Reemergence of Anthropogenic Carbon Into the Ocean's Mixed Layer Strongly Amplifies Transient Climate Sensitivity

Reemergence of Anthropogenic Carbon Into the Ocean's Mixed Layer Strongly Amplifies Transient Climate Sensitivity
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人为碳重新进入海洋混合层强烈放大了瞬态气候敏感性

DOI:
10.1029/2020gl089275
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发表时间:
2020
影响因子:
5.2
通讯作者:
Rodgers K
Rodgers K
中科院分区:
地球科学1区
文献类型:
--
作者:
Rodgers K

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一个积极的海洋化学-气候反馈最初由Revelle和Suess提出(1957,https://doi.org/10.3402/tellusa.v9i1.9075),其中人为碳进入海洋的入侵通量通过减少表层海水的缓冲能力来抑制未来海洋CO2吸收。在这里,我们使用海洋环流-碳循环模型来确定人为碳重新出现到海洋混合层对大气中累积的空气传播的CO2分数的影响的上限。我们发现,根据RCP8.5排放途径(稳定循环),累积的空气中的CO2分数有7倍减少到2100年时,地表海水的CO2缓冲能力保持在工业化前的水平。我们的研究结果表明,人为碳重新出现到混合层的CO2缓冲能力的影响放大了地球系统的瞬态气候敏感性。
A positive marine chemistry‐climate feedback was originally proposed by Revelle and Suess (1957, https://doi.org/10.3402/tellusa.v9i1.9075), whereby the invasion flux of anthropogenic carbon into the ocean serves to inhibit future marine CO2uptake through reductions to the buffering capacity of surface seawater. Here we use an ocean circulation‐carbon cycle model to identify an upper limit on the impact of reemergence of anthropogenic carbon into the ocean's mixed layer on the cumulative airborne fraction of CO2in the atmosphere. We find under an RCP8.5 emissions pathway (with steady circulation) that the cumulative airborne fraction of CO2has a sevenfold reduction by 2100 when the CO2buffering capacity of surface seawater is maintained at preindustrial levels. Our results indicate that the effect of reemergence of anthropogenic carbon into the mixed layer on the buffering capacity of CO2amplifies the transient climate sensitivity of the Earth system.
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发表时间: 2019
影响因子: 9.5
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