Size-resolved aerosol at a Coastal Great Lakes Site: Impacts of new particle formation and lake spray.

Autor: Christiansen MB; Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa, United States of America., Stanier CO; Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa, United States of America., Hughes DD; Department of Chemistry, University of Iowa, Iowa City, Iowa, United States of America., Stone EA; Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa, United States of America.; Department of Chemistry, University of Iowa, Iowa City, Iowa, United States of America., Pierce RB; Space Science and Engineering Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America., Oleson JJ; Department of Biostatistics, University of Iowa, Iowa City, Iowa, United States of America., Elzey S; TSI Incorporated, Shoreview, Minnesota, United States of America.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2024 Apr 04; Vol. 19 (4), pp. e0300050. Date of Electronic Publication: 2024 Apr 04 (Print Publication: 2024).
DOI: 10.1371/journal.pone.0300050
Abstrakt: The quantification of aerosol size distributions is crucial for understanding the climate and health impacts of aerosols, validating models, and identifying aerosol sources. This work provides one of the first continuous measurements of aerosol size distribution from 1.02 to 8671 nm near the shore of Lake Michigan. The data were collected during the Lake Michigan Ozone Study (LMOS 2017), a comprehensive air quality measurement campaign in May and June 2017. The time-resolved (2-min) size distribution are reported herein alongside meteorology, remotely sensed data, gravimetric filters, and gas-phase variables. Mean concentrations of key aerosol parameters include PM2.5 (6.4 μg m-3), number from 1 to 3 nm (1.80x104 cm-3) and number greater than 3 nm (8x103 cm-3). During the field campaign, approximately half of days showed daytime ultrafine burst events, characterized by particle growth from sub 10 nm to 25-100 nm. A specific investigation of ultrafine lake spray aerosol was conducted due to enhanced ultrafine particles in onshore flows coupled with sustained wave breaking conditions during the campaign. Upon closer examination, the relationships between the size distribution, wind direction, wind speed, and wave height did not qualitatively support ultrafine particle production from lake spray aerosol; statistical analysis of particle number and wind speed also failed to show a relationship. The alternative hypothesis of enhanced ultrafine particles in onshore flow originating mainly from new particle formation activity is supported by multiple lines of evidence.
Competing Interests: The authors have declared that no competing interests exist.
(Copyright: © 2024 Christiansen et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje