Pre‐Activation of Ice Nucleating Particles in Deposition Nucleation Mode: Evidence From Measurement Using a Static Vacuum Water Vapor Diffusion Chamber in Xinjiang, China
Pre‐Activation of Ice Nucleating Particles in Deposition Nucleation Mode: Evidence From Measurement Using a Static Vacuum Water Vapor Diffusion Chamber in Xinjiang, China
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DOI：
10.1029/2022gl099468
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发表时间：
2022-07
影响因子：
5.2
通讯作者：
X. Jing;J. Yang;T. Li;J. Hu;C. He;Y. Yin;P. DeMott;Z. Wang;H. Jiang;K. Chen
中科院分区：
文献类型：
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作者：
X. Jing;J. Yang;T. Li;J. Hu;C. He;Y. Yin;P. DeMott;Z. Wang;H. Jiang;K. Chen
冰成核粒子（INPs）的预活化是增强混合相云中冰生成的潜在机制，但INPs预活化的证据仍然有限。在这项研究中，在沉积模式下的INPs的预激活进行了研究，在一个静态的真空水蒸气扩散室与气溶胶采样在新疆，中国使用再冻结实验。结果表明，预活化后INP的活化效率提高。据统计，在预活化后，INP浓度在−10°C、−14°C和−17°C下分别增加了266%、112%和70%，超过一半的样品显示INP浓度增加。INP浓度的增加与预活化前的初始INP浓度呈正相关。这些分析提供了新的证据，表明预激活的INPs可以在-10 °C的温度下作为更好的核，并强调了在模型中找到考虑这种机制的方法的重要性。
Pre‐activation of ice nucleating particles (INPs) is a potential mechanism to enhance ice generation in mixed‐phase clouds, but evidence of INP pre‐activation is still limited. In this study, the pre‐activation of INPs in deposition mode is investigated using refreezing experiments in a static vacuum water vapor diffusion chamber with aerosols sampled in Xinjiang, China. The results indicate that the activation efficiency of INP was enhanced after pre‐activation. Statistically, the INP concentration increased by 266%, 112%, and 70% at −10°C, −14°C, and −17°C after pre‐activation, and more than half of the samples showed an increase in INP concentration. The increase in INP concentration has a positive correlation with the primary INP concentration before pre‐activation. The analyses provide new evidence that the pre‐activated INPs can act as better nuclei at temperature as warm as −10°C, and highlight the importance to find a way to consider this mechanism in models.