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Climate change drives rapid decadal acidification in the Arctic Ocean from 1994 to 2020
Science ( IF 56.9 ) Pub Date : 2022-09-29 , DOI: 10.1126/science.abo0383
Di Qi 1, 2, 3 , Zhangxian Ouyang 4 , Liqi Chen 1, 2 , Yingxu Wu 1 , Ruibo Lei 5 , Baoshan Chen 4 , Richard A Feely 6 , Leif G Anderson 7 , Wenli Zhong 8 , Hongmei Lin 2 , Alexander Polukhin 9 , Yixing Zhang 2 , Yongli Zhang 10 , Haibo Bi 3, 11 , Xinyu Lin 2 , Yiming Luo 12 , Yanpei Zhuang 1 , Jianfeng He 5 , Jianfang Chen 13 , Wei-Jun Cai 4
Affiliation  

The Arctic Ocean has experienced rapid warming and sea ice loss in recent decades, becoming the first open-ocean basin to experience widespread aragonite undersaturation [saturation state of aragonite (Ω arag ) < 1]. However, its trend toward long-term ocean acidification and the underlying mechanisms remain undocumented. Here, we report rapid acidification there, with rates three to four times higher than in other ocean basins, and attribute it to changing sea ice coverage on a decadal time scale. Sea ice melt exposes seawater to the atmosphere and promotes rapid uptake of atmospheric carbon dioxide, lowering its alkalinity and buffer capacity and thus leading to sharp declines in pH and Ω arag . We predict a further decrease in pH, particularly at higher latitudes where sea ice retreat is active, whereas Arctic warming may counteract decreases in Ω arag in the future.

中文翻译:

从 1994 年到 2020 年,气候变化推动了北冰洋十年间的快速酸化

近几十年来,北冰洋经历了快速变暖和海冰流失,成为第一个经历广泛文石欠饱和的远洋盆地 [saturation state of aragonite (Ω阿拉格) < 1]。然而,其长期海洋酸化的趋势及其潜在机制仍未被证实。在这里,我们报告了那里的快速酸化,其速率是其他海洋盆地的三到四倍,并将其归因于十年时间尺度上海冰覆盖率的变化。海冰融化使海水暴露在大气中,促进大气中二氧化碳的快速吸收,降低其碱度和缓冲能力,从而导致 pH 值和 Ω 急剧下降阿拉格. 我们预测 pH 值会进一步下降,特别是在海冰退缩活跃的高纬度地区,而北极变暖可能会抵消 Ω 的下降阿拉格在将来。
更新日期:2022-09-29
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