Tjiputra Jerry F, Couespel Damien, Sanders Richard
NORCE Norwegian Research Centre AS, Bjerknes Centre for Climate Research, Bergen, Norway.
Nat Commun. 2025 Mar 5;16(1):2206. doi: 10.1038/s41467-025-57371-y.
The ocean ecosystem is a vital component of the global carbon cycle, storing enough carbon to keep atmospheric CO considerably lower than it would otherwise be. However, this conception is based on simple models, neglecting the coupled land-ocean feedback. Using an interactive Earth system model, we show that the role ocean biology plays in controlling atmospheric CO is more complex than previously thought. Atmospheric CO in a new equilibrium state after the biological pump is shut down increases by more than 50% (163 ppm), lower than expected as approximately half the carbon lost from the ocean is adsorbed by the land. The abiotic ocean is less capable of taking up anthropogenic carbon due to the warmer climate, an absent biological surface pCO deficit and a higher Revelle factor. Prioritizing research on and preserving marine ecosystem functioning would be crucial to mitigate climate change and the risks associated with it.
海洋生态系统是全球碳循环的重要组成部分，储存了足够的碳，使大气中的二氧化碳浓度远低于没有它时的水平。然而，这一概念基于简单模型，忽略了陆地 - 海洋的耦合反馈。使用一个交互式地球系统模型，我们表明海洋生物学在控制大气二氧化碳方面所起的作用比以前认为的更为复杂。生物泵关闭后，新平衡状态下的大气二氧化碳增加超过50%（163 ppm），低于预期，因为海洋中损失的碳约有一半被陆地吸收。由于气候变暖、缺乏生物表面pCO亏缺以及更高的瑞韦尔因子，非生物海洋吸收人为碳的能力较弱。优先开展关于海洋生态系统功能的研究并加以保护，对于缓解气候变化及其相关风险至关重要。
