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Molecular Understanding of the Enhancement in Organic Aerosol Mass at High Relative Humidity
/ Surdu, Mihnea ; Lamkaddam, Houssni ; Wang, Dongyu S ; Bell, David M ; Xiao, Mao ; Lee, Chuan Ping ; Li, Dandan ; Caudillo, Lucía ; Marie, Guillaume ; Scholz, Wiebke et al.
The mechanistic pathway by which high relative humidity (RH) affects gas–particle partitioning remains poorly understood, although many studies report increased secondary organic aerosol (SOA) yields at high RH. Here, we use real-time, molecular measurements of both the gas and particle phase to provide a mechanistic understanding of the effect of RH on the partitioning of biogenic oxidized organic molecules (from α-pinene and isoprene) at low temperatures (243 and 263 K) at the CLOUD chamber at CERN. [...]
2023 - 13 p.
- Published in : Environ. Sci. Technol. 57 (2023) 2297-2309
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2.
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Role of sesquiterpenes in biogenic new particle formation
/ Dada, Lubna (PSI, Villigen ; Helsinki U.) ; Stolzenburg, Dominik (Helsinki U. ; Vienna U. ; TU Vienna) ; Simon, Mario (Frankfurt U.) ; Fischer, Lukas (Innsbruck U.) ; Heinritzi, Martin (Frankfurt U.) ; Wang, Mingyi (Carnegie Mellon U. ; Caltech) ; Xiao, Mao (PSI, Villigen) ; Vogel, Alexander L (Frankfurt U.) ; Ahonen, Lauri (Helsinki U.) ; Amorim, Antonio (Lisbon U.) et al.
Biogenic vapors form new particles in the atmosphere, affecting global climate. The contributions of monoterpenes and isoprene to new particle formation (NPF) have been extensively studied. [...]
2023 - 14 p.
- Published in : Sci. Adv. 9 (2023) adi5297
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3.
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Ice nucleation ability of ammonium sulfate aerosol particles internally mixed with secondary organics
/ Bertozzi, Barbara (KIT, Karlsruhe) ; Wagner, Robert (KIT, Karlsruhe) ; Song, Junwei (KIT, Karlsruhe) ; Höhler, Kristina (KIT, Karlsruhe) ; Pfeifer, Joschka (CERN) ; Saathoff, Harald (KIT, Karlsruhe) ; Leisner, Thomas (KIT, Karlsruhe) ; Möhler, Ottmar (KIT, Karlsruhe)
The abundance of aerosol particles and their ability to catalyze ice nucleation are key parameters to correctly
understand and describe the aerosol indirect effect on the climate. Cirrus clouds strongly influence the Earth’s radiative
budget, but their effect is highly sensitive to their formation
mechanism, which is still poorly understood. [...]
2021 - 20 p.
- Published in : Atmos. Chem. Phys. 21 (2021) 10779-10798
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4.
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Chemical composition of nanoparticles from α-pinene nucleation and the influence of isoprene and relative humidity at low temperature
/ Caudillo, Lucía (Frankfurt U.) ; Rörup, Birte (Helsinki U.) ; Heinritzi, Martin (Frankfurt U.) ; Marie, Guillaume (Frankfurt U.) ; Simon, Mario (Frankfurt U.) ; Wagner, Andrea C (U. Colorado, Boulder) ; Müller, Tatjana (Frankfurt U. ; Mainz, Max Planck Inst.) ; Granzin, Manuel (Frankfurt U.) ; Amorim, Antonio (Lisbon U.) ; Ataei, Farnoush (TROPOS, Leibniz) et al.
Biogenic organic precursors play an important role
in atmospheric new particle formation (NPF). One of the major precursor species is α-pinene, which upon oxidation can
form a suite of products covering a wide range of volatilities.
Highly oxygenated organic molecules (HOMs) comprise a
fraction of the oxidation products formed [...]
2021 - 16 p.
- Published in : Atmos. Chem. Phys. 21 (2021) 17099-17114
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5.
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Aqueous phase oxidation of sulphur dioxide by ozone in cloud droplets
/ Hoyle, C R (PSI, Villigen ; Davos Observ.) ; Fuchs, C (PSI, Villigen) ; Järvinen, E (KIT, Karlsruhe) ; Saathoff, H (KIT, Karlsruhe) ; Dias, A (CERN) ; El Haddad, I (PSI, Villigen) ; Gysel, M (PSI, Villigen) ; Coburn, S C (Colorado U., CIRES) ; Tröstl, J (PSI, Villigen) ; Bernhammer, A -K (Innsbruck U. ; Ionicon Analytik GmbH, Innsbruck) et al.
The growth of aerosol due to the aqueous phase oxidation of sulfur dioxide by ozone was measured in laboratory-generated clouds created in the Cosmics Leaving OUtdoor Droplets (CLOUD) chamber at the European Organization for Nuclear Research (CERN). Experiments were performed at 10 and −10 °C, on acidic (sulfuric acid) and on partially to fully neutralised (ammonium sulfate) seed aerosol. [...]
2016 - 20 p.
- Published in : Atmosph. Chem. Phys. 16 (2016) 1693-1712
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Observation of viscosity transition in α-pinene secondary organic aerosol
/ Järvinen, Emma (KIT, Karlsruhe) ; Ignatius, Karoliina (TROPOS, Leibniz) ; Nichman, Leonid (Manchester U.) ; Kristensen, Thomas B (TROPOS, Leibniz) ; Fuchs, Claudia (PSI, Villigen) ; Hoyle, Christopher R (PSI, Villigen ; Davos Observ.) ; Höppel, Niko (KIT, Karlsruhe) ; Corbin, Joel C (PSI, Villigen) ; Craven, Jill (Caltech) ; Duplissy, Jonathan (Helsinki U.) et al.
Under certain conditions, secondary organic aerosol (SOA) particles can exist in the atmosphere in an amorphous solid or semi-solid state. To determine their relevance to processes such as ice nucleation or chemistry occurring within particles requires knowledge of the temperature and relative humidity (RH) range for SOA to exist in these states. [...]
2016 - 16 p.
- Published in : Atmosph. Chem. Phys. 16 (2016) 4423-4438
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7.
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Heterogeneous ice nucleation of viscous secondary organic aerosol produced from ozonolysis of α-pinene
/ Ignatius, Karoliina (TROPOS, Leibniz) ; Kristensen, Thomas B (TROPOS, Leibniz) ; Järvinen, Emma (KIT, Karlsruhe) ; Nichman, Leonid (Manchester U.) ; Fuchs, Claudia (PSI, Villigen) ; Gordon, Hamish (CERN) ; Herenz, Paul (KIT, Karlsruhe) ; Hoyle, Christopher R (PSI, Villigen ; Davos Observ.) ; Duplissy, Jonathan (Helsinki U.) ; Garimella, Sarvesh (MIT) et al.
There are strong indications that particles containing secondary organic aerosol (SOA) exhibit amorphous solid or semi-solid phase states in the atmosphere. This may facilitate heterogeneous ice nucleation and thus influence cloud properties. [...]
2016 - 15 p.
- Published in : Atmosph. Chem. Phys. 16 (2016) 6495-6509
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8.
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Phase transition observations and discrimination of small cloud particles by light polarization in expansion chamber experiments
/ Nichman, Leonid (Manchester U.) ; Fuchs, Claudia (PSI, Villigen) ; Järvinen, Emma (KIT, Karlsruhe) ; Ignatius, Karoliina (TROPOS, Leibniz) ; Höppel, Niko Florian (KIT, Karlsruhe) ; Dias, Antonio (CERN) ; Heinritzi, Martin (Goethe U., Frankfurt (main)) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Tröstl, Jasmin (PSI, Villigen) ; Wagner, Andrea Christine (Goethe U., Frankfurt (main)) et al.
Cloud microphysical processes involving the ice phase in tropospheric clouds are among the major uncertainties in cloud formation, weather, and general circulation models. The detection of aerosol particles, liquid droplets, and ice crystals, especially in the small cloud particle-size range below 50 μm, remains challenging in mixed phase, often unstable environments. [...]
2016 - 14 p.
- Published in : Atmosph. Chem. Phys. 16 (2016) 3651-3664
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9.
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The Karlsruhe aerosol chamber facility AIDA : technical description and first results of homogeneous and heterogeneous ice nucleation experiments
/ Möhler, O ; Nink, A ; Saathoff, H ; Schaefers, S ; Schnaiter, M ; Schöck, W ; Schurath, U
CERN, 2001
Published version from CERN: PDF;
In : Workshop on Ion-Aerosol-Cloud Interactions, CERN, Geneva, Switzerland, 18 - 20 Apr 2001, pp.163-168 (CERN-2001-007)
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