SIPEX data iron site - Aurora Australis voyage Sept-Oct 2007

This work was completed as part of the SIPEX - Sea Ice Physics and Ecosystem eXperiment - voyage. Adapted from the SIPEX website: During SIPEX we investigated the biogeochemistry of iron (Fe), including a comprehensive examination of its distribution, speciation (i.e. the different forms of Fe), cycling and its role in fuelling sea ice-based and pelagic algal communities. A major part of this research concentrated on the influence of organic exopolysaccharides (EPS) on Fe solubility and its bio-availability. The distribution of other bioactive trace elements was also examined as a means of fingerprinting the source(s) of Fe, as well as indicating their biological requirements. ######### Data on the small- to medium scale (0.1-1000 m) spatial and temporal distribution of Fe and EPS in sea ice cores, surface snow, brine and underlying seawater were determined in each sampled medium by the interdisciplinary team working on the SIPEX project (AAS 3026) in the East Antarctic sector in September/October 2007. Data include Chlorophyll a, salinity, temperature, sea-ice thickness, ice texture analysis, macro-nutrients (nitrate, phosphate, silicate), oxygen stable isotopes, POC and DOC, EPS, iron. This work was completed as part of AAS (ASAC) project 3026. See the parent metadata record (ASAC_3026) for more information.本研究系SIPEX——海冰物理与生态实验（Sea Ice Physics and Ecosystem eXperiment）航次的研究内容之一。 改编自SIPEX官方网站： 在SIPEX航次期间，本团队针对铁（Fe）的生物地球化学特征展开研究，全面剖析其分布、化学形态（即铁的不同存在形式）、循环过程，以及其在支撑海冰源与浮游藻类群落生长中的作用。本研究的核心内容之一聚焦于有机胞外多糖（EPS）对铁溶解度及其生物可利用性的影响。研究同时对其他生物活性微量元素的分布特征进行了考察，以此作为铁源溯源的标记手段，同时揭示这些微量元素的生物需求特性。 ######### 2007年9月至10月，参与SIPEX项目（AAS 3026）的跨学科研究团队在南极东部海域，针对海冰岩芯、表层积雪、卤水及下层海水中铁与EPS的中小尺度（0.1~1000米）时空分布特征展开采样测定，覆盖所有采样介质。本次采集的数据涵盖叶绿素a、盐度、温度、海冰厚度、冰纹理分析数据、大量营养盐（硝酸根、磷酸根、硅酸根）、氧稳定同位素、颗粒有机碳（POC）与溶解有机碳（DOC）、胞外多糖以及铁相关数据。 本研究系澳大利亚南极局（AAS）南极科学咨询委员会（ASAC）资助的3026号项目的研究内容之一，更多信息可参阅其父级元数据记录（ASAC_3026）。