Quantifying trace element and isotope fluxes at the ocean-sediment boundary: a review.
Quantifying trace element and isotope fluxes at the ocean-sediment boundary: a review.
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DOI：
10.1098/rsta.2016.0246
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发表时间：
2016-11-28
期刊：
影响因子：
--
通讯作者：
Tagliabue A
中科院分区：
文献类型：
--
作者：
Homoky WB;Weber T;Berelson WM;Conway TM;Henderson GM;van Hulten M;Jeandel C;Severmann S;Tagliabue A
定量海洋沉积物-水边界的微量元素及其同位素（TEI）通量是了解其在现在、过去和未来海洋中作用的一个突出挑战。有多种过程驱动TEI的吸收和释放，并且决定其速率的特性分布不均匀（例如沉积物组成，氧化还原条件和（生物）物理动力学）。这些因素使我们寻找、测量和外推跨洋盆TEI通量的努力复杂化。GEOTRACES观测首次揭示了许多TEI的海洋分布。这些数据证明了沉积物-水边界对许多TEI循环的影响，并强调了这样一个事实，即我们对维持海洋分布的源汇通量的了解在很大程度上是缺失的。目前的通量测量提供低的空间覆盖范围和预测TEI通量变化所需的经验基础的一部分。TEI通量测量的许多进展和目前面临的挑战与收集沉积物芯、孔隙沃茨、下沉物质或与沉积物密切接触的海水的过程研究有关。然而，这种取样在GEOTRACES考察中通常不可行。在这篇文章中，我们建议的方法来解决这些问题：首先，与询问的紧急数据使用同位素质量平衡和逆建模技术;其次，通过创新的追求直接TEI通量测量。我们将GEOTRACES数据的价值与一个新的逆模型估计在北大西洋底栖铝通量。此外，我们审查可行的通量测量技术，适合于沉积物-水边界。我们建议，这些活动的目标是交叉的区域的GEOTRACES科学计划的基础上，可能会影响TEI通量的七个标准：沉积物的来源，成分，有机碳供应，氧化还原条件，沉积速率，测深和海底nepheloid库存。这篇文章是主题问题“海洋微量元素化学的生物和气候影响”的一部分。
Quantifying fluxes of trace elements and their isotopes (TEIs) at the ocean's sediment–water boundary is a pre-eminent challenge to understand their role in the present, past and future ocean. There are multiple processes that drive the uptake and release of TEIs, and properties that determine their rates are unevenly distributed (e.g. sediment composition, redox conditions and (bio)physical dynamics). These factors complicate our efforts to find, measure and extrapolate TEI fluxes across ocean basins. GEOTRACES observations are unveiling the oceanic distributions of many TEIs for the first time. These data evidence the influence of the sediment–water boundary on many TEI cycles, and underline the fact that our knowledge of the source–sink fluxes that sustain oceanic distributions is largely missing. Present flux measurements provide low spatial coverage and only part of the empirical basis needed to predict TEI flux variations. Many of the advances and present challenges facing TEI flux measurements are linked to process studies that collect sediment cores, pore waters, sinking material or seawater in close contact with sediments. However, such sampling has not routinely been viable on GEOTRACES expeditions. In this article, we recommend approaches to address these issues: firstly, with an interrogation of emergent data using isotopic mass-balance and inverse modelling techniques; and secondly, by innovating pursuits of direct TEI flux measurements. We exemplify the value of GEOTRACES data with a new inverse model estimate of benthic Al flux in the North Atlantic Ocean. Furthermore, we review viable flux measurement techniques tailored to the sediment–water boundary. We propose that such activities are aimed at regions that intersect the GEOTRACES Science Plan on the basis of seven criteria that may influence TEI fluxes: sediment provenance, composition, organic carbon supply, redox conditions, sedimentation rate, bathymetry and the benthic nepheloid inventory. This article is part of the themed issue ‘Biological and climatic impacts of ocean trace element chemistry’.
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影响因子：
5
作者：
Aquilina, Alfred;Homoky, William B.;Mills, Rachel A.
通讯作者：
Mills, Rachel A.
影响因子：
4.5
作者：
BENDER, M;MARTIN, W;LAMBERT, C
通讯作者：
LAMBERT, C
DOI：
10.1016/0198-0149(86)90045-2
发表时间：
1986-10-01
期刊：
DEEP-SEA RESEARCH PART A-OCEANOGRAPHIC RESEARCH PAPERS
影响因子：
--
作者：
BERELSON, WM;HAMMOND, DE
通讯作者：
HAMMOND, DE
影响因子：
5.3
作者：
ANDERSON, RF;BACON, MP;BREWER, PG
通讯作者：
BREWER, PG
影响因子：
5.3
作者：
BARNES, CE;COCHRAN, JK
通讯作者：
COCHRAN, JK