气候变化领域集成服务门户(CCPortal): Pragmatic protocols for working cleanly when measuring ice nucleating particles

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DOI	10.1016/j.atmosres.2020.105419
	Pragmatic protocols for working cleanly when measuring ice nucleating particles
	Barry K.R.; Hill T.C.J.; Jentzsch C.; Moffett B.F.; Stratmann F.; DeMott P.J.
发表日期	2021
ISSN	0169-8095
卷号	250
英文摘要	Measuring ice nucleating particles (INPs) is critical for understanding, and modeling, cloud formation, reflectivity, and precipitation patterns. However, because INPs are very rare in the atmosphere, but abundant—sometimes alarmingly so—in the dust that covers all work surfaces, contamination during processing of collected aerosol samples can be a significant hindrance to obtaining accurate measures of INPs. In preparing this technical note, we questioned the cleanliness of every collection and processing step involved in making immersion freezing measurements of INPs re-suspended from filter samples. The aim was to identify, and then minimize, all potential sources of significant contamination, including containers and tools used to store filters and prepare liquid suspensions, gloves, work surfaces, and the polymerase chain reaction (PCR) trays commonly used for sample analysis. While plasticware released few INPs, most gloves readily shed them, but this can be mitigated by using washed cleanroom vinyl or polyethylene gloves. Work surfaces, even those that had been cleaned, were prodigious reservoirs of contaminating INPs, but simply covering them with aluminum foil will provide an INP-free surface. By applying these practices, we developed a method to reduce the background level of INPs on Nuclepore™ polycarbonate filters in our tests to 0 at −25 °C and < 20 at −27 °C, making them suitable for use in all sampling environments. © 2020 Elsevier B.V.
英文关键词	Ice nucleating particle; Immersion freezing; Working clean
语种	英语
scopus关键词	Cleaning; Precipitation (meteorology); Background level; Immersion freezing; Liquid suspension; Measurements of; Polycarbonate filters; Potential sources; Precipitation patterns; Processing steps; Polymerase chain reaction; aerosol; cloud; dust; freezing; ice crystal
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162004
作者单位	Department of Atmospheric Science, Colorado State University, 1371 Campus Delivery, Fort Collins, CO 80523-1371, United States; Leibniz Institute for Tropospheric Research, Permoserstraße 15, Leipzig, 04318, Germany; Now at Leipziger Verkehrsbetriebe, Postfach 10 09 10, Leipzig, 04009, Germany; Ocean Lab, The Parrog, Fishguard Harbour, Goodwick, Pembrokeshire SA64 0DE, United Kingdom
推荐引用方式 GB/T 7714	Barry K.R.,Hill T.C.J.,Jentzsch C.,et al. Pragmatic protocols for working cleanly when measuring ice nucleating particles[J],2021,250.
APA	Barry K.R.,Hill T.C.J.,Jentzsch C.,Moffett B.F.,Stratmann F.,&DeMott P.J..(2021).Pragmatic protocols for working cleanly when measuring ice nucleating particles.Atmospheric Research,250.
MLA	Barry K.R.,et al."Pragmatic protocols for working cleanly when measuring ice nucleating particles".Atmospheric Research 250(2021).