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Title: Evidence for Diverse Biogeochemical Drivers of Boreal Forest New Particle Formation

Abstract

New particle formation (NPF) is an important contributor to particle number in many locations, but the chemical drivers for this process are not well understood. Daytime NPF events occur regularly in the springtime Finnish boreal forest and strongly impact aerosol abundance. In April 2014 size-resolved chemical measurements of ambient nanoparticles were made using the Time-of-Flight Thermal Desorption Chemical ionization Mass Spectrometer and we report results from two NPF events. While growth overall was dominated by terpene oxidation products, newly formed 20–70 nm particles showed enhancement in apparent alkanoic acids. The events occurred on days with rapid transport of marine air, which correlated with low background aerosol loading and higher gas phase methanesulfonic acid levels. These results are broadly consistent with previous studies on Nordic NPF but indicate that further attention should be given to the sources and role of non-terpenoid organics and the possible contribution of transported marine compounds in this process.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [3]; ORCiD logo [2];  [2]; ORCiD logo [1]
  1. Univ. of California, Irvine, CA (United States)
  2. Univ. of Helsinki (Finland)
  3. Univ. of Helsinki (Finland); Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Research Org.:
Univ. of California, Irvine, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1537307
Alternate Identifier(s):
OSTI ID: 1422022
Grant/Contract Number:  
SC0014469
Resource Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 45; Journal Issue: 4; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Geology

Citation Formats

Lawler, Michael J., Rissanen, Matti P., Ehn, Mikael, Mauldin, R. Lee, Sarnela, Nina, Sipilä, Mikko, and Smith, James N. Evidence for Diverse Biogeochemical Drivers of Boreal Forest New Particle Formation. United States: N. p., 2018. Web. doi:10.1002/2017gl076394.
Lawler, Michael J., Rissanen, Matti P., Ehn, Mikael, Mauldin, R. Lee, Sarnela, Nina, Sipilä, Mikko, & Smith, James N. Evidence for Diverse Biogeochemical Drivers of Boreal Forest New Particle Formation. United States. doi:10.1002/2017gl076394.
Lawler, Michael J., Rissanen, Matti P., Ehn, Mikael, Mauldin, R. Lee, Sarnela, Nina, Sipilä, Mikko, and Smith, James N. Mon . "Evidence for Diverse Biogeochemical Drivers of Boreal Forest New Particle Formation". United States. doi:10.1002/2017gl076394. https://www.osti.gov/servlets/purl/1537307.
@article{osti_1537307,
title = {Evidence for Diverse Biogeochemical Drivers of Boreal Forest New Particle Formation},
author = {Lawler, Michael J. and Rissanen, Matti P. and Ehn, Mikael and Mauldin, R. Lee and Sarnela, Nina and Sipilä, Mikko and Smith, James N.},
abstractNote = {New particle formation (NPF) is an important contributor to particle number in many locations, but the chemical drivers for this process are not well understood. Daytime NPF events occur regularly in the springtime Finnish boreal forest and strongly impact aerosol abundance. In April 2014 size-resolved chemical measurements of ambient nanoparticles were made using the Time-of-Flight Thermal Desorption Chemical ionization Mass Spectrometer and we report results from two NPF events. While growth overall was dominated by terpene oxidation products, newly formed 20–70 nm particles showed enhancement in apparent alkanoic acids. The events occurred on days with rapid transport of marine air, which correlated with low background aerosol loading and higher gas phase methanesulfonic acid levels. These results are broadly consistent with previous studies on Nordic NPF but indicate that further attention should be given to the sources and role of non-terpenoid organics and the possible contribution of transported marine compounds in this process.},
doi = {10.1002/2017gl076394},
journal = {Geophysical Research Letters},
number = 4,
volume = 45,
place = {United States},
year = {2018},
month = {2}
}

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