(Table 1) Concentration of iron, DIP and silicic acid in water samples taken during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 (CORSACS I+II), Ross Sea ...

• Main Authors: Sedwick, Peter, Marsay, Christopher M, Sohst, Bettina M, Aguilar-Islas, Ana M, Lohan, Maeve C, Long, Matthew C, Arrigo, Kevin R, Dunbar, Robert B, Saito, Mak A, Smith, Walker O Jr, DiTullio, Giacomo R
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Event label; Mixed layer depth; DEPTH, water; Iron, dissolved; Iron, dissolvable; Iron, particulate; Nitrate and Nitrite; Phosphorus, inorganic, dissolved; Silicic acid; Bottle, Niskin; NBP0601; NBP0608; Nathaniel B. Palmer; International Polar Year 2007-2008 IPY; Austral; Ross Sea; Southern Ocean; International Polar Year; IPY
• Online Access: https://dx.doi.org/10.1594/pangaea.836573; https://doi.pangaea.de/10.1594/PANGAEA.836573

The Ross Sea polynya is among the most productive regions in the Southern Ocean and may constitute a significant oceanic CO2 sink. Based on results from several field studies, this region has been considered seasonally iron limited, whereby a "winter reserve" of dissolved iron (dFe) is progressively depleted during the growing season to low concentrations (~0.1 nM) that limit phytoplankton growth in the austral summer (December-February). Here we report new iron data for the Ross Sea polynya during austral summer 2005-2006 (27 December-22 January) and the following austral spring 2006 (16 November-3 December). The summer 2005-2006 data show generally low dFe concentrations in polynya surface waters (0.10 ± 0.05 nM in upper 40 m, n = 175), consistent with previous observations. Surprisingly, our spring 2006 data reveal similar low surface dFe concentrations in the polynya (0.06 ± 0.04 nM in upper 40 m, n = 69), in association with relatively high rates of primary production (~170-260 mmol C/m**2/d).These ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...