| 摘要: |
| 讨论了中国第六次南大洋考察4条断面1个海湾计30个剖面海水中碘的赋存形式及化学形态的生物地球化学分布。结果表明，表层海水总无机碘含量分有值在0.267－0.443 μmol/dm3之间；海水无机碘及碘酸根含量的垂直分布与营养盐关系密切，溶解有机碘分布则较稳定，其含量约为总无机碘的10％。真光层内浮游植物对碘的吸收同化速率为0.17 μmol/(m2?d)，悬浮有机颗粒中碘的结合量约为4.3 μmol/m3，真光层内颗粒碘的下沉速率大于7.2 d/m。根据讨论结果提出了测区真光层内碘循环的生物地球化学模式。 |
| 关键词: 碘 营养盐 南大洋 生物地球化学 模式 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助，0487013号 |
附件 |
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| BIOLIMITATION OF IODINE DISTRIBUTION IN ANTARCTIC OCEAN |
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Cheng Xianhao, Pan Jianming, Zhang Haisheng, Zhang Ping
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Second Institute of Oceanography, SOA, Hangzhou 310012
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| Abstract: |
| Based on the analysis of samples collected during Sixth Chinese Antarctic Exploration, this paper discusses the geochemical distribution of iodine species and chemical forms. Special interest is directed to the relations among the iodine species, and parameters related to organism activity. The concentrations of total inorganic iodine are from 0.267 to 0.443 μmol/dm3 (mostly iodate) in the surface seawater. There are closely relations between nutrients and the concentrations of iodine and iodate. The results shows dissolved organic iodine concentration distributes stably horizontally and vertically is about 10% of the total inorganic iodine. The absorption and assimilation rate of phytoplankton for iodine is about 0.17 μmol/(m2?d); the associated iodine as suspended organic particulates is about 4.3 μmol/m3, in which the iodine instanding crop averages 16%. The deposite rate of the particulate iodine is more than 7.2 d/m, within the euphotic zone. A biogeochemical cycle model is proposed. |
| Key words: Iodine, Nutrient, Antarctic Ocean, Biogeochemistry |
