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Title: New Particle Formation and Growth in an Isoprene-Dominated Ozark Forest: From Sub-5 nm to CCN-Active Sizes

Abstract

Particle Investigations at a Northern Ozarks Tower: NOx, Oxidant, Isoprene Research (PINOT NOIR) were conducted in a Missouri forest dominated by isoprene emissions from the period of May to October 2012. This study presents results of new particle formation (NPF) and the growth of new particles to cloud condensation nuclei (CCN)-active sizes (~100 nm) observed during this field campaign. The measured sub-5 nm particles were up to ~20,000 cm -3 during a typical NPF event. Nucleation rates J1 were relatively high (11.0 ± 10.6 cm -3 s -1), and one order of magnitude higher than formation rates of 5 nm particles (J5). Sub-5 nm particle formation events were observed during 64% of measurement days, with a high preference in biogenic volatile organic compounds (BVOCs)- and SO2-poor northwesterly (90%) air masses than in BVOCs-rich southerly air masses (13%). About 80% of sub-5 nm particle events led to the further growth. While high temperatures and high aerosol loadings in the southerly air masses were not favorable for nucleation, high BVOCs in the southerly air masses facilitated the growth of new particles to CCN-active sizes. In overall, 0.4–9.4% of the sub-5 nm particles grew to CCN-active sizes within each single NPF event. Duringmore » a regional NPF event period that took place consecutively over several days, concentrations of CCN size particles increased by a factor of 4.7 in average. This enhanced production of CCN particles from new particles was commonly observed during all 13 regional NPF events during the campaign period.« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [11];  [8];  [12];  [13];  [6]
  1. Nanjing Univ. of Information Science and Technology (China); Kent State Univ., Kent, OH (United States)
  2. National Center for Atmospheric Research, Boulder, CO (United States)
  3. National Center for Atmospheric Research, Boulder, CO (United States); Univ. of Eastern Finland, Kuopio (Finland)
  4. Washington State Univ., Pullman, WA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  5. Indian Inst. of Technology (IIT), Kanpur (India)
  6. Kent State Univ., Kent, OH (United States)
  7. Kent State Univ., Kent, OH (United States); Case Western Reserve Univ., Cleveland, OH (United States)
  8. Univ. of Missouri, Columbia, MO (United States)
  9. Univ. of Innsbruck (Austria)
  10. National Center for Atmospheric Research, Boulder, CO (United States); Univ. of California, Irvine, CA (United States)
  11. US Environmental Protection Agency (EPA), Durham, NC (United States)
  12. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  13. AirModus, Helsinki (Finland)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1265744
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Aerosol Science and Technology
Additional Journal Information:
Journal Volume: 48; Journal Issue: 12; Journal ID: ISSN 0278-6826
Publisher:
American Association for Aerosol Research
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Yu, Huan, Ortega, John, Smith, James N., Guenther, Alex B., Kanawade, V. P., You, Yi, Liu, Yiying, Hosman, Kevin, Karl, Thomas, Seco, Roger, Geron, Chris, Pallardy, Stephen G., Gu, Lianhong, Mikkilä, Jyri, and Lee, Shan-Hu. New Particle Formation and Growth in an Isoprene-Dominated Ozark Forest: From Sub-5 nm to CCN-Active Sizes. United States: N. p., 2014. Web. doi:10.1080/02786826.2014.984801.
Yu, Huan, Ortega, John, Smith, James N., Guenther, Alex B., Kanawade, V. P., You, Yi, Liu, Yiying, Hosman, Kevin, Karl, Thomas, Seco, Roger, Geron, Chris, Pallardy, Stephen G., Gu, Lianhong, Mikkilä, Jyri, & Lee, Shan-Hu. New Particle Formation and Growth in an Isoprene-Dominated Ozark Forest: From Sub-5 nm to CCN-Active Sizes. United States. https://doi.org/10.1080/02786826.2014.984801
Yu, Huan, Ortega, John, Smith, James N., Guenther, Alex B., Kanawade, V. P., You, Yi, Liu, Yiying, Hosman, Kevin, Karl, Thomas, Seco, Roger, Geron, Chris, Pallardy, Stephen G., Gu, Lianhong, Mikkilä, Jyri, and Lee, Shan-Hu. Fri . "New Particle Formation and Growth in an Isoprene-Dominated Ozark Forest: From Sub-5 nm to CCN-Active Sizes". United States. https://doi.org/10.1080/02786826.2014.984801.
@article{osti_1265744,
title = {New Particle Formation and Growth in an Isoprene-Dominated Ozark Forest: From Sub-5 nm to CCN-Active Sizes},
author = {Yu, Huan and Ortega, John and Smith, James N. and Guenther, Alex B. and Kanawade, V. P. and You, Yi and Liu, Yiying and Hosman, Kevin and Karl, Thomas and Seco, Roger and Geron, Chris and Pallardy, Stephen G. and Gu, Lianhong and Mikkilä, Jyri and Lee, Shan-Hu},
abstractNote = {Particle Investigations at a Northern Ozarks Tower: NOx, Oxidant, Isoprene Research (PINOT NOIR) were conducted in a Missouri forest dominated by isoprene emissions from the period of May to October 2012. This study presents results of new particle formation (NPF) and the growth of new particles to cloud condensation nuclei (CCN)-active sizes (~100 nm) observed during this field campaign. The measured sub-5 nm particles were up to ~20,000 cm-3 during a typical NPF event. Nucleation rates J1 were relatively high (11.0 ± 10.6 cm-3 s-1), and one order of magnitude higher than formation rates of 5 nm particles (J5). Sub-5 nm particle formation events were observed during 64% of measurement days, with a high preference in biogenic volatile organic compounds (BVOCs)- and SO2-poor northwesterly (90%) air masses than in BVOCs-rich southerly air masses (13%). About 80% of sub-5 nm particle events led to the further growth. While high temperatures and high aerosol loadings in the southerly air masses were not favorable for nucleation, high BVOCs in the southerly air masses facilitated the growth of new particles to CCN-active sizes. In overall, 0.4–9.4% of the sub-5 nm particles grew to CCN-active sizes within each single NPF event. During a regional NPF event period that took place consecutively over several days, concentrations of CCN size particles increased by a factor of 4.7 in average. This enhanced production of CCN particles from new particles was commonly observed during all 13 regional NPF events during the campaign period.},
doi = {10.1080/02786826.2014.984801},
url = {https://www.osti.gov/biblio/1265744}, journal = {Aerosol Science and Technology},
issn = {0278-6826},
number = 12,
volume = 48,
place = {United States},
year = {2014},
month = {10}
}

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