Biogeosciences The role of ocean transport in the uptake of anthropogenic CO 2
Biogeosciences The role of ocean transport in the uptake of anthropogenic CO 2
复制标题
生物地球科学 海洋运输在人为 CO 2 吸收中的作用
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
A. Yool
中科院分区：
文献类型：
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作者：
L. Cao;M. Eby;A. Ridgwell;K. Caldeira;D. Archer;A. Ishida;F. Joos;K. Matsumoto;U. Mikolajewicz;A. Mouchet;J. Orr;G. Plattner;R. Schlitzer;K. Tokos;I. Totterdell;T. Tschumi;Y. Yamanaka;A. Yool
我们比较了模拟的海洋碳吸收响应脉冲CO2排放使用一套全球海洋模型和地球系统模型。在590 Pg C的CO2脉冲排放（相当于大气CO2从278 ppm瞬间加倍到556 ppm）下，排放的CO2中被海洋吸收的部分在排放脉冲后30年、100年和1000年分别为37 ± 8%、56± 10%和81±4%（模式平均值±2σ）。在所有模型中，模拟的从几十年到大约世纪的时间尺度上的脉冲CO2的海洋吸收与模拟的当今氯氟烃（CFCs）和CO2的吸收密切相关，而从世纪到一千年的海洋吸收的脉冲CO2的量与模拟的南太平洋和太平洋深海的放射性碳密切相关。然而，如果将分析限制在能够在不确定性范围内重现观测结果的模型上，相关性通常要弱得多。表面速率对应于：L. Cao（longcao@stanford.edu）从瞬时倍增CO2模拟中确定了各个模式的CO2向深海的输运，并利用它们计算了海洋对1000和5000 PgC不同大小脉冲CO2排放的响应。将这些结果与考虑气候-海洋碳循环耦合和不考虑气候-海洋碳循环耦合的若干模式模拟的海洋吸收CO2的结果进行了比较，结果表明，模式间不同的海洋输运速率对海洋吸收人为CO2的影响程度与单一模式中气候-碳循环反馈的影响程度相似，强调海洋运输在吸收人为二氧化碳方面的重要作用。
We compare modeled oceanic carbon uptake in response to pulse CO 2 emissions using a suite of global ocean models and Earth system models. In response to a CO 2 pulse emission of 590 Pg C (corresponding to an instantaneous doubling of atmospheric CO 2 from 278 to 556 ppm), the fraction of CO2 emitted that is absorbed by the ocean is: 37 ±8%, 56±10%, and 81±4% (model mean±2σ) in year 30, 100, and 1000 after the emission pulse, respectively. Modeled oceanic uptake of pulse CO 2 on timescales from decades to about a century is strongly correlated with simulated presentday uptake of chlorofluorocarbons (CFCs) and CO 2 across all models, while the amount of pulse CO 2 absorbed by the ocean from a century to a millennium is strongly correlated with modeled radiocarbon in the deep Southern and Pacific Ocean. However, restricting the analysis to models that are capable of reproducing observations within uncertainty, the correlation is generally much weaker. The rates of surfaceCorrespondence to: L. Cao (longcao@stanford.edu) to-deep ocean transport are determined for individual models from the instantaneous doubling CO 2 simulations, and they are used to calculate oceanic CO 2 uptake in response to pulse CO2 emissions of different sizes pulses of 1000 and 5000 Pg C. These results are compared with simulated oceanic uptake of CO2 by a number of models simulations with the coupling of climate-ocean carbon cycle and without it. This comparison demonstrates that the impact of different ocean transport rates across models on oceanic uptake of anthropogenic CO 2 is of similar magnitude as that of climate-carbon cycle feedbacks in a single model, emphasizing the important role of ocean transport in the uptake of anthropogenic CO 2.