气候变化领域集成服务门户(CCPortal): Large-scale ion generation for precipitation of atmospheric aerosols

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DOI	10.5194/acp-20-11717-2020
	Large-scale ion generation for precipitation of atmospheric aerosols
	Ma S.; Cheng H.; Li J.; Xu M.; Liu D.; Ostrikov K.
发表日期	2020
ISSN	1680-7316
起始页码	11717
结束页码	11727
卷号	20 期号:20
英文摘要	Artificial rain is explored as a remedy for climate change caused farmland drought and bushfires. Increasing the ion density in the open air is an efficient way to generate charged nuclei from atmospheric aerosols and induce precipitation or eliminate fog. Here we report on the development of a large commercial-installation-scale atmospheric ion generator based on corona plasma discharges, experimental monitoring, and numerical modeling of the parameters and range of the atmospheric ions, as well as the application of the generated ions to produce charged aerosols and induce precipitation at the scale of a large cloud chamber. The coverage area of the ions generated by the large corona discharge installation with the 7.2 km long wire electrode and applied voltage of -90 kV is studied under prevailing weather conditions including wind direction and speed. By synergizing over 300 000 localized corona discharge points, we demonstrate a substantial decrease in the decay of ions compared to a single corona discharge point in the open air, leading to large-scale (30m-23m-90 m) ion coverage. Once aerosols combine with the generated ions, charged nuclei are produced. Higher wind speed has led to larger areas covered by the plasma-generated ions. The cloud chamber experiments (relative humidity 130-10 %) suggest that charged aerosols generated by ions with a density of 104 cm-3 can accelerate the settlement of moisture by 38 %. These results are promising for the development of large-scale installations for the effective localized control of atmospheric phenomena. © 2020 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	aerosol; corona; ion; precipitation (climatology); wind direction; wind velocity
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247475
作者单位	State Key Lab of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China; Institute for Future Environments and School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD 4000, Australia
推荐引用方式 GB/T 7714	Ma S.,Cheng H.,Li J.,et al. Large-scale ion generation for precipitation of atmospheric aerosols[J],2020,20(20).
APA	Ma S.,Cheng H.,Li J.,Xu M.,Liu D.,&Ostrikov K..(2020).Large-scale ion generation for precipitation of atmospheric aerosols.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(20).
MLA	Ma S.,et al."Large-scale ion generation for precipitation of atmospheric aerosols".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.20(2020).