From lab to field: examining immersion freezing of atmospheric relevant ice nucleating particles

从实验室到现场：检查大气相关冰成核颗粒的浸没冷冻

• 批准号: 201769474
• 负责人: Dr. Heike Wex
• 金额: --
• 依托单位: Abteilung Atmosphärische Mikrophysik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/201769474?language=en
• 关键词: lab; field; examining; immersion; freezing

The project suggested here, in RP6 of INUIT-2, aims at adding fundamental understanding to the workings of heterogeneous ice nucleation, and especially to the role of biological and mixed mineral-biological ice nucleating particles (INP) therein. The Leipzig Aerosol Cloud Interaction Simulator (LACIS) will be used to investigate the immersion freezing behaviour of a suite of different INP, including biological (fungal) and mixed biological-mineral INP, among them atmospherically relevant materials like soil dusts and INUIT-2 test samples. For the latter, results gained by different groups, from within and outside of INUIT, will be intercompared, as it had been successfully done in INUIT-1 using simpler test INP. For the INP proposed for examination in RP6 wherever meaningful and feasible, surface treatments such as coatings with reactive and nonreactive substances will be applied, and their influence of the particles to act as INP will be examined. As documented in earlier studies at LACIS, controlled surface treatments are an excellent tool for determining what it is that makes a particle an effective INP. Furthermore they allow for the elucidation of the effects of aging on INP. It is also planned to extend our measurements towards water sub-saturated conditions, in order to examine under which conditions the observed heterogeneous ice nucleation is due to the immersion freezing of concentrated solutions or deposition ice nucleation. From the experimental data gained, different parameterizations, both time dependent and time independent, will be derived and offered to the community for further use in modelling studies. The here proposed studies will significantly add to and complement the very successful works performed at LACIS during INUIT-1, which had focused more strongly on pure mineral dusts and pure biological particles. The examination of more complex and hence more atmospherically relevant INP will significantly contribute to understanding and quantifying atmospheric ice nucleation in general and the relative contributions of mineral and biological substances to atmospheric ice nucleation in particular.

这里在因纽特-2的RP6中建议的项目旨在增加对非均质冰成核工作原理的基本了解，特别是对生物和混合矿物-生物成冰粒子(INP)在其中的作用。莱比锡气溶胶云相互作用模拟器(LAIS)将用于研究一套不同INP的浸没冻结行为，包括生物(真菌)和混合生物-矿物INP，其中包括与大气相关的材料，如土壤粉尘和Inuit-2测试样品。对于后者，来自因纽特人内部和外部的不同群体获得的结果将进行相互比较，因为这已经在因纽特人1使用SIMPLE测试INP成功地进行了比较。对于建议在RP6中进行检查的INP，只要有意义和可行，将采用表面处理，如使用活性物质和非活性物质涂层，并检查它们对充当INP的颗粒的影响。正如Lacis的早期研究所证明的那样，受控表面处理是确定是什么使粒子成为有效的INP的极佳工具。此外，它们还可以阐明衰老对INP的影响。还计划将我们的测量扩展到水的亚饱和条件，以检查在哪些条件下观察到的非均质成冰是由于浓缩液的浸泡冻结或沉积成冰。从获得的实验数据，将得出不同的参数，包括时间相关的和时间无关的，并将提供给社会进一步用于模拟研究。在此拟议的研究将大大增加和补充在因纽特-1期间在Lacis进行的非常成功的工作，该工作更加侧重于纯矿物粉尘和纯生物颗粒。对更复杂的、因此与大气更相关的INP的研究将大大有助于理解和量化大气冰成核，特别是矿物和生物物质对大气冰成核的相对贡献。

项目成果

Immersion freezing of ice nucleation active protein complexes

冰成核活性蛋白复合物的浸泡冷冻

• DOI: 10.5194/acp-13-5751-2013
• 发表时间: 2013
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: Hartmann;S. Augustin;T. Clauss;H. Wex;T. Santl Temkiv;J. Voigtländer;D. Niedermeier;F. Stratmann
• 通讯作者: F. Stratmann

The immersion mode ice nucleation behavior of mineral dusts: A comparison of different pure and surface modified dusts

• DOI: 10.1002/2014gl061317
• 发表时间: 2014-10-28
• 期刊: GEOPHYSICAL RESEARCH LETTERS
• 影响因子: 5.2
• 作者: Augustin-Bauditz, S.;Wex, H.;Stratmann, F.
• 通讯作者: Stratmann, F.

Leipzig Ice Nucleation chamber Comparison (LINC): intercomparison of four online ice nucleation counters

莱比锡冰成核室比较 (LINC)：四个在线冰成核计数器的相互比较

• DOI: 10.5194/acp-17-11683-2017
• 发表时间: 2017
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: Burkert-Kohn;H. Wex;A. Welti;S. Hartmann;S. Grawe;L. Hellner;P. Herenz;J. D. Atkinson;F. Stratmann;Z. A. Kanji
• 通讯作者: Z. A. Kanji

Ice-nucleating particle concentrations unaffected by urban air pollution in Beijing, China

中国北京的冰核颗粒浓度不受城市空气污染的影响

• DOI: 10.5194/acp-18-3523-2018
• 发表时间: 2018-03-12
• 期刊: ATMOSPHERIC CHEMISTRY AND PHYSICS
• 影响因子: 6.3
• 作者: Chen, Jie;Wu, Zhijun;Wex, Heike
• 通讯作者: Wex, Heike

Kaolinite particles as ice nuclei: learning from the use of different kaolinite samples and different coatings

• DOI: 10.5194/acp-14-5529-2014
• 发表时间: 2014-06
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: H. Wex;P. DeMott;Y. Tobo;S. Hartmann;Michael Rösch;T. Clauss;L. Tomsche;D. Niedermeier;F. Stratmann