海洋运输和垂直混合将格陵兰的大藻与深海的碳汇连接起来
Daniel F Carlson1, Nobuhiro Suzuki2, Ruben Carrasco3
1Optical Oceanography, Institute of Carbon Cycles, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502, Geesthacht, Germany; Radar Hydrography, Institute of Coastal Ocean Dynamics, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502, Geesthacht, Germany; Small-Scale Physics and Turbulence, Institute of Coastal Ocean Dynamics, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502, Geesthacht, Germany; Marine Observations Department, Leibniz Institute for Baltic Sea Research Warnemünde, Seestr. 15, 18119, Rostock, Germany.
The Science of the total environment
|December 26, 2025
概括
来自格陵兰岛的浮动大藻类可以被运送到海上并沉没,这有助于深海碳捕获. 这项研究验证了估计宏藻对深海碳出口的关键假设.
科学领域:
- 海洋生态海洋生态学
- 海洋学 海洋学 海洋学
- 生物地质化学循环的过程
背景情况:
- 大藻碳出口的估计依赖于关于横向运输和垂直沉入深海的假设.
- 很少有研究在经验上解决了从沿海到离岸环境的宏观藻类运输途径.
- 格陵兰岛海岸和离岸地区之间的海洋联系是已知的,但宏观藻类出口动态尚不清楚.
研究的目的:
- 测试关于格陵兰西南部的大藻横向表面运输和垂直出口的假设.
- 量化大藻类在大陆架和拉布拉多海上的居住时间和运输路径.
- 研究促进大藻碳出口到深海的机制.
主要方法:
- 从1380张Sentinel-2卫星图像中分析了7973个藻斑块.
- 利用305个表面漂流者轨迹来量化居住时间和运输.
- 采用拉格朗的粒子追踪模型 (LPTM) 来追踪补丁的起源和路径.
- 进行大型模拟,探索垂直出口机制,包括深度对流.
主要成果:
- 在格陵兰岛西南海岸和拉布拉多海上发现了大量漂浮大藻类的存在.
- 平均表面停留时间为12.1天 (南南格陵兰岛架) 和63.6天 (拉布拉多海).
- 流浪者数据表明,藻在架过境期间可以保持完整,使得海上沉没成为可能.
- 深度对流被确定为一种可以将浮力大藻类运送到深度的机制,导致气囊爆裂和加速沉降.
结论:
- 格陵兰岛的宏观藻类生态系统可以为相邻的架子和开放的海洋水槽提供破坏性碳.
- 这项研究验证了宏藻对海洋碳捕获的贡献潜力.
- 强调在宏观藻类碳出口估计中经验测试运输假设的重要性.
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