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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. PANGAEA, https://doi.org/10.1594/PANGAEA.738263, Supplement to: Sedwick, P et al. (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

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Abstract:
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.
Keyword(s):
ironclimatology
Coverage:
Median Latitude: 31.254222 * Median Longitude: -64.603333 * South-bound Latitude: 30.966667 * West-bound Longitude: -65.550000 * North-bound Latitude: 31.433333 * East-bound Longitude: -63.400000
Date/Time Start: 2003-07-24T00:00:00 * Date/Time End: 2004-04-30T00:00:00
Event(s):
FeATMISS1-1 * Latitude: 31.316667 * Longitude: -64.783333 * Date/Time: 2003-07-24T00:00:00 * Campaign: FeATMISS1 * Basis: Weatherbird II * Method/Device: Bottle, Niskin (NIS)
FeATMISS1-1-P * Latitude: 31.350000 * Longitude: -64.783333 * Date/Time: 2003-07-24T00:00:00 * Campaign: FeATMISS1 * Basis: Weatherbird II * Method/Device: Water pump (PUMP)
FeATMISS1-2 * Latitude: 31.100000 * Longitude: -64.883333 * Date/Time: 2003-07-26T00:00:00 * Campaign: FeATMISS1 * Basis: Weatherbird II * Method/Device: Bottle, Niskin (NIS)
Size:
10 datasets

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Datasets listed in this publication series

  1. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) at bottle station FeATMISS1-1. https://doi.org/10.1594/PANGAEA.323719
  2. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) at bottle station FeATMISS1-2. https://doi.org/10.1594/PANGAEA.323720
  3. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) at bottle station FeATMISS1-3. https://doi.org/10.1594/PANGAEA.323721
  4. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) at bottle station FeATMISS1-4. https://doi.org/10.1594/PANGAEA.323722
  5. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) at bottle station FeATMISS1-5. https://doi.org/10.1594/PANGAEA.323723
  6. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) at bottle station FeATMISS1-6. https://doi.org/10.1594/PANGAEA.323724
  7. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) at bottle station FeATMISS2-1. https://doi.org/10.1594/PANGAEA.323725
  8. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) at bottle station FeATMISS2-2. https://doi.org/10.1594/PANGAEA.323726
  9. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) in surface water during cruise FeATMISS1. https://doi.org/10.1594/PANGAEA.323728
  10. Sedwick, P; Church, TM; Bowie, AR et al. (2005): Iron in the Sargasso Sea (BATS region) in surface water during cruise FeATMISS2. https://doi.org/10.1594/PANGAEA.323729