Unknown
Sedwick, Peter
;
Church, T M
;
Bowie, Andrew R
;
[et al.]
Marsay, Christopher M
;
Ussher, S J
;
Achilles, K M
;
Lethaby, P J
;
Johnson, Rodney J
;
Sarin, Manmohan M
;
McGillicuddy, Dennis
PANGAEA
In:
Supplement to: 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): Iron in the Sargasso Sea (Bermuda Atlantic Time-series Study region) during summer: Eolian imprint, spatiotemporal variability, and ecological implications. Global Biogeochemical Cycles, 19, GB4006, https://doi.org/10.1029/2004GB002445
Publication Date:
2023-06-23
Description:
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/m**3), to ~0.1-0.2 nM in spring 2004, when aerosol iron concentrations were low (mean 0.64 nmol/m**3). 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.
Keywords:
Bottle, Niskin; FeATMISS1; FeATMISS1-1; FeATMISS1-1-P; FeATMISS1-2; FeATMISS1-2-P; FeATMISS1-3; FeATMISS1-3-P; FeATMISS1-4; FeATMISS1-4-P; FeATMISS1-5; FeATMISS1-5-P; FeATMISS1-6; FeATMISS1-6-P; FeATMISS2; FeATMISS2-1; FeATMISS2-1-P; FeATMISS2-2; FeATMISS2-2-P; ironclimatology; NIS; PUMP; Water pump; Weatherbird II
Type:
Dataset
Format:
application/zip, 10 datasets
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