Authigenic mineral phases as a driver of the upper-ocean iron cycle
Authigenic mineral phases as a driver of the upper-ocean iron cycle
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自生矿物相作为上层海洋铁循环的驱动力
DOI：
10.1038/s41586-023-06210-5
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发表时间：
2023
期刊：
影响因子：
64.8
通讯作者：
König, Daniela
中科院分区：
文献类型：
--
作者：
Tagliabue, Alessandro;Buck, Kristen N.;Sofen, Laura E.;Twining, Benjamin S.;Aumont, Olivier;Boyd, Philip W.;Caprara, Salvatore;Homoky, William B.;Johnson, Rod;König, Daniela
铁对于调节海洋碳循环很重要。尽管多种溶解和颗粒物质参与海洋铁循环，但目前的认识强调有机配体络合作用在稳定海洋溶解铁浓度方面的重要性,,,, –。然而，很难将这种配体作为溶解铁循环主要控制的观点与观察到的溶解铁物种的尺寸分配、深度溶解铁再生效率低下或颗粒铁观测数据集中自生铁相的潜在重要性相协调。在这里，我们提出了来自百慕大大西洋时间序列研究 (BATS) 地区的新溶解铁、配体和颗粒铁季节性数据集。我们发现，上层海洋溶解铁的动力学与配体的动力学脱钩，这需要一个过程，通过这个过程，溶解的铁逃离配体的稳定，从而产生沉降到深度的自生铁颗粒库。当这种“胶体分流”机制在全球规模的生物地球化学模型中实施时，它再现了季节性铁循环动态观测结果和先前模型失败时的独立全球数据集。总的来说，我们认为，在控制海洋溶解铁的分布以及溶解和颗粒铁池之间的耦合时，必须考虑自生颗粒铁相的周转以及生物活性和配体。
Iron is important in regulating the ocean carbon cycle. Although several dissolved and particulate species participate in oceanic iron cycling, current understanding emphasizes the importance of complexation by organic ligands in stabilizing oceanic dissolved iron concentrations, , , –. However, it is difficult to reconcile this view of ligands as a primary control on dissolved iron cycling with the observed size partitioning of dissolved iron species, inefficient dissolved iron regeneration at depth or the potential importance of authigenic iron phases in particulate iron observational datasets, , , , –. Here we present a new dissolved iron, ligand and particulate iron seasonal dataset from the Bermuda Atlantic Time-series Study (BATS) region. We find that upper-ocean dissolved iron dynamics were decoupled from those of ligands, which necessitates a process by which dissolved iron escapes ligand stabilization to generate a reservoir of authigenic iron particles that settle to depth. When this ‘colloidal shunt’ mechanism was implemented in a global-scale biogeochemical model, it reproduced both seasonal iron-cycle dynamics observations and independent global datasets when previous models failed, –. Overall, we argue that the turnover of authigenic particulate iron phases must be considered alongside biological activity and ligands in controlling ocean-dissolved iron distributions and the coupling between dissolved and particulate iron pools.
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影响因子：
9.5
作者：
R. Séférian;S. Berthet;A. Yool;J. Palmiéri;L. Bopp;A. Tagliabue;L. Kwiatkowski;O. Aumont;J. Christian;J. Dunne;M. Gehlen;T. Ilyina;J. John;Hongmei Li;M. Long;Jessica Y. Luo;H. Nakano;A. Romanou;J. Schwinger;C. Stock;Yeray Santana-Falcón;Y. Takano;J. Tjiputra;H. Tsujino;Michio Watanabe;Tongwen Wu;Fanghua Wu;A. Yamamoto
通讯作者：
R. Séférian;S. Berthet;A. Yool;J. Palmiéri;L. Bopp;A. Tagliabue;L. Kwiatkowski;O. Aumont;J. Christian;J. Dunne;M. Gehlen;T. Ilyina;J. John;Hongmei Li;M. Long;Jessica Y. Luo;H. Nakano;A. Romanou;J. Schwinger;C. Stock;Yeray Santana-Falcón;Y. Takano;J. Tjiputra;H. Tsujino;Michio Watanabe;Tongwen Wu;Fanghua Wu;A. Yamamoto
在三维生物地球化学海洋模型中模拟有机铁结合配体
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
C. Völker;A. Tagliabue
通讯作者：
A. Tagliabue
呼吁完善类腐殖质物质在海洋铁循环中的作用
影响因子：
4.6
作者：
S. Rauschenberg;B. Twining
通讯作者：
B. Twining
再生通量和清除通量之间的相互作用驱动海洋铁循环
影响因子：
16.6
作者：
A. Tagliabue;A. Bowie;T. DeVries;M. Ellwood;W. Landing;A. Milne;D. Ohnemus;B. Twining;P. Boyd
通讯作者：
P. Boyd
影响因子：
4.9
作者：
T. Wagener;C. Guieu;N. Leblond
通讯作者：
T. Wagener;C. Guieu;N. Leblond