Processes Affecting the Speciation of Iodine in the Oceans

9301298黄碘在海水中以IO3-的形式存在，而I-尽管I-相对于IO3在热力学上不稳定。尽管碘是海洋中含量最丰富的亲生物次要元素，而且公开海洋中IO3和I的分布相对来说是众所周知的，但关于可能控制其物种形成的过程的直接证据在很大程度上是不完整的。南大西洋海湾和东中国海的初步数据表明，IO3-可能优先在陆架海还原为I-。在陆架内部，减少可能在内陆架和毗邻的沼泽和泻湖中特别有效。因此，在边缘海和大洋内陆之间的交换过程中，富碘水可能被添加到陆架，而富碘水可能被输出到大洋内陆。这一模型将通过更多的实地观测进行测试，以评估生物和非生物过程在控制IO3-还原方面的相对重要性。

\9301298 Wong Iodine can be found in seawater as IO3- and I- although I- is thermodynamically unstable relative to IO3. Although iodine is the most abundant biophilic minor element in the ocean and the distribution of IO3- and I- in the open oceans are relatively well known, direct evidence on the processes that may control its speciation is largely incomplete. Preliminary data from the South Atlantic Bight and East China Sea suggest that IO3- may be reduced to I- preferentially in the shelf-seas. Within the shelf, the reduction may be especially efficient in the inner shelf and the adjoining marshes and lagoons. Thus, during the exchanges between the marginal seas and the ocean interior, IO3- rich water may be added to the shelf while I- rich water may be exported to the ocean interior. This model will be tested with additional field observations to assess the relative importance of biological and non-biological processes in controlling the reduction of IO3-.