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首页> 外文期刊>Geophysical Research Letters >An improved estimate of the isotopic air-sea disequilibrium of CO2: Implications for the oceanic uptake of anthropogenic CO2
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An improved estimate of the isotopic air-sea disequilibrium of CO2: Implications for the oceanic uptake of anthropogenic CO2

机译:二氧化碳同位素海海不平衡的改进估计:对海洋人为吸收二氧化碳的影响

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摘要

We reevaluate the isotopic air-sea disequilibrium of CO2 on the basis of a new high-quality global data set of surface observations of the reduced isotopic ratio (delta C-13) of dissolved inorganic carbon (DIC). We find a global mean isotopic air-sea disequilibrium of 0.62+/-0.10 permil for 1990. Inserting our estimate into an anthropogenic C-13 budget for the period from 1985 to 1995 yields an oceanic uptake of 1.5+/-0.9 Pg C yr(-1), within the range of most other estimates. The large uncertainty of this estimate could be reduced with (i) better characterization of the surface ocean variability in delta C-13, (ii) improved knowledge of the air-sea gas exchange coefficient, and (iii) a significant reduction in the uncertainty associated with the air-land biosphere disequilibrium. [References: 29]
机译:我们基于溶解无机碳(DIC)的降低的同位素比(δC-13)的表面观测的新的高质量全球数据集,重新评估了CO2的同位素海-海不平衡。我们发现1990年全球平均同位素空气-海洋不平衡度为0.62 +/- 0.10 permil。将我们的估算值插入到1985年至1995年的人为C-13预算中,将产生1.5 +/- 0.9 Pg Cyr的海洋吸收(-1),在大多数其他估算值的范围内。可以通过(i)更好地表征三角洲C-13中的海洋表面变化性,(ii)更好地了解空气-海洋气体交换系数以及(iii)显着降低不确定性来减少此估计的较大不确定性与空地生物圈失衡有关。 [参考:29]

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