Profiles of iron concentration from GoFlow bottles during the CARUSO-EISENEX experiment ...

• Main Authors: Nishioka, Jun, Takeda, Shigenobu, de Baar, Hein J W, Croot, Peter L, Boyé, Marie, Laan, Patrick, Timmermans, Klaas R
• Format: Dataset
• Language: English
• Published: PANGAEA 2005
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; DEPTH, water; Iron, particulate; Iron, colloidal; Iron, soluble; Iron, dissolved; Iron; Ammonium; Nitrate; Nitrite; Nitrate and Nitrite; Phosphate; Silicate; Bottle number; Go-Flo bottles; see further details; Spectrophotometry; Colorometric autoanalysis; ANT-XVIII/2; Polarstern; European Iron Enrichment Experiment in the Southern Ocean EisenEx; Antarctic; Southern Ocean; The Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.1594/pangaea.770165; https://doi.pangaea.de/10.1594/PANGAEA.770165

An in situ iron enrichment experiment was carried out in the Southern Ocean Polar Frontal Zone and fertilized a patch of water within an eddy of the Antarctic Circumpolar Current (EisenEx, Nov. 2000). During the experiment, a physical speciation technique was used for iron analysis in order to understand the changes in iron distribution and size-fractionations, including soluble Fe (<200 kDa), colloidal Fe (200 kDa-0.2 µm) and labile particle Fe (>0.2 µm), throughout the development of the phytoplankton bloom.Prior to the first infusion of iron, dissolved (<0.2 µm) iron concentrations in the ambient surface seawater were extremely low (0.06±0.015 nM) with colloidal iron being a minor fraction. For the iron addition, an acidified FeSO4 solution was released three times over a 23-day period to the eddy. High levels of dissolved iron concentrations (2.0±1.1 nM) were measured in the surface water until 4 days after the first iron infusion. After every iron infusion, when high iron concentrations were ... : Supplement to: Nishioka, Jun; Takeda, Shigenobu; de Baar, Hein J W; Croot, Peter L; Boyé, Marie; Laan, Patrick; Timmermans, Klaas R (2005): Changes in the concentration of iron in different size fractions during an iron enrichment experiment in the open Southern Ocean. Marine Chemistry, 95(1-2), 51-63 ...