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Title: Predicting secondary organic aerosol phase state and viscosity and its effect on multiphase chemistry in a regional-scale air quality model

Abstract

Atmospheric aerosols are a significant public health hazard and have substantial impacts on the climate. Secondary organic aerosols (SOAs) have been shown to phase separate into a highly viscous organic outer layer surrounding an aqueous core. This phase separation can decrease the partitioning of semi-volatile and low-volatile species to the organic phase and alter the extent of acid-catalyzed reactions in the aqueous core. A new algorithm that can determine SOA phase separation based on their glass transition temperature (Tg), oxygen to carbon (O:C) ratio and organic mass to sulfate ratio, and meteorological conditions was implemented into the Community Multiscale Air Quality Modeling (CMAQ) system version 5.2.1 and was used to simulate the conditions in the continental United States for the summer of 2013. SOA formed at the ground/surface level was predicted to be phase separated with core–shell morphology, i.e., aqueous inorganic core surrounded by organic coating 65.4 % of the time during the 2013 Southern Oxidant and Aerosol Study (SOAS) on average in the isoprene-rich southeastern United States. Our estimate is in proximity to the previously reported ~70 % in literature. The phase states of organic coatings switched between semi-solid and liquid states, depending on the environmental conditions. The semi-solid shellmore » occurring with lower aerosol liquid water content (western United States and at higher altitudes) has a viscosity that was predicted to be 102–1012 Pa s, which resulted in organic mass being decreased due to diffusion limitation. Organic aerosol was primarily liquid where aerosol liquid water was dominant (eastern United States and at the surface), with a viscosity <102 Pa s. Phase separation while in a liquid phase state, i.e., liquid–liquid phase separation (LLPS), also reduces reactive uptake rates relative to homogeneous internally mixed liquid morphology but was lower than aerosols with a thick viscous organic shell. The sensitivity cases performed with different phase-separation parameterization and dissolution rate of isoprene epoxydiol (IEPOX) into the particle phase in CMAQ can have varying impact on fine particulate matter (PM2.5) organic mass, in terms of bias and error compared to field data collected during the 2013 SOAS. This highlights the need to better constrain the parameters that govern phase state and morphology of SOA, as well as expand mechanistic representation of multiphase chemistry for non-IEPOX SOA formation in models aided by novel experimental insights.« less

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5];  [1]; ORCiD logo [1];  [6];  [6]; ORCiD logo [7];  [6]
  1. Univ. of North Carolina, Chapel Hill, NC (United States)
  2. Univ. of North Carolina, Chapel Hill, NC (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Univ. of North Carolina, Chapel Hill, NC (United States); Aerodyne Research, Inc., Billerica, MA (United States)
  4. Univ. of North Carolina, Chapel Hill, NC (United States); US Environmental Protection Agency (EPA), Research Triangle Park, NC (United States)
  5. Univ. of California, Riverside, CA (United States)
  6. Univ. of Washington, Seattle, WA (United States)
  7. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF); National Institutes of Health (NIH)
OSTI Identifier:
1650723
Report Number(s):
PNNL-SA-153998
Journal ID: ISSN 1680-7324
Grant/Contract Number:  
AC05-76RL01830; AGS-1524731; AGS-1250569; AGS-1644406; AGS-1703535; SC0018221
Resource Type:
Accepted Manuscript
Journal Name:
Atmospheric Chemistry and Physics (Online)
Additional Journal Information:
Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 20; Journal Issue: 13; Journal ID: ISSN 1680-7324
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Aerosol dynamics; aerosol phase state and morphology; atmospheric modeling; tropospheric chemistry; reactive uptake

Citation Formats

Schmedding, Ryan, Rasool, Quazi Z., Zhang, Yue, Pye, Havala O. T., Zhang, Haofei, Chen, Yuzhi, Surratt, Jason D., Lopez-Hilfiker, Felipe D., Thornton, Joel A., Goldstein, Allen H., and Vizuete, William. Predicting secondary organic aerosol phase state and viscosity and its effect on multiphase chemistry in a regional-scale air quality model. United States: N. p., 2020. Web. doi:10.5194/acp-20-8201-2020.
Schmedding, Ryan, Rasool, Quazi Z., Zhang, Yue, Pye, Havala O. T., Zhang, Haofei, Chen, Yuzhi, Surratt, Jason D., Lopez-Hilfiker, Felipe D., Thornton, Joel A., Goldstein, Allen H., & Vizuete, William. Predicting secondary organic aerosol phase state and viscosity and its effect on multiphase chemistry in a regional-scale air quality model. United States. https://doi.org/10.5194/acp-20-8201-2020
Schmedding, Ryan, Rasool, Quazi Z., Zhang, Yue, Pye, Havala O. T., Zhang, Haofei, Chen, Yuzhi, Surratt, Jason D., Lopez-Hilfiker, Felipe D., Thornton, Joel A., Goldstein, Allen H., and Vizuete, William. Thu . "Predicting secondary organic aerosol phase state and viscosity and its effect on multiphase chemistry in a regional-scale air quality model". United States. https://doi.org/10.5194/acp-20-8201-2020. https://www.osti.gov/servlets/purl/1650723.
@article{osti_1650723,
title = {Predicting secondary organic aerosol phase state and viscosity and its effect on multiphase chemistry in a regional-scale air quality model},
author = {Schmedding, Ryan and Rasool, Quazi Z. and Zhang, Yue and Pye, Havala O. T. and Zhang, Haofei and Chen, Yuzhi and Surratt, Jason D. and Lopez-Hilfiker, Felipe D. and Thornton, Joel A. and Goldstein, Allen H. and Vizuete, William},
abstractNote = {Atmospheric aerosols are a significant public health hazard and have substantial impacts on the climate. Secondary organic aerosols (SOAs) have been shown to phase separate into a highly viscous organic outer layer surrounding an aqueous core. This phase separation can decrease the partitioning of semi-volatile and low-volatile species to the organic phase and alter the extent of acid-catalyzed reactions in the aqueous core. A new algorithm that can determine SOA phase separation based on their glass transition temperature (Tg), oxygen to carbon (O:C) ratio and organic mass to sulfate ratio, and meteorological conditions was implemented into the Community Multiscale Air Quality Modeling (CMAQ) system version 5.2.1 and was used to simulate the conditions in the continental United States for the summer of 2013. SOA formed at the ground/surface level was predicted to be phase separated with core–shell morphology, i.e., aqueous inorganic core surrounded by organic coating 65.4 % of the time during the 2013 Southern Oxidant and Aerosol Study (SOAS) on average in the isoprene-rich southeastern United States. Our estimate is in proximity to the previously reported ~70 % in literature. The phase states of organic coatings switched between semi-solid and liquid states, depending on the environmental conditions. The semi-solid shell occurring with lower aerosol liquid water content (western United States and at higher altitudes) has a viscosity that was predicted to be 102–1012 Pa s, which resulted in organic mass being decreased due to diffusion limitation. Organic aerosol was primarily liquid where aerosol liquid water was dominant (eastern United States and at the surface), with a viscosity <102 Pa s. Phase separation while in a liquid phase state, i.e., liquid–liquid phase separation (LLPS), also reduces reactive uptake rates relative to homogeneous internally mixed liquid morphology but was lower than aerosols with a thick viscous organic shell. The sensitivity cases performed with different phase-separation parameterization and dissolution rate of isoprene epoxydiol (IEPOX) into the particle phase in CMAQ can have varying impact on fine particulate matter (PM2.5) organic mass, in terms of bias and error compared to field data collected during the 2013 SOAS. This highlights the need to better constrain the parameters that govern phase state and morphology of SOA, as well as expand mechanistic representation of multiphase chemistry for non-IEPOX SOA formation in models aided by novel experimental insights.},
doi = {10.5194/acp-20-8201-2020},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 13,
volume = 20,
place = {United States},
year = {Thu Jul 16 00:00:00 EDT 2020},
month = {Thu Jul 16 00:00:00 EDT 2020}
}

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  • Liu, Yuechen; Wu, Zhijun; Huang, Xiaofeng
  • Environmental Science & Technology, Vol. 53, Issue 9
  • DOI: 10.1021/acs.est.9b01196

Aqueous-phase mechanism for secondary organic aerosol formation from isoprene: application to the southeast United States and co-benefit of SO 2 emission controls
journal, January 2016

  • Marais, E. A.; Jacob, D. J.; Jimenez, J. L.
  • Atmospheric Chemistry and Physics, Vol. 16, Issue 3
  • DOI: 10.5194/acp-16-1603-2016

Development of a hydrophilic interaction liquid chromatography (HILIC) method for the chemical characterization of water-soluble isoprene epoxydiol (IEPOX)-derived secondary organic aerosol
journal, January 2018

  • Cui, Tianqu; Zeng, Zhexi; dos Santos, Erickson O.
  • Environmental Science: Processes & Impacts, Vol. 20, Issue 11
  • DOI: 10.1039/C8EM00308D

Ambient Measurements of Highly Oxidized Gas-Phase Molecules during the Southern Oxidant and Aerosol Study (SOAS) 2013
journal, May 2018


The Southeastern Aerosol Research and Characterization Study: Part 1—Overview
journal, December 2003

  • Hansen, D. Alan; Edgerton, Eric S.; Hartsell, Benjamin E.
  • Journal of the Air & Waste Management Association, Vol. 53, Issue 12
  • DOI: 10.1080/10473289.2003.10466318

Transition from high- to low-NOx control of night-time oxidation in the southeastern US
journal, June 2017

  • Edwards, P. M.; Aikin, K. C.; Dube, W. P.
  • Nature Geoscience, Vol. 10, Issue 7
  • DOI: 10.1038/ngeo2976

On the Role of Particle Inorganic Mixing State in the Reactive Uptake of N 2 O 5 to Ambient Aerosol Particles
journal, January 2014

  • Ryder, Olivia S.; Ault, Andrew P.; Cahill, John F.
  • Environmental Science & Technology, Vol. 48, Issue 3
  • DOI: 10.1021/es4042622

Fine-particle water and pH in the southeastern United States
journal, January 2015


Viscosity of  -pinene secondary organic material and implications for particle growth and reactivity
journal, April 2013

  • Renbaum-Wolff, L.; Grayson, J. W.; Bateman, A. P.
  • Proceedings of the National Academy of Sciences, Vol. 110, Issue 20
  • DOI: 10.1073/pnas.1219548110

Isoprene-Derived Organosulfates: Vibrational Mode Analysis by Raman Spectroscopy, Acidity-Dependent Spectral Modes, and Observation in Individual Atmospheric Particles
journal, December 2017

  • Bondy, Amy L.; Craig, Rebecca L.; Zhang, Zhenfa
  • The Journal of Physical Chemistry A, Vol. 122, Issue 1
  • DOI: 10.1021/acs.jpca.7b10587

Enhanced formation of isoprene-derived organic aerosol in sulfur-rich power plant plumes during Southeast Nexus: SULFATE AFFECTS ISOPRENE SOA FORMATION
journal, September 2016

  • Xu, Lu; Middlebrook, Ann M.; Liao, Jin
  • Journal of Geophysical Research: Atmospheres, Vol. 121, Issue 18
  • DOI: 10.1002/2016JD025156

Estimates of global terrestrial isoprene emissions using MEGAN (Model of Emissions of Gases and Aerosols from Nature)
journal, January 2006

  • Guenther, A.; Karl, T.; Harley, P.
  • Atmospheric Chemistry and Physics, Vol. 6, Issue 11
  • DOI: 10.5194/acp-6-3181-2006

Kinetics and Products of the Acid-Catalyzed Ring-Opening of Atmospherically Relevant Butyl Epoxy Alcohols
journal, August 2010

  • Eddingsaas, Nathan C.; VanderVelde, David G.; Wennberg, Paul O.
  • The Journal of Physical Chemistry A, Vol. 114, Issue 31
  • DOI: 10.1021/jp103907c

Unexpected Epoxide Formation in the Gas-Phase Photooxidation of Isoprene
journal, August 2009


The Molecular Identification of Organic Compounds in the Atmosphere: State of the Art and Challenges
journal, February 2015

  • Nozière, Barbara; Kalberer, Markus; Claeys, Magda
  • Chemical Reviews, Vol. 115, Issue 10
  • DOI: 10.1021/cr5003485

Chemical Composition of Secondary Organic Aerosol Formed from the Photooxidation of Isoprene
journal, August 2006

  • Surratt, Jason D.; Murphy, Shane M.; Kroll, Jesse H.
  • The Journal of Physical Chemistry A, Vol. 110, Issue 31
  • DOI: 10.1021/jp061734m

Kinetics and Products of the Acid-Catalyzed Ring-Opening of Atmospherically Relevant Butyl Epoxy Alcohols
journal, August 2010

  • Eddingsaas, Nathan C.; VanderVelde, David G.; Wennberg, Paul O.
  • The Journal of Physical Chemistry A, Vol. 114, Issue 31
  • DOI: 10.1021/jp103907c

Gas Phase Production and Loss of Isoprene Epoxydiols
journal, February 2014

  • Bates, Kelvin H.; Crounse, John D.; St. Clair, Jason M.
  • The Journal of Physical Chemistry A, Vol. 118, Issue 7
  • DOI: 10.1021/jp4107958

An amorphous solid state of biogenic secondary organic aerosol particles
journal, October 2010

  • Virtanen, Annele; Joutsensaari, Jorma; Koop, Thomas
  • Nature, Vol. 467, Issue 7317
  • DOI: 10.1038/nature09455

Global distribution of particle phase state in atmospheric secondary organic aerosols
journal, April 2017

  • Shiraiwa, Manabu; Li, Ying; Tsimpidi, Alexandra P.
  • Nature Communications, Vol. 8, Issue 1
  • DOI: 10.1038/ncomms15002

Images reveal that atmospheric particles can undergo liquid-liquid phase separations
journal, July 2012

  • You, Y.; Renbaum-Wolff, L.; Carreras-Sospedra, M.
  • Proceedings of the National Academy of Sciences, Vol. 109, Issue 33
  • DOI: 10.1073/pnas.1206414109

Viscosity of  -pinene secondary organic material and implications for particle growth and reactivity
journal, April 2013

  • Renbaum-Wolff, L.; Grayson, J. W.; Bateman, A. P.
  • Proceedings of the National Academy of Sciences, Vol. 110, Issue 20
  • DOI: 10.1073/pnas.1219548110

On the relationship between aerosol model uncertainty and radiative forcing uncertainty
journal, February 2016

  • Lee, Lindsay A.; Reddington, Carly L.; Carslaw, Kenneth S.
  • Proceedings of the National Academy of Sciences, Vol. 113, Issue 21
  • DOI: 10.1073/pnas.1507050113

Estimating the Viscosity Range of SOA Particles Based on Their Coalescence Time
journal, December 2013


Unexpected Epoxide Formation in the Gas-Phase Photooxidation of Isoprene
journal, August 2009


Diagnosis of venous disease and use of Doppler assessment
journal, April 2013


Effect of relative humidity on SOA formation from isoprene/NO photooxidation: enhancement of 2-methylglyceric acid and its corresponding oligoesters under dry conditions
text, January 2011

  • J., Bapat,; D., Surratt, J.; M., Kamens, R.
  • The University of North Carolina at Chapel Hill University Libraries
  • DOI: 10.17615/c0w3-2907

Effective radiative forcing in the aerosol-climate model CAM5.3-MARC-ARG
text, January 2018


Coupling of organic and inorganic aerosol systems and the effect on gas–particle partitioning in the southeastern US
journal, January 2018

  • Pye, Havala O. T.; Zuend, Andreas; Fry, Juliane L.
  • Atmospheric Chemistry and Physics, Vol. 18, Issue 1
  • DOI: 10.5194/acp-18-357-2018

Predictions of diffusion rates of large organic molecules in secondary organic aerosols using the Stokes–Einstein and fractional Stokes–Einstein relations
journal, January 2019

  • Evoy, Erin; Maclean, Adrian M.; Rovelli, Grazia
  • Atmospheric Chemistry and Physics, Vol. 19, Issue 15
  • DOI: 10.5194/acp-19-10073-2019

Viscosities, diffusion coefficients, and mixing times of intrinsic fluorescent organic molecules in brown limonene secondary organic aerosol and tests of the Stokes–Einstein equation
journal, January 2019

  • Ullmann, Dagny A.; Hinks, Mallory L.; Maclean, Adrian M.
  • Atmospheric Chemistry and Physics, Vol. 19, Issue 3
  • DOI: 10.5194/acp-19-1491-2019

Estimates of global terrestrial isoprene emissions using MEGAN (Model of Emissions of Gases and Aerosols from Nature)
journal, January 2006

  • Guenther, A.; Karl, T.; Harley, P.
  • Atmospheric Chemistry and Physics, Vol. 6, Issue 11
  • DOI: 10.5194/acp-6-3181-2006

Description and evaluation of the Community Multiscale Air Quality (CMAQ) modeling system version 5.1
journal, January 2017

  • Appel, K. Wyat; Napelenok, Sergey L.; Foley, Kristen M.
  • Geoscientific Model Development, Vol. 10, Issue 4
  • DOI: 10.5194/gmd-10-1703-2017