On the role of ice‐nucleating aerosol in the formation of ice particles in tropical mesoscale convective systems

On the role of ice‐nucleating aerosol in the formation of ice particles in tropical mesoscale convective systems
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冰核气溶胶在热带中尺度对流系统冰粒形成中的作用

DOI:
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发表时间:
2017
影响因子:
5.2
通讯作者:
A. Ackerman
A. Ackerman
中科院分区:
地球科学1区
文献类型:
--
作者:
Luis A. Ladino;A. Korolev;I. Heckman;M. Wolde;A. Fridlind;A. Ackerman

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几十年来,云物理界一直在争论气溶胶粒子在冰形成中的性质和作用。本研究表明,在热带中尺度对流系统中,测量到的冰晶浓度比冰核粒子(INPs)的浓度高出好几个数量级。通过测量0.5 ~ 1µm大小的气溶胶颗粒浓度来评估INPs的浓度。本研究的观测结果表明,在热带中尺度对流系统中形成的初级冰晶对冰晶总浓度的贡献很小。这是通过比较预测的INP数浓度与原位冰粒子数浓度发现的。获得的测量结果表明,冰倍增可能是这种类型对流系统中观测到的高浓度冰晶的解释。
Over the decades, the cloud physics community has debated the nature and role of aerosol particles in ice initiation. The present study shows that the measured concentration of ice crystals in tropical mesoscale convective systems exceeds the concentration of ice nucleating particles (INPs) by several orders of magnitude. The concentration of INPs was assessed from the measured aerosol particle concentration in the size range of 0.5 to 1 µm. The observations from this study suggest that primary ice crystals formed on INPs make only a minor contribution to the total concentration of ice crystals in tropical mesoscale convective systems. This is found by comparing the predicted INP number concentrations with in situ ice particle number concentrations. The obtained measurements suggest that ice multiplication is the likely explanation for the observed high concentrations of ice crystals in this type of convective system.
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发表时间: 2015
影响因子: 3.8
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