Deep Ocean Circulation Governs Sedimentary CaCO3 Accumulation in the Northeast Pacific Ocean
Deep Ocean Circulation Governs Sedimentary CaCO3 Accumulation in the Northeast Pacific Ocean
复制标题
深海环流控制东北太平洋沉积物 CaCO3 积累
DOI：
10.1029/2022jc018922
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
J. Tjiputra
中科院分区：
文献类型：
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作者：
J. Xia;Y. Luo;J. Tjiputra
经向翻转环流影响深海碳库、全球碳循环以及世纪至千年时间尺度的气候变化。然而，由于地形的复杂性导致深海通风的几何形状复杂，深海环流对沉积碳酸盐堆积以及北太平洋深海碳酸盐系统的影响难以量化。在本研究中，我们重新定量分析了东北太平洋深海沉积物碳酸钙含量（wtCaCO3%）的分布模式。我们的结果与来自西北太平洋的数据相结合表明，尽管活跃地质过程的碎屑对地形结构造成了非碳酸盐稀释作用，但深海环流在阐明北太平洋沉积 CaCO3 分布的盆地尺度特征方面发挥着关键作用。此外，危地马拉和巴拿马盆地的碳酸盐溶解增强，受深海流速较高的控制，影响该地区沉积物wtCaCO3%的深度剖面。这些发现提出了一种根据沉积物中 wtCaCO3% 记录重建东北太平洋海洋环流和碳循环过去变化的新途径。
The meridional overturning circulation influences the deep‐sea carbon reservoir, global carbon cycle, and climate change on century to millennium time scales. However, the influence of deep‐sea circulation on sedimentary carbonate accumulation and thus deep‐sea carbonate system in the North Pacific Ocean is difficult to quantify owing to the complicated geometry of deep ocean ventilation attributed to its topographic complexity. In this study, we reanalyzed the distribution patterns of sedimentary calcium carbonate contents (wtCaCO3%) in the deep Northeast Pacific in a quantitative manner. Our results in conjunction with data from the Northwest Pacific Ocean, suggest that the deep ocean circulation plays a critical role in elucidating the basin‐scale features of sedimentary CaCO3 distribution in the North Pacific Ocean, despite elevated non‐carbonate dilution exerted by detritus from active geological processes on the topographic structure. Moreover, enhanced carbonate dissolution in the Guatemala and Panama Basins, controlled by higher flow rates of deep currents, influences the depth‐profiles of sedimentary wtCaCO3% in that region. These findings suggest a novel avenue to reconstruct past changes in ocean circulation and carbon cycling in the Northeast Pacific Ocean based on the wtCaCO3% records in sediments.
影响因子：
18.3
作者：
W. Gray;J. Rae;Robert C.J. Wills;A. Shevenell;B. Taylor;A. Burke;G. Foster;C. Lear
通讯作者：
W. Gray;J. Rae;Robert C.J. Wills;A. Shevenell;B. Taylor;A. Burke;G. Foster;C. Lear