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  • Large-scale ion generation for precipitation of atmospheric aerosols

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    Ostrikov448584-Published.pdf (3.561Mb)
    Author(s)
    Ma, Shaoxiang
    Cheng, He
    Li, Jiacheng
    Xu, Maoyuan
    Liu, Dawei
    Ostrikov, Kostya
    Griffith University Author(s)
    Ostrikov, Kostya (Ken)
    Year published
    2020
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    Abstract
    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. ...
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    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 (30 m ×23 m ×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.
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    Journal Title
    Atmospheric Chemistry and Physics
    Volume
    20
    Issue
    20
    DOI
    https://doi.org/10.5194/acp-20-11717-2020
    Copyright Statement
    © Author(s) 2020. This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
    Subject
    Astronomical and Space Sciences
    Atmospheric Sciences
    Science & Technology
    Life Sciences & Biomedicine
    Physical Sciences
    Environmental Sciences
    Meteorology & Atmospheric Sciences
    Publication URI
    http://hdl.handle.net/10072/400776
    Collection
    • Journal articles

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