Delayed Pantropical Carbon Sink Recovery Due To Asynchronous Post-El Niño Photosynthesis and Respiration Trajectories

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-10-06 DOI:10.1029/2025gl116236

Mousong Wu, Marko Scholze, Jing M. Chen, Yann Kerr, Michael Vossbeck, Nemesio Rodriguez-Fernandez, Thomas Kaminski

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Abstract

Occurring in 2015/16, the strong El Niño has been shown to significantly influence the pantropical carbon fluxes with multiple lines of evidence. However, a comprehensive understanding on the regional and vegetation-specific net ecosystem productivity (NEP) in response to this El Niño event and its recovery trajectories remain unclear. We revisited the controlling factors in the recovery of pantropical NEP from the 2015/16 El Niño until 2020 using a data assimilation framework. We estimated the pantropical net carbon emissions of 0.91 Pg C/yr in 2015 and the mean fraction of recovered area was 0.77 ± 0.07 during 2016–2020. Specifically, we found that temperature and radiation played dominant roles in controlling the recovery of forests' NEP via reducing photosynthesis. Furthermore, we revealed the compound climatic controls on enhanced ecosystem respiration offset NEP recovery over non-forests. These results suggest that the divergence in carbon fluxes regulates the pantropical ecosystem net carbon uptake recovery.

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延迟泛热带碳汇恢复由于异步后el Niño光合作用和呼吸轨迹

发生在2015/16年的强厄尔尼诺Niño已被证明对泛热带碳通量有显著影响，有多种证据。然而，区域和植被特异性净生态系统生产力（NEP）对El Niño事件的响应及其恢复轨迹的全面理解仍不清楚。我们使用数据同化框架重新研究了2015/16年至2020年期间泛热带NEP恢复的控制因素Niño。估算2015年泛热带净碳排放量为0.91 Pg C/yr， 2016-2020年平均恢复面积分数为0.77±0.07。具体来说，我们发现温度和辐射在通过减少光合作用来控制森林NEP的恢复中起主导作用。此外，我们还揭示了复合气候控制对非森林生态系统呼吸增强抵消NEP恢复的影响。这些结果表明，碳通量的差异调节了泛热带生态系统的净碳吸收恢复。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.