Imprints of Atlantic Multidecadal Oscillation on pantropical seawater pH inferred from coral δ11B records

IF 3.2 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews Pub Date : 2024-10-17 DOI:10.1016/j.quascirev.2024.109003

Huiling Kang , Xuefei Chen , Wenfeng Deng , Tianyu Chen , Guanqiang Cai , Gangjian Wei

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引用次数: 0

Abstract

Understanding natural variability in seawater pH (pH_sw) is crucial for predicting future ocean acidification. Coral boron isotopes (δ¹¹B) offer an alternative method to extend pH_sw records back centuries, shedding light on how pH_sw varies over time. This study compiles both new and existing coral δ¹¹B records from pantropical oceans to investigate multidecadal pH_sw variability and its connection to climate variability. A notable finding is the pronounced influence of the Atlantic Multidecadal Oscillation (AMO) on pantropical coral δ¹¹B-pH variations. This is primarily interpreted as the effects of AMO-associated climate changes on reef pH_sw, rather than influencing coral physiological processes related to calcifying fluid pH. Key factors like wind speeds and hydrological variability related to Intertropical Convergence Zone (ITCZ) shifts are identified as potential drivers of the AMO's impact on pH_sw. This study thus provides valuable insights into the broader effects of the Atlantic climate on pantropical seawater CO₂ system.

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根据珊瑚δ11B 记录推断大西洋十年涛动对泛热带海水 pH 值的影响

了解海水pH值（pHsw）的自然变化对于预测未来海洋酸化至关重要。珊瑚硼同位素（δ11B）提供了另一种方法，可将pHsw记录追溯到几个世纪以前，从而揭示pHsw是如何随时间变化的。本研究汇编了来自泛热带海洋的新的和现有的珊瑚δ11B记录，以研究多年代的pHsw变化及其与气候变异的联系。一个值得注意的发现是大西洋多年代涛动（AMO）对泛热带珊瑚δ11B-pH 变化的明显影响。这主要被解释为与 AMO 相关的气候变化对珊瑚礁 pHsw 的影响，而不是对与钙化液 pH 值相关的珊瑚生理过程的影响。与热带辐合带（ITCZ）移动相关的风速和水文变化等关键因素被认为是导致 AMO 对 pHsw 产生影响的潜在驱动因素。因此，这项研究为了解大西洋气候对泛热带海洋海水二氧化碳系统的广泛影响提供了宝贵的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Quaternary Science Reviews 地学-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

388

审稿时长

3 months

期刊介绍： Quaternary Science Reviews caters for all aspects of Quaternary science, and includes, for example, geology, geomorphology, geography, archaeology, soil science, palaeobotany, palaeontology, palaeoclimatology and the full range of applicable dating methods. The dividing line between what constitutes the review paper and one which contains new original data is not easy to establish, so QSR also publishes papers with new data especially if these perform a review function. All the Quaternary sciences are changing rapidly and subject to re-evaluation as the pace of discovery quickens; thus the diverse but comprehensive role of Quaternary Science Reviews keeps readers abreast of the wider issues relating to new developments in the field.