Ice Nucleation Activities of Carbon-Bearing Materials in Deposition Mode: From Graphite to Airplane Soot Surrogates

Ikhenazene, Raouf; Pirim, Claire; Noble, J. A.; Irimiea, Cornélia; Carpentier, Y.; Ortega, Ismaël K.; Ouf, F. X.; Focşa, Cristian; Chazallon, Bertrand

doi:10.1021/acs.jpcc.9b08715

Cited by 13 publications

(15 citation statements)

References 110 publications

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“…However, the model with parameters obtained using the adsorption data for graphitized carbon black (Fig. 3) is in excellent agreement with the CCN activation data for spark discharger particles that were subjected to ozonolysis prior to the activation measurement (Kotzick et al, 1997) (red squares) and, therefore, have an increased density of adsorption sites.…”

Section: Water Nucleation On Black Carbon Particlessupporting

confidence: 66%

“…Figure 4 depicts CCN activation data for hydrophobic and hydrophilic BC particles. The most hydrophobic particles (Kotzick et al, 1997) were produced using a spark discharger. The particles were only in contact with argon and nitrogen gases prior to the activation measurements (black spheres) and, thus, contained very few adsorption sites.…”

Section: Constraining Water Adsorption Parameters On Carbonmentioning

confidence: 99%

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Heterogeneous nucleation of water vapor on different types of black carbon particles

2020

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Abstract. The heterogeneous nucleation of water vapor on insoluble particles affects cloud formation, precipitation, the hydrological cycle, and climate. Despite its importance, heterogeneous nucleation remains a poorly understood phenomenon that relies heavily on empirical information for its quantitative description. Here, we examine the heterogeneous nucleation of water vapor on different types of soots as well as cloud drop activation of different types of soots, including both pure black carbon particles and black carbon particles mixed with secondary organic matter. We show that the recently developed adsorption nucleation theory quantitatively predicts the nucleation of water and droplet formation upon particles of the various soot types. A surprising consequence of this new understanding is that, with sufficient adsorption site density, soot particles can activate into cloud droplets – even when completely lacking any soluble material.

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Section: Water Nucleation On Black Carbon Particlessupporting

confidence: 66%

Section: Constraining Water Adsorption Parameters On Carbonmentioning

confidence: 99%

Heterogeneous nucleation of water vapor on different types of black carbon particles

2020

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“…PCA is very convenient to outline the subtle differences between datasets, since it reduces the dimensionality of complex data while preserving most of the information. PCA was applied to each of the five datasets (three L2MS ionization wavelengths and two SIMS polarities) following the procedure detailed in Popovicheva et al (2017), Irimiea et al (2018), and Duca et al (2019). Further information can also be found in Sect.…”

Section: Multivariate Data Analysis: Principal Component Analysis (Pca)mentioning

confidence: 99%

“…L2MS spectra obtained in this work are additionally reinforced with the SIMS spectra of deposited miniCAST PM, with no sample preparation prior to the analyses since the particulate matter is preferentially trapped on the front filter. Subtle differences and similarities between front and back filters are revealed using mass spectrometry measurements (L2MS and SIMS) and the re-cently developed advanced statistical methodologies Irimiea et al, 2018Irimiea et al, , 2019 based on principal component analysis (PCA).…”

Section: Introductionmentioning

confidence: 99%

Chemical discrimination of the particulate and gas phases of miniCAST exhausts using a two-filter collection method

et al. 2020

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Abstract. Combustion of hydrocarbons produces both particulate- and gas-phase emissions responsible for major impacts on atmospheric chemistry and human health. Ascertaining the impact of these emissions, especially on human health, is not straightforward because of our relatively poor knowledge of how chemical compounds are partitioned between the particle and gas phases. Accordingly, we propose coupling a two-filter sampling method with a multi-technique analytical approach to fully characterize the particulate- and gas-phase compositions of combustion by-products. The two-filter sampling method is designed to retain particulate matter (elemental carbon possibly covered in a surface layer of adsorbed molecules) on a first quartz fiber filter while letting the gas phase pass through and then trap the most volatile components on a second black-carbon-covered filter. All samples thus collected are subsequently subjected to a multi-technique analytical protocol involving two-step laser mass spectrometry (L2MS), secondary ion mass spectrometry (SIMS), and micro-Raman spectroscopy. Using the combination of this two-filter sampling–multi-technique approach in conjunction with advanced statistical methods, we are able to unravel distinct surface chemical compositions of aerosols generated with different set points of a miniCAST burner. Specifically, we successfully discriminate samples by their volatile, semi-volatile, and non-volatile polycyclic aromatic hydrocarbon (PAH) contents and reveal how subtle changes in combustion parameters affect particle surface chemistry.

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“…Depending on the composition and structure of the particles, carbonaceous particles can also have the capability to act as cloud condensation nuclei and ice nuclei (e.g. Spracklen et al, 2011;Pierce et al, 2007;Prenni et al, 2012;Häusler et al, 2018;Ikhenazene et al, 2020).…”

mentioning

confidence: 99%

Investigation of structural changes of atmospheric aerosol samples during two thermal-optical measurement procedures (EUSAAR2, NIOSH870)

Haller¹,

Sommer²,

Steinkogler³

et al. 2020

Preprint

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Abstract. Thermal-optical measurement techniques are widely used for the monitoring of carbonaceous aerosols. Although results of different thermal-optical measurement techniques are comparable for total carbon, they can vary widely for values of elemental carbon especially in the presence of brown carbon. Charring of organic material during the inert heating phase of thermal-optical measurements was found to be a major confounder, but no literature about investigations of structural changes during this process in atmospheric aerosols is available. In a recent study we investigated these structural changes for combustion aerosol standard soot (CAST). Now we apply this approach to selected atmospheric aerosol filter samples and a subset of eight washed filter samples with low WSOCs loadings. To investigate structural changes, Raman spectra were obtained for samples heated to the corresponding temperature levels and gas atmospheres of the EUSAAR2 and NIOSH870 protocols. The temperature levels where changes in the Raman spectra occurred (i.e. changes in structure) varied for different samples. For the washed samples with low WSOC loadings and absence of other water soluble aerosol components such as inorganic salts, changes in structural ordering and darkening of the samples were not observed. For all samples, ion chromatography, integrating sphere measurements (yielding black and brown carbon data) and thermal-optical analyses were performed. We were able to show for the first time that the darkening of a sample (measured in terms of transmission laser signal) is not necessarily caused by an increase of structural ordering in the sample. Therefore we suggest that the widely used term charring should be used carefully when the darkening of a sample during thermal-optical measurement procedures is interpreted.

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Ice Nucleation Activities of Carbon-Bearing Materials in Deposition Mode: From Graphite to Airplane Soot Surrogates

Cited by 13 publications

References 110 publications

Heterogeneous nucleation of water vapor on different types of black carbon particles

Heterogeneous nucleation of water vapor on different types of black carbon particles

Chemical discrimination of the particulate and gas phases of miniCAST exhausts using a two-filter collection method

Investigation of structural changes of atmospheric aerosol samples during two thermal-optical measurement procedures (EUSAAR2, NIOSH870)

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