IRON PHOTOCHEMISTRY IN SEAWATER FROM THE EQUATORIAL PACIFIC
IRON PHOTOCHEMISTRY IN SEAWATER FROM THE EQUATORIAL PACIFIC
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DOI：
10.1016/0304-4203(94)90029-9
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发表时间：
1994-07-01
期刊：
影响因子：
3
通讯作者：
TINDALE, NW
中科院分区：
文献类型：
--
作者：
JOHNSON, KS;COALE, KH;TINDALE, NW
在赤道太平洋的两次航行中，研究了表层沃茨铁的光化学及其对铁生物利用度的影响。在赤道海水中加入各种化学形式的铁，进行失时效孵育。结果显示，可测量的铁水平有明确的昼夜模式，最高水平出现在中午。这些结果与涉及胶体铁的光还原溶解及其随后的氧化和溶解铁（III）的生物吸收的铁循环模型是一致的。模型计算是基于独立确定的速率常数。我们认为，光化学反应可能有显着的影响铁的可用性浮游植物在公海。
The photochemistry of iron in surface waters, and its implications to iron bioavailability, was examined on two cruises to the equatorial Pacific. Decktop incubations were performed with equatorial seawater to which iron was added in various chemical forms. Results showed clear diurnal patterns in measurable iron levels, with the highest levels occurring midday. These results are consistent with a model of iron cycling involving the photo-reductive dissolution of colloidal iron and its subsequent oxidation and biological uptake of dissolved iron(III). Model calculations were based on independently determined rate constants. We suggest that photochemical reactions may have a significant impact on iron availability to phytoplankton in the open ocean.