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| DOI | 10.1016/j.atmosres.2020.105030 |
| Repeatability of INP activation from the vapor | |
| Santachiara G.; Belosi F. | |
| 发表日期 | 2020 |
| ISSN | 0169-8095 |
| 卷号 | 243 |
| 英文摘要 | Laboratory generated aerosols and aerosol sampled in a field campaign were studied to assess the repeatability of heterogeneous ice activation processes and verify if the ice nuclei particles maintained their nucleating capability. Experiments were performed using a filter technique, i.e. aerosol particles were sampled on black-gridded cellulose nitrate membrane filters and assessed for ice nucleating particles in a dynamic filter-processing chamber at our ISAC-CNR laboratory. The laboratory investigations used Arizona Test Dust (ATD) generated by nebulizing a suspension of ATD. After nebulization, the wet aerosol in the carrier gas was dried and then sampled on a filter. Aerosol field sampling (size range PM1 and PM10) was carried out in the Arctic (Ny-Ålesund, Svalbard) from 12 to 23 April 2019. The activation processes were repeated twice for each filter at temperatures of −22 °C and −18 °C. For aerosol, ATD runs were performed only in conditions of supersaturation (saturation ratio Sw = 1.02), while for the Arctic aerosol, conditions below saturation were also considered (Sw = 0.96). The experiments showed that approximately 40% of the ATD particles maintain their initial nucleating efficiency, both at T = −22 °C and − 18 °C, and at Sw = 1.02, i.e. in the condensation freezing mode. The percentage of repeatability was higher for ATD with respect to the Artic-sampled aerosol processed in the condensation mode. This may depend on greater particle morphology variation of the mixed organic-inorganic aerosol due to the hydration and dehydration cycle. © 2020 Elsevier B.V. |
| 关键词 | Arctic vehiclesChemical activationCondensationIceSupersaturationActivation processAerosol particlesArizona test dustCellulose nitrate membrane filtersFilter techniquesLaboratory investigationsOrganic-inorganicParticle morphologiesAerosolsaerosolatmospheric depositionchemical reactioncondensationicenucleationwater vaporActivationAerosolsCondensationExperimentationFiltersIceParticlesSupersaturationArcticNy-AlesundSpitsbergenSvalbardSvalbard and Jan Mayen |
| 语种 | 英语 |
| 来源机构 | Atmospheric Research |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/132420 |
| 推荐引用方式 GB/T 7714 | Santachiara G.,Belosi F.. Repeatability of INP activation from the vapor[J]. Atmospheric Research,2020,243. |
| APA | Santachiara G.,&Belosi F..(2020).Repeatability of INP activation from the vapor.,243. |
| MLA | Santachiara G.,et al."Repeatability of INP activation from the vapor".243(2020). |
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