Small global effect on terrestrial net primary production due to increased fossil fuel aerosol emissions from East Asia since the turn of the century.
Small global effect on terrestrial net primary production due to increased fossil fuel aerosol emissions from East Asia since the turn of the century.
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DOI：
10.1002/2016gl068965
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发表时间：
2016-08-16
影响因子：
5.2
通讯作者：
Buermann, W.
中科院分区：
文献类型：
--
作者：
O'Sullivan, M.;Rap, A.;Reddington, C. L.;Spracklen, D. V.;Gloor, M.;Buermann, W.
关键词：
自本世纪开始以来，在化石燃料燃烧产生的碳排放不断增加的时候，全球陆地碳汇也在增加。在这里，我们测试的假设，增加大气气溶胶从化石燃料燃烧增强漫射光部分和植物碳吸收的效率。使用模型的组合，我们估计，在全球范围内的光制度的变化，从化石燃料气溶胶排放只有一个小的负面影响，在1998年至2010年期间，陆地净初级生产力的增加。因此，东亚地区化石燃料气溶胶排放和植物碳吸收的大幅增加被欧洲和北美的相反趋势有效地抵消了。这表明，如果最近陆地碳汇的增加与化石燃料排放有因果关系，则不太可能通过气溶胶的影响，而是由于氮沉积或氮碳相互作用等其他因素。东亚地区FF气溶胶排放的增加对区域植物碳吸收的增加有很大的贡献。全球影响很小，因为东亚地区FF气溶胶和NPP的增加被欧洲和北美相反的趋势抵消了。因此，东亚地区FF气溶胶的增加可能不是解释陆地碳汇同步增加的机制。
The global terrestrial carbon sink has increased since the start of this century at a time of growing carbon emissions from fossil fuel burning. Here we test the hypothesis that increases in atmospheric aerosols from fossil fuel burning enhanced the diffuse light fraction and the efficiency of plant carbon uptake. Using a combination of models, we estimate that at global scale changes in light regimes from fossil fuel aerosol emissions had only a small negative effect on the increase in terrestrial net primary production over the period 1998–2010. Hereby, the substantial increases in fossil fuel aerosol emissions and plant carbon uptake over East Asia were effectively canceled by opposing trends across Europe and North America. This suggests that if the recent increase in the land carbon sink would be causally linked to fossil fuel emissions, it is unlikely via the effect of aerosols but due to other factors such as nitrogen deposition or nitrogen‐carbon interactions. Increase in FF aerosol emission over East Asia contributes substantially to regional increase in plant carbon uptake The global impact is small since increases in FF aerosols and NPP in East Asia were canceled by opposing trends in Europe and North America Thus, the increase in FF aerosols over East Asia may not act as a mechanism that would explain coincident increase in land carbon sink