Amplified warming accelerates deoxygenation in the Arctic Ocean

IF 29.6 1区地球科学 Q1 ENVIRONMENTAL SCIENCES

Nature Climate Change Pub Date : 2025-07-09 DOI:10.1038/s41558-025-02376-0

Yingxu Wu, Zijia Zheng, Xianyao Chen, Wanqin Zhong, Xu Yuan, Wenli Zhong, Ruibo Lei, Chenglong Li, Yanpei Zhuang, Xiang Gao, Xichen Li, Hongmei Lin, Liqi Chen, Wei-Jun Cai, Di Qi

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Abstract

Overall ocean health depends critically on dissolved oxygen, which is increasingly impacted by global warming. The Arctic and subarctic regions are experiencing exceptionally rapid warming, known as Arctic amplification, yet its impact on oceanic oxygen remains poorly understood. Here we show that inflowing Atlantic Water (AW) drives deoxygenation in the upper eastern Arctic Ocean and the intermediate layers of the western Arctic Ocean at rates from −0.41 ± 0.17 to −0.47 ± 0.07 µmol kg⁻¹ yr⁻¹, six times the global mean. Amplified Arctic warming is the primary driver, significantly reducing oxygen solubility in the Arctic gateway regions. Rapid subduction and circulation of AW further transmit the deoxygenation signal into Arctic deeper layers, greatly threatening marine ecosystems. Our findings highlight the dominant role of warming Atlantic inflow in shaping the Arctic Ocean oxygen dynamics, indicating that ongoing temperature increases will perpetuate deoxygenation trends and underscoring the need for widespread attention.

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变暖加剧加速了北冰洋的脱氧

海洋的整体健康严重依赖溶解氧，而溶解氧正日益受到全球变暖的影响。北极和亚北极地区正在经历异常迅速的变暖，即所谓的北极放大效应，但人们对其对海洋氧气的影响仍知之甚少。在这里，我们发现流入的大西洋水（AW）以−0.41±0.17至−0.47±0.07µmol kg - 1 yr - 1的速率驱动北冰洋东部上部和北冰洋西部中间层的脱氧，是全球平均值的6倍。北极变暖加剧是主要驱动因素，显著降低了北极门户地区的氧溶解度。AW的快速俯冲和环流进一步将脱氧信号传递到北极的深层，极大地威胁了海洋生态系统。我们的研究结果强调了变暖的大西洋流入在形成北冰洋氧动力学方面的主导作用，表明持续的温度升高将使脱氧趋势永恒化，并强调了广泛关注的必要性。

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

Nature Climate Change ENVIRONMENTAL SCIENCES-METEOROLOGY & ATMOSPHERIC SCIENCES

CiteScore

40.30

自引率

1.60%

发文量

267

审稿时长

4-8 weeks

期刊介绍： Nature Climate Change is dedicated to addressing the scientific challenge of understanding Earth's changing climate and its societal implications. As a monthly journal, it publishes significant and cutting-edge research on the nature, causes, and impacts of global climate change, as well as its implications for the economy, policy, and the world at large. The journal publishes original research spanning the natural and social sciences, synthesizing interdisciplinary research to provide a comprehensive understanding of climate change. It upholds the high standards set by all Nature-branded journals, ensuring top-tier original research through a fair and rigorous review process, broad readership access, high standards of copy editing and production, rapid publication, and independence from academic societies and other vested interests. Nature Climate Change serves as a platform for discussion among experts, publishing opinion, analysis, and review articles. It also features Research Highlights to highlight important developments in the field and original reporting from renowned science journalists in the form of feature articles. Topics covered in the journal include adaptation, atmospheric science, ecology, economics, energy, impacts and vulnerability, mitigation, oceanography, policy, sociology, and sustainability, among others.