Black carbon radiative effects highly sensitive to emitted particle size when resolving mixing-state diversity.
Black carbon radiative effects highly sensitive to emitted particle size when resolving mixing-state diversity.
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DOI：
10.1038/s41467-018-05635-1
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发表时间：
2018-08-27
影响因子：
16.6
通讯作者：
Mahowald NM
中科院分区：
文献类型：
--
作者：
Matsui H;Hamilton DS;Mahowald NM
后工业时代大气中黑碳（BC）的增加对地球气候的变暖有很大但不确定的贡献。颗粒尺寸和混合状态决定了BC的太阳能吸收效率，也强烈影响BC的去除效果，但它们具有很大的不确定性。在这里，我们使用一个多混合状态的全球气溶胶微物理模型，并表明，由于目前的排放尺寸分布的不确定性，目前的BC直接辐射效应的灵敏度（范围）放大5-7倍（0.18-0.42 W m−2）时，BC混合状态的多样性是充分解决。这种放大是由BC的寿命、核心吸收和吸收增强效应引起的，在单混合态模型中，BC的可变性被低估了45-70%。我们证明，减少排放量的大小分布的不确定性，以及它们如何在未来的变化，同时也解决建模BC混合状态的多样性，现在是必不可少的，当评估BC辐射效应和BC缓解对未来温度变化的有效性。黑碳对地球气候变暖有很大但不确定的贡献。在这里，松井等人表明，黑碳混合状态及其与气溶胶粒径分布的相互作用是准确估计黑碳辐射效应所必需的。
Post-industrial increases in atmospheric black carbon (BC) have a large but uncertain warming contribution to Earth’s climate. Particle size and mixing state determine the solar absorption efficiency of BC and also strongly influence how effectively BC is removed, but they have large uncertainties. Here we use a multiple-mixing-state global aerosol microphysics model and show that the sensitivity (range) of present-day BC direct radiative effect, due to current uncertainties in emission size distributions, is amplified 5–7 times (0.18–0.42 W m−2) when the diversity in BC mixing state is sufficiently resolved. This amplification is caused by the lifetime, core absorption, and absorption enhancement effects of BC, whose variability is underestimated by 45–70% in a single-mixing-state model representation. We demonstrate that reducing uncertainties in emission size distributions and how they change in the future, while also resolving modeled BC mixing state diversity, is now essential when evaluating BC radiative effects and the effectiveness of BC mitigation on future temperature changes. Black carbon has a large but uncertain warming contribution to Earth’s climate. Here Matsui et al. show that black carbon mixing state and its interaction with aerosol size distribution are required for accurately estimating the radiative effect of black carbon.
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影响因子：
56.9
作者：
Cappa, Christopher D.;Onasch, Timothy B.;Zaveri, Rahul A.
通讯作者：
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影响因子：
6.3
作者：
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通讯作者：
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DOI：
10.1073/pnas.2237157100
发表时间：
2004-01-13
影响因子：
11.1
作者：
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通讯作者：
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影响因子：
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影响因子：
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