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Title: Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site

Abstract

Most prior field studies of new particle formation (NPF) have been performed at or near ground level, leaving many unanswered questions regarding the vertical extent of NPF. To address this, we measured concentrations of 11–16 nm diameter particles from ground level to 1000 m during the 2013New Particle Formation Study at the Atmospheric Radiation Measurement Southern Great Plains site in Lamont, Oklahoma. The measurements were performed using a tethered balloon carrying two condensation particle counters that were configured for two different particle cut-off diameters.These observations were compared to data from three scanning mobility particle sizers at the ground level. We observed that 11–16 nm diameter particles were generated at the top region of the boundary layer, and were then rapidly mixed throughout the boundary layer. Here we also estimate liquid water content of nanoparticles using ground-based measurements of particle hygroscopicity obtained with a Humidified Tandem Differential Mobility Analyzer and vertically resolved relative humidity (RH) and temperature measured with a Raman lidar. Our analyses of these observations lead to the following conclusions regarding nanoparticles formed during NPF events at this site: (1) ground-based observations may not always accurately represent the timing, distribution, and meteorological conditions associated with the onset of NPF; (2) nanoparticlesmore » are highly hygroscopic and typically contain up to 50 % water by volume, and during conditions of high RH combined with high particle hygroscopicity, particles can be up to 95 % water by volume;(3) increased liquid water content of nanoparticles at high RH greatly enhances the partitioning of water-soluble species like organic acids into ambient nanoparticles.« less

Authors:
 [1]; ORCiD logo [2];  [3];  [3];  [4]; ORCiD logo [1]; ORCiD logo [2];  [5]; ORCiD logo [1]
  1. Univ. of California, Irvine, CA (United States)
  2. Colorado State Univ., Fort Collins, CO (United States)
  3. National Center for Atmospheric Research, Boulder, CO (United States)
  4. Univ. of Minnesota-Twin Cities, Minneapolis, MN (United States)
  5. Augsburg Univ., Minneapolis, MN (United States)
Publication Date:
Research Org.:
Colorado State Univ., Fort Collins, CO (United States); Univ. of California, Irvine, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1502078
Grant/Contract Number:  
SC0011780; SC0014469
Resource Type:
Accepted Manuscript
Journal Name:
Atmospheric Chemistry and Physics (Online)
Additional Journal Information:
Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 18; Journal Issue: 1; Journal ID: ISSN 1680-7324
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Chen, Haihan, Hodshire, Anna L., Ortega, John, Greenberg, James, McMurry, Peter H., Carlton, Annmarie G., Pierce, Jeffrey R., Hanson, Dave R., and Smith, James N. Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site. United States: N. p., 2018. Web. doi:10.5194/acp-18-311-2018.
Chen, Haihan, Hodshire, Anna L., Ortega, John, Greenberg, James, McMurry, Peter H., Carlton, Annmarie G., Pierce, Jeffrey R., Hanson, Dave R., & Smith, James N. Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site. United States. doi:10.5194/acp-18-311-2018.
Chen, Haihan, Hodshire, Anna L., Ortega, John, Greenberg, James, McMurry, Peter H., Carlton, Annmarie G., Pierce, Jeffrey R., Hanson, Dave R., and Smith, James N. Thu . "Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site". United States. doi:10.5194/acp-18-311-2018. https://www.osti.gov/servlets/purl/1502078.
@article{osti_1502078,
title = {Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site},
author = {Chen, Haihan and Hodshire, Anna L. and Ortega, John and Greenberg, James and McMurry, Peter H. and Carlton, Annmarie G. and Pierce, Jeffrey R. and Hanson, Dave R. and Smith, James N.},
abstractNote = {Most prior field studies of new particle formation (NPF) have been performed at or near ground level, leaving many unanswered questions regarding the vertical extent of NPF. To address this, we measured concentrations of 11–16 nm diameter particles from ground level to 1000 m during the 2013New Particle Formation Study at the Atmospheric Radiation Measurement Southern Great Plains site in Lamont, Oklahoma. The measurements were performed using a tethered balloon carrying two condensation particle counters that were configured for two different particle cut-off diameters.These observations were compared to data from three scanning mobility particle sizers at the ground level. We observed that 11–16 nm diameter particles were generated at the top region of the boundary layer, and were then rapidly mixed throughout the boundary layer. Here we also estimate liquid water content of nanoparticles using ground-based measurements of particle hygroscopicity obtained with a Humidified Tandem Differential Mobility Analyzer and vertically resolved relative humidity (RH) and temperature measured with a Raman lidar. Our analyses of these observations lead to the following conclusions regarding nanoparticles formed during NPF events at this site: (1) ground-based observations may not always accurately represent the timing, distribution, and meteorological conditions associated with the onset of NPF; (2) nanoparticles are highly hygroscopic and typically contain up to 50 % water by volume, and during conditions of high RH combined with high particle hygroscopicity, particles can be up to 95 % water by volume;(3) increased liquid water content of nanoparticles at high RH greatly enhances the partitioning of water-soluble species like organic acids into ambient nanoparticles.},
doi = {10.5194/acp-18-311-2018},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 1,
volume = 18,
place = {United States},
year = {2018},
month = {1}
}

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Works referenced in this record:

Amazon boundary layer aerosol concentration sustained by vertical transport during rainfall
journal, October 2016

  • Wang, Jian; Krejci, Radovan; Giangrande, Scott
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