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首页> 外文期刊>Geophysical Research Letters >An off-line 3D model of anthropogenic CO2 uptake by the oceans
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An off-line 3D model of anthropogenic CO2 uptake by the oceans

机译:海洋人为吸收二氧化碳的离线3D模型

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A key unanswered question in global climate research is the extent to which the oceans absorb and redistribute anthropogenic CO2 (Delta DICant). We apply an offline ocean carbon cycle model, one that uses atmospheric CO2 concentrations and simplified ocean ventilation estimates. We estimate ocean ventilation by introducing the full age distributions of water masses obtained from a global ocean circulation model. The two model cases we use are known to respectively underestimate and overestimate observed ventilation rates, thereby providing upper and lower bounds on CO2 uptake. The error in determining Delta DICant is reduced significantly by minimising the number of tunable parameters. The development of the oceanic Delta DICant inventory is resolved from the beginning of industrialisation to the present time. According to the model, 177Gt anthropogenic carbon have been locked up in the oceans by 1999, corresponding to an annual uptake rate of 3.9GtC*a(-1) during 1999. Uncertainties in our estimated oceanic CO2 uptake are discussed. [References: 26]
机译:全球气候研究中一个关键的未解决问题是海洋在多大程度上吸收和重新分配人为二氧化碳(Delta DICant)。我们应用了离线海洋碳循环模型,该模型使用大气中的二氧化碳浓度和简化的海洋通风估算。我们通过介绍从全球海洋环流模型获得的水团的整个年龄分布来估计海洋通风。已知我们使用的两个模型案例分别低估和高估了观察到的通气率,从而提供了二氧化碳吸收的上限和下限。通过最小化可调参数的数量,可以大大减少确定Delta DICant的错误。从工业化开始到现在,解决了大洋洲Delta DICant库存的发展。根据该模型,到1999年,海洋中已经锁定了177Gt人为碳,相当于1999年期间的3.9GtC * a(-1)的年吸收率。讨论了我们估计的海洋CO2吸收的不确定性。 [参考:26]

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