气候变化领域集成服务门户(CCPortal): Ice nucleation by aerosols from anthropogenic pollution

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DOI	10.1038/s41561-019-0389-4
	Ice nucleation by aerosols from anthropogenic pollution
	Zhao B.; Wang Y.; Gu Y.; Liou K.-N.; Jiang J.H.; Fan J.; Liu X.; Huang L.; Yung Y.L.
发表日期	2019
ISSN	17520894
卷号	12 期号:8
英文摘要	The formation of ice particles in the atmosphere strongly affects cloud properties and the climate. While mineral dust is known to be an effective ice nucleating particle, the role of aerosols from anthropogenic pollution in ice nucleation is still under debate. Here we probe the ice nucleation ability of different aerosol types by combining 11-year observations from multiple satellites and cloud-resolving model simulations. We find that, for strong convective systems, the ice particle effective radius near cloud top decreases with increasing loading of polluted continental aerosols, because the ice formation is dominated by homogeneous freezing of cloud droplets, which are smaller under more polluted conditions. By contrast, an increase in ice particle effective radius with polluted continental aerosols is found for moderate convection. Our model simulations suggest that this positive correlation is explained by enhanced heterogeneous ice nucleation and prolonged ice particle growth at higher aerosol loading, indicating that polluted continental aerosols contain a considerable fraction of ice nucleating particles. Similar aerosol–ice relationships are observed for dust aerosols, further corroborating the ice nucleation ability of polluted continental aerosols. By catalysing ice formation, aerosols from anthropogenic pollution could have profound impacts on cloud lifetime and radiative effect as well as precipitation efficiency. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	aerosol; anthropogenic source; cloud cover; cloud droplet; freezing; mineral dust; nucleation; pollution incidence; probe
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124636
作者单位	Joint Institute for Regional Earth System Science and Engineering and Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Department of Atmospheric Science, University of Wyoming, Laramie, WY, United States
推荐引用方式 GB/T 7714	Zhao B.,Wang Y.,Gu Y.,et al. Ice nucleation by aerosols from anthropogenic pollution[J],2019,12(8).
APA	Zhao B..,Wang Y..,Gu Y..,Liou K.-N..,Jiang J.H..,...&Yung Y.L..(2019).Ice nucleation by aerosols from anthropogenic pollution.Nature Geoscience,12(8).
MLA	Zhao B.,et al."Ice nucleation by aerosols from anthropogenic pollution".Nature Geoscience 12.8(2019).