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Title: Lability of secondary organic particulate matter

Abstract

Accurate simulations of the consenctrations of atmospheric organic particulate matter (PM) are needed for predicting energy flow in the Earth’s climate system. In the past, simulations of organic PM widely assume equilibrium partitioning of semivolatile organic compounds (SVOCs) between the PM and surrounding vapor. Herein, we test this assumption by measuring evaporation rates and associated vapor mass concentration of organic films representative of atmospheric PM. For films representing anthropogenic PM, evaporation rates and vapor mass concentrations increased above a threshold relative humidity (RH), indicating equilibrium partitioning above a transition RH but not below. In contrast for films representing biogenic PM, no threshold was observed, indicating equilibrium partitioning at all RHs. The results suggest that the mass lability of atmospheric organic PM can differ in consequential ways among Earth’s natural biomes, polluted regions, and regions of land-use change, and these differences need to be considered when simulating atmospheric organic PM.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6]; ORCiD logo [7]
  1. Harvard Univ., Cambridge, MA (United States). John A. Paulson School of Engineering and Applied Sciences
  2. Harvard Univ., Cambridge, MA (United States). John A. Paulson School of Engineering and Applied Sciences ; University of Macau (China). Department of Civil and Environmental Engineering, Faculty of Science and Technology
  3. Harvard Univ., Cambridge, MA (United States). John A. Paulson School of Engineering and Applied Sciences ; Harvard University, Boston, MA (United States). T. H. Chan School of Public Health
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Chemical Sciences Division
  5. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Atmospheric Sciences and Global Change Division
  6. University of British Columbia, Vancouver, BC (Canada). Department of Chemistry
  7. Harvard Univ., Cambridge, MA (United States). John A. Paulson School of Engineering and Applied Sciences and Department of Earth and Planetary Sciences
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1377574
Alternate Identifier(s):
OSTI ID: 1340828
Report Number(s):
PNNL-SA-115585
Journal ID: ISSN 0027-8424; ark:/13030/qt2cb5j6ng
Grant/Contract Number:  
AC02-05CH11231; AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 113; Journal Issue: 45; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 59 BASIC BIOLOGICAL SCIENCES; 54 ENVIRONMENTAL SCIENCES; atmospheric chemistry; secondary organic aerosol; evaporation

Citation Formats

Liu, Pengfei, Li, Yong Jie, Wang, Yan, Gilles, Mary K., Zaveri, Rahul A., Bertram, Allan K., and Martin, Scot T. Lability of secondary organic particulate matter. United States: N. p., 2016. Web. doi:10.1073/pnas.1603138113.
Liu, Pengfei, Li, Yong Jie, Wang, Yan, Gilles, Mary K., Zaveri, Rahul A., Bertram, Allan K., & Martin, Scot T. Lability of secondary organic particulate matter. United States. https://doi.org/10.1073/pnas.1603138113
Liu, Pengfei, Li, Yong Jie, Wang, Yan, Gilles, Mary K., Zaveri, Rahul A., Bertram, Allan K., and Martin, Scot T. Mon . "Lability of secondary organic particulate matter". United States. https://doi.org/10.1073/pnas.1603138113. https://www.osti.gov/servlets/purl/1377574.
@article{osti_1377574,
title = {Lability of secondary organic particulate matter},
author = {Liu, Pengfei and Li, Yong Jie and Wang, Yan and Gilles, Mary K. and Zaveri, Rahul A. and Bertram, Allan K. and Martin, Scot T.},
abstractNote = {Accurate simulations of the consenctrations of atmospheric organic particulate matter (PM) are needed for predicting energy flow in the Earth’s climate system. In the past, simulations of organic PM widely assume equilibrium partitioning of semivolatile organic compounds (SVOCs) between the PM and surrounding vapor. Herein, we test this assumption by measuring evaporation rates and associated vapor mass concentration of organic films representative of atmospheric PM. For films representing anthropogenic PM, evaporation rates and vapor mass concentrations increased above a threshold relative humidity (RH), indicating equilibrium partitioning above a transition RH but not below. In contrast for films representing biogenic PM, no threshold was observed, indicating equilibrium partitioning at all RHs. The results suggest that the mass lability of atmospheric organic PM can differ in consequential ways among Earth’s natural biomes, polluted regions, and regions of land-use change, and these differences need to be considered when simulating atmospheric organic PM.},
doi = {10.1073/pnas.1603138113},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 45,
volume = 113,
place = {United States},
year = {Mon Oct 24 00:00:00 EDT 2016},
month = {Mon Oct 24 00:00:00 EDT 2016}
}

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