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Preprints
https://doi.org/10.5194/egusphere-2024-151
https://doi.org/10.5194/egusphere-2024-151
25 Jan 2024
 | 25 Jan 2024

Contrail processed aviation soot aerosol are poor ice nucleating particles at cirrus temperatures

Baptiste Testa, Lukas Durdina, Jacinta Edebeli, Curdin Spirig, and Zamin A. Kanji

Abstract. Aviation soot surrogates processed in contrails are believed to become potent ice nuclei at cirrus temperature. This is not verified for real aviation soot, that can have vastly different physico-chemical properties. Here, we sampled soot particles from in-use commercial aircraft engines and quantified the effect of contrail processing on their ice nucleation ability at T < 228 K. We show that aviation soot becomes compacted upon contrail processing but this does not change their ice nucleation ability in contrast to other soot types. The presence of H2SO4 condensed in soot pores, the highly fused nature of the soot primary particles and their arrangement limit the volume of pores generated upon contrail processing, limiting sites for ice nucleation. Furthermore, we hypothesized that contrail processed aviation soot particles emitted from alternative jet fuel would also be poor ice nucleating particles if their emission sizes remain small (< 150 nm).

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Journal article(s) based on this preprint

19 Sep 2024
Simulated contrail-processed aviation soot aerosols are poor ice-nucleating particles at cirrus temperatures
Baptiste Testa, Lukas Durdina, Jacinta Edebeli, Curdin Spirig, and Zamin A. Kanji
Atmos. Chem. Phys., 24, 10409–10424, https://doi.org/10.5194/acp-24-10409-2024,https://doi.org/10.5194/acp-24-10409-2024, 2024
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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

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Aviation soot residuals released from contrail can become compacted upon sublimation of the ice...
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