Plant Regrowth as a Driver of Recent Enhancement of Terrestrial CO2 Uptake
Plant Regrowth as a Driver of Recent Enhancement of Terrestrial CO2 Uptake
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DOI：
10.1029/2018gl077633
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发表时间：
2018-05-28
影响因子：
5.2
通讯作者：
Wiltshire, Andy
中科院分区：
文献类型：
--
作者：
Kondo, Masayuki;Ichii, Kazuhito;Wiltshire, Andy
2000年代陆地二氧化碳吸收强度的增加归因于大气二氧化碳浓度上升对光合作用（二氧化碳施肥）的刺激作用。使用陆地生物圈模型，我们表明，二氧化碳吸收的增加不仅是由于二氧化碳施肥引起的，而且还因为植物再生而增加了吸收（与 1960 年代至 1990 年代相比，2000 年代二氧化碳吸收量每年增加 0.330 +/- 0.10 PgC），其影响在北美东部、东南欧和温带东南部最为明显欧亚大陆。我们的分析表明，北美和欧洲的生态系统自20世纪60年代以来已经通过再生形成了目前的生产状态，而欧亚温带地区的生态系统仍处于1980年代至1990年代积极造林后的再生阶段。由于二氧化碳施肥模型表征的强度仍存在争议，植物再生可能比本研究表明的更具有固碳潜力。
The increasing strength of land CO2 uptake in the 2000s has been attributed to a stimulating effect of rising atmospheric CO2 on photosynthesis (CO2 fertilization). Using terrestrial biosphere models, we show that enhanced CO2 uptake is induced not only by CO2 fertilization but also an increasing uptake by plant regrowth (accounting for 0.330 +/- 0.10 PgC/year increase of CO2 uptake in the 2000s compared with the 1960s-1990s) with its effect most pronounced in eastern North America, southern-eastern Europe, and southeastern temperate Eurasia. Our analysis indicates that ecosystems in North America and Europe have established the current productive state through regrowth since the 1960s, and those in temperate Eurasia are still in a stage from regrowth following active afforestation in the 1980s-1990s. As the strength of model representation of CO2 fertilization is still in debate, plant regrowth might have a greater potential to sequester carbon than indicated by this study.