Anthropogenic combustion iron as a complex climate forcer.
Anthropogenic combustion iron as a complex climate forcer.
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DOI：
10.1038/s41467-018-03997-0
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发表时间：
2018-04-23
影响因子：
16.6
通讯作者：
Flanner MG
中科院分区：
文献类型：
--
作者：
Matsui H;Mahowald NM;Moteki N;Hamilton DS;Ohata S;Yoshida A;Koike M;Scanza RA;Flanner MG
大气铁通过可溶性铁向海洋的沉积调节海洋地球化学，从而影响全球碳循环。人类（化石燃料）燃烧排放的铁是可溶性铁的来源，目前认为其不如其他可溶性铁来源（如矿物粉尘和生物质燃烧）重要。在这里，我们表明，人为燃烧铁的大气负担是8倍，比以前的估计，将最近的测量人为磁铁矿到全球气溶胶模型。这一新的估计将可溶性铁向南大洋（30-90 °S）的总沉积通量增加了52%，人为燃烧铁的贡献大于灰尘和生物质燃烧源。据估计，全球范围内，人为磁铁矿的直接辐射强迫为0.021 W m−2，东亚地区为0.22 W m−2。我们的研究结果表明，人为燃烧铁是一个更大，更复杂的气候强迫比以前认为的，因此在地球系统中起着关键作用。作为可溶性铁的来源，人为燃烧铁被认为不如天然来源重要。在这里，作者将联合收割机新的测量结果与全球气溶胶模型相结合，并显示人为燃烧铁的大气负担是以前估计的8倍。
Atmospheric iron affects the global carbon cycle by modulating ocean biogeochemistry through the deposition of soluble iron to the ocean. Iron emitted by anthropogenic (fossil fuel) combustion is a source of soluble iron that is currently considered less important than other soluble iron sources, such as mineral dust and biomass burning. Here we show that the atmospheric burden of anthropogenic combustion iron is 8 times greater than previous estimates by incorporating recent measurements of anthropogenic magnetite into a global aerosol model. This new estimation increases the total deposition flux of soluble iron to southern oceans (30–90 °S) by 52%, with a larger contribution of anthropogenic combustion iron than dust and biomass burning sources. The direct radiative forcing of anthropogenic magnetite is estimated to be 0.021 W m−2 globally and 0.22 W m−2 over East Asia. Our results demonstrate that anthropogenic combustion iron is a larger and more complex climate forcer than previously thought, and therefore plays a key role in the Earth system. As a source of soluble iron, anthropogenic combustion iron is considered less important than natural sources. Here, the authors combine new measurements with a global aerosol model and show the atmospheric burden of anthropogenic combustion iron to be 8 times greater than previous estimates.
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影响因子：
64.8
作者：
DEBAAR, HJW;DEJONG, JTM;SMETACEK, V
通讯作者：
SMETACEK, V
影响因子：
64.8
作者：
Boyd, PW;Watson, AJ;Zeldis, J
通讯作者：
Zeldis, J
影响因子：
4.4
作者：
Flanner, Mark G.;Zender, Charles S.;Rasch, Philip J.
通讯作者：
Rasch, Philip J.
影响因子：
4.4
作者：
Abdul-Razzak, H;Ghan, SJ
通讯作者：
Ghan, SJ
影响因子：
5.2
作者：
Baker, A. R.;Jickells, T. D.
通讯作者：
Jickells, T. D.