The effects of hygroscopicity on ice nucleation of fossil fuel combustion aerosols in mixed-phase clouds
The effects of hygroscopicity on ice nucleation of fossil fuel combustion aerosols in mixed-phase clouds
复制标题
吸湿性对混合相云中化石燃料燃烧气溶胶冰核的影响
DOI：
10.5194/acp-13-4339-2013
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发表时间：
2013
影响因子：
6.3
通讯作者：
O. Popovicheva
中科院分区：
文献类型：
--
作者：
Y. Yun;J. Penner;O. Popovicheva
摘要。化石燃料产生的黑碳和有机物（ffBC/OM）通常与硫酸盐一起排放，硫酸盐会覆盖这些颗粒的表面并改变其吸湿性。在卷云温度（约-40°C）下的观测研究表明， soot颗粒的吸湿性可调节其冰核形成能力。在此，我们根据实验室数据对3类soot（疏水、亲水和吸湿）实施了一个方案，并通过使用已发表的沉积/凝结/浸没冻结参数化对观测结果进行外推，明确了它们在混合相温度下作为冰核的能力。新方案导致混合相云中人为强迫发生显著变化。在我们的离线模型研究中，净强迫在0.111到1.059 W m⁻²之间变化，这取决于吸湿soot颗粒的冰核形成能力。新方案下的人为云强迫总量和全天强迫分别为0.06 W m⁻²和-2.45 W m⁻²，但如果允许吸湿soot颗粒成核形成冰粒，可能会更偏向正值（约1.17 W m⁻²）。液态水路径的变化在混合相云中的人为强迫中起主导作用。
Abstract. Fossil fuel black carbon and organic matter (ffBC/OM) are often emitted together with sulfate, which coats the surface of these particles and changes their hygroscopicity. Observational studies at cirrus temperatures (≈−40 °C) show that the hygroscopicity of soot particles can modulate their ice nucleation ability. Here, we implement a scheme for 3 categories of soot (hydrophobic, hydrophilic and hygroscopic) on the basis of laboratory data and specify their ability to act as ice nuclei at mixed-phase temperatures by extrapolating the observations using a published deposition/condensation/immersion freezing parameterization. The new scheme results in significant changes to anthropogenic forcing in mixed-phase clouds. The net forcing in our offline model studies varies from 0.111 to 1.059 W m −2 depending on the ice nucleation capability of hygroscopic soot particles. The total anthropogenic cloud forcing and whole-sky forcing with the new scheme are 0.06 W m −2 and −2.45 W m −2 , respectively, but could be more positive (by about 1.17 W m −2 ) if hygroscopic soot particles are allowed to nucleate ice particles. The change in liquid water path dominates the anthropogenic forcing in mixed-phase clouds.
结合单粒子烟灰光度计测量研究丙烷火焰烟灰作为异质冰核的作用
DOI：
10.5194/acpd-11-11007-2011
发表时间：
2011
期刊：
--
影响因子：
--
作者：
Crawford I
通讯作者：
Crawford I