Evidence for Diverse Biogeochemical Drivers of Boreal Forest New Particle Formation. Lawler, M., J., Rissanen, M., P., Ehn, M., Mauldin, R., L., Sarnela, N., Sipilä, M., & Smith, J., N. Geophysical Research Letters, 45(4):2038-2046, AMER GEOPHYSICAL UNION, 2, 2018.
doi  abstract   bibtex   
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.
@article{
 title = {Evidence for Diverse Biogeochemical Drivers of Boreal Forest New Particle Formation},
 type = {article},
 year = {2018},
 keywords = {aerosol,atmospheric chemistry,boreal forest,marine,new particle formation,nucleation},
 pages = {2038-2046},
 volume = {45},
 month = {2},
 publisher = {AMER GEOPHYSICAL UNION},
 city = {2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA},
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 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.},
 bibtype = {article},
 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.},
 doi = {10.1002/2017GL076394},
 journal = {Geophysical Research Letters},
 number = {4}
}

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