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Updated: May 10, 2025

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拉格朗的视角揭示了海洋的碳和氧预算
Alberto Baudena1,2, Rémi Laxenaire3,4, Camille Catalano1
1Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-Mer, France.
概括
海洋的碳捕获对气候变化至关重要. 一项新的研究揭示了"核潜水"作为Benguela上游系统中一个重要的碳出口机制.
科学领域:
- 海洋学 海洋学 海洋学
- 生物地质化学生物地质化学
- 气候科学 气候科学
背景情况:
- 准确量化海洋碳捕获对于了解气候变化至关重要.
- 目前对引力碳出口到中层层区域的测量往往与观察到的碳需求或氧气消耗不一致,这表明潜在的未测量的碳出口途径.
研究的目的:
- 在Benguela上游系统的旋风旋中调查和量化碳出口机制.
- 为了调和碳供应,需求和氧气消耗之间的差异,在中区.
主要方法:
- 在气旋中部署一个生物地球化学Argo漂浮器5个月.
- 利用带有水下视觉概况器6的粒子图像进行垂直碳出口和呼吸的准拉格朗的估计.
- 进行了灵敏度分析,以评估与碳供需相对应的氧气消耗率.
主要成果:
- 确定了一种垂直颗粒碳出口的新型机制,称为"全核心潜水".
- 灵敏度分析表明,在特定假设下,氧气消耗率可以平衡碳供需.
- 据估计,与生物引力相比,这种潜水在旋内的450米深度出口约25%至50%的总碳.
结论:
- "全核心潜水"是一个重要的,以前被低估的碳出口途径.
- 这种机制有助于平衡所研究的中的碳和氧预算.
- 这些发现强调了在全球海洋碳捕获模型中考虑动态的重要性.
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