中国海洋大学甘波澜团队揭示中尺度涡旋增强了海洋对二氧化碳的吸收。相关论文于2025年6月13日发表在《科学进展》杂志上。

海洋中尺度涡旋在调节碳通量和气候变化方面发挥着至关重要但尚未得到充分探索的作用。虽然它们重新分配热量、盐、营养物质和其他示踪剂，但它们对二氧化碳吸收的影响仍不确定。使用基于观测的机器学习来估计数千个涡流在整个生命周期内的二氧化碳通量，研究组发现反气旋涡流平均大大增加了二氧化碳的吸收，而气旋涡流则略微减少了它。这种不对称性导致黑潮延伸和墨西哥湾流这两个主要碳封存区域的二氧化碳吸收总体净增加分别为9.98±2.28和13.82±9.94%。 

这种增强吸收的主要驱动力是反气旋涡旋中溶解的无机碳的向下泵送。反气旋和气旋涡旋之间的不对称生物反应导致了整体涡旋引起的二氧化碳通量不平衡。这一发现表明，由于当前观测中涡流的纳入不足，海洋固碳能力可能被低估，强调了在涡流丰富、采样不足的地区扩大监测的必要性。

附：英文原文

Title: Oceanic uptake of CO2 enhanced by mesoscale eddies

Author: Xueyin Li, Bolan Gan, Zhengguang Zhang, Zhimian Cao, Bo Qiu, Zhaohui Chen, Lixin Wu

Issue&Volume: 2025-06-13

Abstract: Oceanic mesoscale eddies play a crucial but underexplored role in regulating carbon fluxes and climate change. While they redistribute heat, salt, nutrients, and other tracers, their effects on CO2 uptake remain uncertain. Using observation-based machine learning to estimate CO2 fluxes throughout the lifetimes of thousands of eddies, we show that anticyclonic eddies substantially enhance CO2 uptake on average, while cyclonic eddies marginally diminish it. This asymmetry yields an overall net increase in CO2 absorption by 9.98 ± 2.28 and 13.82 ± 9.94% in the Kuroshio Extension and Gulf Stream, respectively, major carbon sequestration regions. The primary driver of this enhanced uptake is the downward pumping of dissolved inorganic carbon within anticyclonic eddies. Asymmetric biological responses between anticyclonic and cyclonic eddies contribute to the overall eddy-induced CO2 flux imbalance. The finding suggests a potential underestimation of the ocean’s capacity for carbon sequestration because of insufficient incorporation of eddies in current observations, emphasizing the need for expanded monitoring in eddy-rich, undersampled regions.

DOI: adt4195

Source: https://www.science.org/doi/10.1126/sciadv.adt4195