Ocean acidification at the Toarcian Anoxic Event captured by boron isotopes in the lime mud record.

IF 8.9 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Communications Earth & Environment Pub Date : 2025-01-01 Epub Date: 2025-07-05 DOI:10.1038/s43247-025-02510-y
Simone A Kasemann, Tina Klein, Richard A Boyle, Clemens V Ullmann, Martin Aberhan, Anette Meixner, Luís V Duarte, Timothy M Lenton, Veronica Piazza, Rachel A Wood
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引用次数: 0

Abstract

The Toarcian Oceanic Anoxic Event (ca. 183 million years ago) marks a global mass extinction coincident with dramatic changes in climate and ocean circulation, likely driven by large igneous province emplacement. Rapid carbon dioxide release may have induced global warming, widespread ocean deoxygenation, and ocean acidification. To constrain the magnitude of ocean acidification, we present boron isotope data from three different carbonate components, lime mud (micrite), brachiopods, and bivalves, from two marine sections in SW Europe. Only data from micrite shows a temporary decrease in boron isotope composition during the Toarcian Oceanic Anoxic Event, recording an ocean acidification event, which we reproduce using a coupled biogeochemical model. The contrasting stability of boron isotope values shown by bivalves and brachiopods suggests that the investigated taxa may have been able to physiologically buffer changes in ocean pH, and are therefore poor targets for the interrogation of pH changes in Earth history.

石灰泥记录中的硼同位素捕获了托瓦西亚缺氧事件的海洋酸化。
托瓦西亚海洋缺氧事件(约1.83亿年前)标志着全球物种大灭绝,与气候和海洋环流的剧烈变化同时发生,可能是由大型火成岩省就位引起的。二氧化碳的快速释放可能导致了全球变暖、广泛的海洋脱氧和海洋酸化。为了限制海洋酸化的程度,我们从三种不同的碳酸盐成分,石灰泥(泥晶),腕足类和双壳类,在欧洲西南部的两个海洋剖面中获得了硼同位素数据。只有泥晶岩的数据显示,在托瓦西亚海洋缺氧事件期间,硼同位素组成暂时减少,记录了海洋酸化事件,我们使用耦合生物地球化学模型再现了这一事件。双壳类动物和腕足类动物硼同位素值的对比稳定性表明,所调查的分类群可能具有生理缓冲海洋pH变化的能力,因此是地球历史上pH变化的不良目标。
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
Communications Earth & Environment
Communications Earth & Environment Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
8.60
自引率
2.50%
发文量
269
审稿时长
26 weeks
期刊介绍: Communications Earth & Environment is an open access journal from Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the Earth, environmental and planetary sciences. Research papers published by the journal represent significant advances that bring new insight to a specialized area in Earth science, planetary science or environmental science. Communications Earth & Environment has a 2-year impact factor of 7.9 (2022 Journal Citation Reports®). Articles published in the journal in 2022 were downloaded 1,412,858 times. Median time from submission to the first editorial decision is 8 days.
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