Observation of viscosity transition in α-pinene secondary organic aerosol

Emma Jaervinen; Karoliina Ignatius; Leonid Nichman; Thomas B. Kristensen; Claudia Fuchs; Christopher R. Hoyle; Niko Hoeppel; Joel C. Corbin; Jill Craven; Jonathan Duplissy; Sebastian Ehrhart; Imad El Haddad; Carla Frege; Hamish Gordon; Tuija Jokinen; Peter Kallinger; Jasper Kirkby; Alexei Kiselev; Karl-Heinz Naumann; Tuukka Petaja; Tamara Pinterich; Andre S. H. Prevot; Harald Saathoff; Thea Schiebel; Kamalika Sengupta; Mario Simon; Jay G. Slowik; Jasmin Troestl; Annele Virtanen; Paul Vochezer; Steffen Vogt; Andrea C. Wagner; Robert Wagner; Christina Williamson; Paul M. Winkler; Chao Yan; Urs Baltensperger; Neil M. Donahue; Rick C. Flagan; Martin Gallagher; Armin Hansel; Markku Kulmala; Frank Stratmann; Douglas R. Worsnop; Ottmar Moehler; Thomas Leisner; Martin Schnaiter

doi:10.5194/acp-16-4423-2016

Observation of viscosity transition in α-pinene secondary organic aerosol

Emma Jaervinen (Corresponding author), Karoliina Ignatius, Leonid Nichman, Thomas B. Kristensen, Claudia Fuchs, Christopher R. Hoyle, Niko Hoeppel, Joel C. Corbin, Jill Craven, Jonathan Duplissy, Sebastian Ehrhart, Imad El Haddad, Carla Frege, Hamish Gordon, Tuija Jokinen, Peter Kallinger, Jasper Kirkby, Alexei Kiselev, Karl-Heinz Naumann, Tuukka PetajaTamara Pinterich, Andre S. H. Prevot, Harald Saathoff, Thea Schiebel, Kamalika Sengupta, Mario Simon, Jay G. Slowik, Jasmin Troestl, Annele Virtanen, Paul Vochezer, Steffen Vogt, Andrea C. Wagner, Robert Wagner, Christina Williamson, Paul M. Winkler, Chao Yan, Urs Baltensperger, Neil M. Donahue, Rick C. Flagan, Martin Gallagher, Armin Hansel, Markku Kulmala, Frank Stratmann, Douglas R. Worsnop, Ottmar Moehler, Thomas Leisner, Martin Schnaiter

Aerosol Physics and Environmental Physics

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

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. In the Cosmics Leaving Outdoor Droplets (CLOUD) experiment at The European Organisation for Nuclear Research (CERN), we deployed a new in situ optical method to detect the viscous state of α-pinene SOA particles and measured their transition from the amorphous highly viscous state to states of lower viscosity. The method is based on the depolarising properties of laboratory-produced non-spherical SOA particles and their transformation to non-depolarising spherical particles at relative humidities near the deliquescence point. We found that particles formed and grown in the chamber developed an asymmetric shape through coagulation. A transition to a spherical shape was observed as the RH was increased to between 35% at-10°C and 80% at-38°C, confirming previous calculations of the viscosity-transition conditions. Consequently, α-pinene SOA particles exist in a viscous state over a wide range of ambient conditions, including the cirrus region of the free troposphere. This has implications for the physical, chemical, and ice-nucleation properties of SOA and SOA-coated particles in the atmosphere.

Original language	English
Pages (from-to)	4423-4438
Number of pages	16
Journal	Atmospheric Chemistry and Physics
Volume	16
Issue number	7
DOIs	https://doi.org/10.5194/acp-16-4423-2016
Publication status	Published - 2016

Austrian Fields of Science 2012

103039 Aerosol physics

Keywords

LINEAR DEPOLARIZATION RATIO
ICE NUCLEATION
CLOUD CHAMBER
NONSPHERICAL PARTICLES
ATMOSPHERIC AEROSOLS
OXIDATION-PRODUCTS
RELATIVE-HUMIDITY
MASS-SPECTROMETRY
GLASSY AEROSOLS
SOA PARTICLES

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http://phaidra.univie.ac.at/o:527543Licence: CC BY 3.0

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Jaervinen, E., Ignatius, K., Nichman, L., Kristensen, T. B., Fuchs, C., Hoyle, C. R., Hoeppel, N., Corbin, J. C., Craven, J., Duplissy, J., Ehrhart, S., El Haddad, I., Frege, C., Gordon, H., Jokinen, T., Kallinger, P., Kirkby, J., Kiselev, A., Naumann, K.-H., ... Schnaiter, M. (2016). Observation of viscosity transition in α-pinene secondary organic aerosol. Atmospheric Chemistry and Physics, 16(7), 4423-4438. https://doi.org/10.5194/acp-16-4423-2016

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title = "Observation of viscosity transition in α-pinene secondary organic aerosol",

abstract = "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. In the Cosmics Leaving Outdoor Droplets (CLOUD) experiment at The European Organisation for Nuclear Research (CERN), we deployed a new in situ optical method to detect the viscous state of α-pinene SOA particles and measured their transition from the amorphous highly viscous state to states of lower viscosity. The method is based on the depolarising properties of laboratory-produced non-spherical SOA particles and their transformation to non-depolarising spherical particles at relative humidities near the deliquescence point. We found that particles formed and grown in the chamber developed an asymmetric shape through coagulation. A transition to a spherical shape was observed as the RH was increased to between 35% at-10°C and 80% at-38°C, confirming previous calculations of the viscosity-transition conditions. Consequently, α-pinene SOA particles exist in a viscous state over a wide range of ambient conditions, including the cirrus region of the free troposphere. This has implications for the physical, chemical, and ice-nucleation properties of SOA and SOA-coated particles in the atmosphere.",

keywords = "LINEAR DEPOLARIZATION RATIO, ICE NUCLEATION, CLOUD CHAMBER, NONSPHERICAL PARTICLES, ATMOSPHERIC AEROSOLS, OXIDATION-PRODUCTS, RELATIVE-HUMIDITY, MASS-SPECTROMETRY, GLASSY AEROSOLS, SOA PARTICLES",

author = "Emma Jaervinen and Karoliina Ignatius and Leonid Nichman and Kristensen, {Thomas B.} and Claudia Fuchs and Hoyle, {Christopher R.} and Niko Hoeppel and Corbin, {Joel C.} and Jill Craven and Jonathan Duplissy and Sebastian Ehrhart and {El Haddad}, Imad and Carla Frege and Hamish Gordon and Tuija Jokinen and Peter Kallinger and Jasper Kirkby and Alexei Kiselev and Karl-Heinz Naumann and Tuukka Petaja and Tamara Pinterich and Prevot, {Andre S. H.} and Harald Saathoff and Thea Schiebel and Kamalika Sengupta and Mario Simon and Slowik, {Jay G.} and Jasmin Troestl and Annele Virtanen and Paul Vochezer and Steffen Vogt and Wagner, {Andrea C.} and Robert Wagner and Christina Williamson and Winkler, {Paul M.} and Chao Yan and Urs Baltensperger and Donahue, {Neil M.} and Flagan, {Rick C.} and Martin Gallagher and Armin Hansel and Markku Kulmala and Frank Stratmann and Worsnop, {Douglas R.} and Ottmar Moehler and Thomas Leisner and Martin Schnaiter",

note = "Publisher Copyright: {\textcopyright} 2016 Author(s).",

year = "2016",

doi = "10.5194/acp-16-4423-2016",

language = "English",

volume = "16",

pages = "4423--4438",

journal = "Atmospheric Chemistry and Physics",

issn = "1680-7316",

publisher = "COPERNICUS GESELLSCHAFT MBH",

number = "7",

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Jaervinen, E, Ignatius, K, Nichman, L, Kristensen, TB, Fuchs, C, Hoyle, CR, Hoeppel, N, Corbin, JC, Craven, J, Duplissy, J, Ehrhart, S, El Haddad, I, Frege, C, Gordon, H, Jokinen, T, Kallinger, P, Kirkby, J, Kiselev, A, Naumann, K-H, Petaja, T, Pinterich, T, Prevot, ASH, Saathoff, H, Schiebel, T, Sengupta, K, Simon, M, Slowik, JG, Troestl, J, Virtanen, A, Vochezer, P, Vogt, S, Wagner, AC, Wagner, R, Williamson, C, Winkler, PM, Yan, C, Baltensperger, U, Donahue, NM, Flagan, RC, Gallagher, M, Hansel, A, Kulmala, M, Stratmann, F, Worsnop, DR, Moehler, O, Leisner, T & Schnaiter, M 2016, 'Observation of viscosity transition in α-pinene secondary organic aerosol', Atmospheric Chemistry and Physics, vol. 16, no. 7, pp. 4423-4438. https://doi.org/10.5194/acp-16-4423-2016

TY - JOUR

T1 - Observation of viscosity transition in α-pinene secondary organic aerosol

AU - Jaervinen, Emma

AU - Ignatius, Karoliina

AU - Nichman, Leonid

AU - Kristensen, Thomas B.

AU - Fuchs, Claudia

AU - Hoyle, Christopher R.

AU - Hoeppel, Niko

AU - Corbin, Joel C.

AU - Craven, Jill

AU - Duplissy, Jonathan

AU - Ehrhart, Sebastian

AU - El Haddad, Imad

AU - Frege, Carla

AU - Gordon, Hamish

AU - Jokinen, Tuija

AU - Kallinger, Peter

AU - Kirkby, Jasper

AU - Kiselev, Alexei

AU - Naumann, Karl-Heinz

AU - Petaja, Tuukka

AU - Pinterich, Tamara

AU - Prevot, Andre S. H.

AU - Saathoff, Harald

AU - Schiebel, Thea

AU - Sengupta, Kamalika

AU - Simon, Mario

AU - Slowik, Jay G.

AU - Troestl, Jasmin

AU - Virtanen, Annele

AU - Vochezer, Paul

AU - Vogt, Steffen

AU - Wagner, Andrea C.

AU - Wagner, Robert

AU - Williamson, Christina

AU - Winkler, Paul M.

AU - Yan, Chao

AU - Baltensperger, Urs

AU - Donahue, Neil M.

AU - Flagan, Rick C.

AU - Gallagher, Martin

AU - Hansel, Armin

AU - Kulmala, Markku

AU - Stratmann, Frank

AU - Worsnop, Douglas R.

AU - Moehler, Ottmar

AU - Leisner, Thomas

AU - Schnaiter, Martin

PY - 2016

Y1 - 2016

N2 - 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. In the Cosmics Leaving Outdoor Droplets (CLOUD) experiment at The European Organisation for Nuclear Research (CERN), we deployed a new in situ optical method to detect the viscous state of α-pinene SOA particles and measured their transition from the amorphous highly viscous state to states of lower viscosity. The method is based on the depolarising properties of laboratory-produced non-spherical SOA particles and their transformation to non-depolarising spherical particles at relative humidities near the deliquescence point. We found that particles formed and grown in the chamber developed an asymmetric shape through coagulation. A transition to a spherical shape was observed as the RH was increased to between 35% at-10°C and 80% at-38°C, confirming previous calculations of the viscosity-transition conditions. Consequently, α-pinene SOA particles exist in a viscous state over a wide range of ambient conditions, including the cirrus region of the free troposphere. This has implications for the physical, chemical, and ice-nucleation properties of SOA and SOA-coated particles in the atmosphere.

AB - 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. In the Cosmics Leaving Outdoor Droplets (CLOUD) experiment at The European Organisation for Nuclear Research (CERN), we deployed a new in situ optical method to detect the viscous state of α-pinene SOA particles and measured their transition from the amorphous highly viscous state to states of lower viscosity. The method is based on the depolarising properties of laboratory-produced non-spherical SOA particles and their transformation to non-depolarising spherical particles at relative humidities near the deliquescence point. We found that particles formed and grown in the chamber developed an asymmetric shape through coagulation. A transition to a spherical shape was observed as the RH was increased to between 35% at-10°C and 80% at-38°C, confirming previous calculations of the viscosity-transition conditions. Consequently, α-pinene SOA particles exist in a viscous state over a wide range of ambient conditions, including the cirrus region of the free troposphere. This has implications for the physical, chemical, and ice-nucleation properties of SOA and SOA-coated particles in the atmosphere.

KW - LINEAR DEPOLARIZATION RATIO

KW - ICE NUCLEATION

KW - CLOUD CHAMBER

KW - NONSPHERICAL PARTICLES

KW - ATMOSPHERIC AEROSOLS

KW - OXIDATION-PRODUCTS

KW - RELATIVE-HUMIDITY

KW - MASS-SPECTROMETRY

KW - GLASSY AEROSOLS

KW - SOA PARTICLES

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U2 - 10.5194/acp-16-4423-2016

DO - 10.5194/acp-16-4423-2016

M3 - Article

SN - 1680-7316

VL - 16

SP - 4423

EP - 4438

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

IS - 7

ER -

Observation of viscosity transition in α-pinene secondary organic aerosol

Abstract

Austrian Fields of Science 2012

Keywords

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