在2000-2022年期间限制海洋CO2沉没的趋势
Nicolas Mayot1, Erik T Buitenhuis2, Rebecca M Wright2
1School of Environmental Sciences, University of East Anglia, Norwich, UK. n.mayot@uea.ac.uk.
Nature communications
|September 28, 2024
概括
海洋吸收大量的二氧化碳 (CO2),但对其二氧化碳沉降趋势的估计有所不同. 一种新的混合方法调和了模型和观测,揭示了受限制的2000-2022年海洋二氧化碳沉降趋势.
科学领域:
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
- 碳循环研究 碳循环研究
背景情况:
- 海洋是大气中的二氧化碳 (CO2) 的主要沉积点.
- 在基于观察和基于模型的估计中存在差异,2000-2022年海洋二氧化碳沉降趋势的估计.
- 了解海洋的二氧化碳沉降对于减缓气候变化至关重要.
研究的目的:
- 为了解决海洋二氧化碳沉降趋势估计中的差异.
- 开发一种混合方法,将观察数据和基于过程的模型结合起来.
- 为了更准确地估计2000-2022年海洋二氧化碳沉降趋势.
主要方法:
- 开发了一种混合方法来估计海洋的二氧化碳沉降.
- 保持已知的海洋学过程的一致性.
- 使用观测数据的受限模型结果.
主要成果:
- 混合方法重现了海洋二氧化碳沉降的十年变化,包括1990年代的停滞和2000年代的振兴.
- 基于过程的模型被发现低估了十年变化的幅度.
- 发现基于观察的产品高估了2010年代的趋势.
结论:
- 2000-2022年海洋二氧化碳沉降趋势被限制在0.42 ± 0.06 Pg C yr-1十年-1.
- 据推断,土地的二氧化碳总吸收量为0.28 ± 0.13 Pg C yr-1 十年-1.
- 这项研究提供了对海洋和陆地碳捕获的更可靠的估计.
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