy, Dennis (2005). Dataset: Iron in the Sargasso Sea. https://doi.org/10.1594/PANGAEA.738263

DOI retrieved: 2005

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.738263
Author Sedwick, Peter
Given Name Peter
Family Name Sedwick
More Authors
Church, T M
Bowie, Andrew R
Marsay, Christopher M
Ussher, S J
Achilles, K M
Lethaby, P J
Johnson, Rodney J
Sarin, Manmohan M
McGillicuddy, Dennis
Source Creation 2005
Publication Year 2005
Resource Type application/zip - filename: Sedwick_2005
Subject Areas
Name: Atmosphere

Name: Ecology

Name: Lithosphere

Related Identifiers
Title: Iron in the Sargasso Sea (Bermuda Atlantic Time-series Study region) during summer: Eolian imprint, spatiotemporal variability, and ecological implications
Identifier: https://doi.org/10.1029/2004GB002445
Type: DOI
Relation: IsSupplementTo
Year: 2005
Source: Global Biogeochemical Cycles
Authors: Sedwick Peter , Church T M , Bowie Andrew R , Marsay Christopher M , Ussher S J , Achilles K M , Lethaby P J , Johnson Rodney J , Sarin Manmohan M , McGillicuddy Dennis .