Dr. Fabian Mahrt

Postdoc Fellow
Forschungsstrasse 111
5232 Villigen PSI
Schweiz
I am an experimental atmospheric scientist with a strong interest in aerosol particles. Aerosol particles - small particulate suspensions in air - are ubiquitous in the atmosphere. They contribute to air pollution and considerably affect human health. Aerosols also impact Earth’s energy budget, with aerosol-cloud interactions contributing the largest uncertainties in predicting the anthropogenic impacts for future climate.
My scientific interests revolve around investigating the chemical and microphysical properties of aerosol particles and to explore how these are linked to various atmospheric processes, as evident in my ongoing and past research: In my PhD studies I investigated aerosol-cloud interactions, with a focus on understanding the ice nucleation abilities of soot particles. In my PostDoc studies I am working on topics related to physical chemistry of aerosols, with a focus on exploring the phase behavior and phase transitions in organic aerosol particles.
Details can be found in the work linked below. Please reach out if you have questions or are interested to learn more.
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Kiland KJ, Mahrt F, Peng L, Nikkho S, Zaks J, Crescenzo GV, et al.
Viscosity, glass formation, and mixing times within secondary organic aerosol from biomass burning phenolics
ACS Earth and Space Chemistry. 2023; 7(7): 1388-1400. https://doi.org/10.1021/acsearthspacechem.3c00039
DORA PSI -
Kärcher B, Marcolli C, Mahrt F
The role of mineral dust aerosol particles in aviation soot-cirrus interactions
Journal of Geophysical Research D: Atmospheres. 2023; 128(3): e2022JD037881 (15 pp.). https://doi.org/10.1029/2022JD037881
DORA PSI -
Mahrt F, Rosch C, Gao K, Dreimol CH, Zawadowicz MA, Kanji ZA
Physicochemical properties of charcoal aerosols derived from biomass pyrolysis affect their ice-nucleating abilities at cirrus and mixed-phase cloud conditions
Atmospheric Chemistry and Physics. 2023; 23(2): 1285-1308. https://doi.org/10.5194/acp-23-1285-2023
DORA PSI -
Baboomian VJ, Crescenzo GV, Huang Y, Mahrt F, Shiraiwa M, Bertram AK, et al.
Sunlight can convert atmospheric aerosols into a glassy solid state and modify their environmental impacts
Proceedings of the National Academy of Sciences of the United States of America PNAS. 2022; 119(43): e2208121119 (10 pp.). https://doi.org/10.1073/pnas.2208121119
DORA PSI -
Mahrt F, Peng L, Zaks J, Huang Y, Ohno PE, Smith NR, et al.
Not all types of secondary organic aerosol mix: two phases observed when mixing different secondary organic aerosol types
Atmospheric Chemistry and Physics. 2022; 22(20): 13783-13796. https://doi.org/10.5194/acp-22-13783-2022
DORA PSI -
Mahrt F, Huang Y, Zaks J, Devi A, Peng L, Ohno PE, et al.
Phase behavior of internal mixtures of hydrocarbon-like primary organic aerosol and secondary aerosol based on their differences in oxygen-to-carbon ratios
Environmental Science and Technology. 2022; 56(7): 3960-3973. https://doi.org/10.1021/acs.est.1c07691
DORA PSI -
Ohno PE, Wang J, Mahrt F, Varelas JG, Aruffo E, Ye J, et al.
Gas-Particle uptake and hygroscopic growth by organosulfate particles
ACS Earth and Space Chemistry. 2022; 6(10): 2481-2490. https://doi.org/10.1021/acsearthspacechem.2c00195
DORA PSI -
Xu S, Mahrt F, Gregson FKA, Bertram AK
Possible effects of ozone chemistry on the phase behavior of skin oil and cooking oil films and particles indoors
ACS Earth and Space Chemistry. 2022; 6(7): 1836-1845. https://doi.org/10.1021/acsearthspacechem.2c00092
DORA PSI -
Garofalo LA, He Y, Jathar SH, Pierce JR, Fredrickson CD, Palm BB, et al.
Heterogeneous nucleation drives particle size segregation in sequential ozone and nitrate radical oxidation of catechol
Environmental Science and Technology. 2021; 55(23): 15637-15645. https://doi.org/10.1021/acs.est.1c02984
DORA PSI -
Huang Y, Mahrt F, Xu S, Shiraiwa M, Zuend A, Bertram AK
Coexistence of three liquid phases in individual atmospheric aerosol particles
Proceedings of the National Academy of Sciences of the United States of America PNAS. 2021; 118(16): e2102512118 (9 pp.). https://doi.org/10.1073/pnas.2102512118
DORA PSI -
Kilchhofer K, Mahrt F, Kanji ZA
The role of cloud processing for the ice nucleating ability of organic aerosol and coal fly ash particles
Journal of Geophysical Research D: Atmospheres. 2021; 126(10): e2020JD033338 (21 pp.). https://doi.org/10.1029/2020JD033338
DORA PSI -
Kärcher B, Mahrt F, Marcolli C
Process-oriented analysis of aircraft soot-cirrus interactions constrains the climate impact of aviation
Communications Earth & Environment. 2021; 2(1): 113 (9 pp.). https://doi.org/10.1038/s43247-021-00175-x
DORA PSI -
Mahrt F, Newman E, Huang Y, Ammann M, Bertram AK
Phase behavior of hydrocarbon-like primary organic aerosol and secondary organic aerosol proxies based on their elemental oxygen-to-carbon ratio
Environmental Science and Technology. 2021; 55(18): 12202-12214. https://doi.org/10.1021/acs.est.1c02697
DORA PSI -
Marcolli C, Mahrt F, Kärcher B
Soot PCF: pore condensation and freezing framework for soot aggregates
Atmospheric Chemistry and Physics. 2021; 21(10): 7791-7843. https://doi.org/10.5194/acp-21-7791-2021
DORA PSI