Formation and growth of sub-3-nm aerosol particles in experimental chambers
| Autor: | Juha Kangasluoma, Chao Yan, Lauri Ahonen, Tuukka Petäjä, Lubna Dada, Biwu Chu, Tuomo Nieminen, Katrianne Lehtipalo, Kari E. J. Lehtinen, Rima Baalbaki, Markku Kulmala, Jonathan Duplissy, Jenni Kontkanen, Veli-Matti Kerminen |
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| Přispěvatelé: | Air quality research group, Institute for Atmospheric and Earth System Research (INAR), Global Atmosphere-Earth surface feedbacks, Helsinki Institute of Physics, Polar and arctic atmospheric research (PANDA) |
| Rok vydání: | 2020 |
| Předmět: |
Instrumentation
Nuclear engineering Flux SMOG CHAMBER 114 Physical sciences General Biochemistry Genetics and Molecular Biology VAPOR WALL LOSS 03 medical and health sciences 0302 clinical medicine ATMOSPHERIC NUCLEATION SECONDARY ORGANIC AEROSOL Particle dynamics METHANESULFONIC-ACID Cluster (physics) Cloud condensation nuclei PHASE CHEMICAL MECHANISMS NUCLEATION MODE PARTICLES ION-ION RECOMBINATION 030304 developmental biology 0303 health sciences SULFURIC ACID-AMINE Aerosol 13. Climate action Particle diameter Environmental science Particle 030217 neurology & neurosurgery IONIZATION MASS-SPECTROMETER |
| Zdroj: | NATURE PROTOCOLS |
| ISSN: | 1750-2799 1754-2189 |
| Popis: | Atmospheric new particle formation (NPF), which is observed in many environments globally, is an important source of boundary-layer aerosol particles and cloud condensation nuclei, which affect both the climate and human health. To better understand the mechanisms behind NPF, chamber experiments can be used to simulate this phenomenon under well-controlled conditions. Recent advancements in instrumentation have made it possible to directly detect the first steps of NPF of molecular clusters (~1–2 nm in diameter) and to calculate quantities such as the formation and growth rates of these clusters. Whereas previous studies reported particle formation rates as the flux of particles across a specified particle diameter or calculated them from measurements of larger particle sizes, this protocol outlines methods to directly quantify particle dynamics for cluster sizes. Here, we describe the instrumentation and analysis methods needed to quantify particle dynamics during NPF of sub-3-nm aerosol particles in chamber experiments. The methods described in this protocol can be used to make results from different chamber experiments comparable. The experimental setup, collection and post-processing of the data, and thus completion of this protocol, take from months up to years, depending on the chamber facility, experimental plan and level of expertise. Use of this protocol requires engineering capabilities and expertise in data analysis. This protocol describes the instrumentation and analysis methods needed to quantify particle dynamics during new particle formation of sub-3-nm aerosol particles in chamber experiments. |
| Databáze: | OpenAIRE |
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