全球状流及其对有机碳循环的影响
Peter J Talling1,2, Sophie Hage3, Megan L Baker1
1Department of Geography, Durham University, Durham, United Kingdom; email: peter.j.talling@durham.ac.uk, megan.l.baker@durham.ac.uk.
Annual review of marine science
|July 24, 2023
概括
海底乱电流有效地埋葬了陆地有机碳,修订了全球碳循环估计. 这些海流在海平面较低时更加活跃,对碳埋藏和大气CO2产生重大影响.
科学领域:
- 地质地质地质地质地质地
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
背景情况:
- 海底乱电流是主要的沉积物堆积器,但它们在全球碳循环中的作用被低估了.
- 以前的假设表明,由于流 (10-44%) 和主要不活跃的系统,陆地有机碳埋葬有限.
- 流在很大程度上被排除在全球碳循环模型之外.
研究的目的:
- 重新评估潜水流在陆地有机碳埋葬中的作用.
- 更新碳质量流和埋葬效率的全球估计.
- 调查流对长期大气二氧化碳和气候的影响.
主要方法:
- 对度电流活动和有机碳埋葬效率的最新研究进行分析.
- 将新数据集成到全球碳循环模型中.
- 在各种海洋环境中对埋葬效率的比较.
主要成果:
- 在各种环境中,通过流埋葬陆地有机碳的效率高 (>60-100%).
- 全球质量流量估计修订为每年62-90万,埋葬效率为31-45%.
- 在过去的海平面低位期间,流活动显著增加,埋葬流量可能被低估.
结论:
- 与以前的看法相反,海底杂电流在陆地有机碳埋葬中发挥着至关重要的作用.
- 经修订的估计强调了对海洋碳捕获的重大贡献.
- 在海平面低期间埋葬的增加表明,它对过去的大气二氧化碳水平和气候调节产生了重大影响.
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