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Title: Understanding atmospheric organic aerosols via factor analysis of aerosol mass spectrometry: a review

Journal Article · · Analytical and Bioanalytical Chemistry
 [1];  [2];  [3];  [4];  [5];  [5];  [1]
  1. Univ. of California, Davis, CA (United States). Dept. of Envrionmental Toxicology
  2. Univ. of Colorado, Boulder, CO (United States). Dept. of Chemistry and Biochemistry; Univ. of Colorado, Boulder, CO (United States). Cooperative Inst. for Research in Environmental Sciences
  3. Aerodyne Research, Inc, Billerica, MA (United States)
  4. Univ. of Colorado, Boulder, CO (United States). Dept. of Chemistry and Biochemistry
  5. Aerodyne Research, Inc, Billerica, MA (United States)

Organic species are an important but poorly characterized constituent of airborne particulate matter. A quantitative understanding of the organic fraction of particles (organic aerosol, OA) is necessary to reduce some of the largest uncertainties that confound the assessment of the radiative forcing of climate and air quality management policies. In recent years, aerosol mass spectrometry has been increasingly relied upon for highly time-resolved characterization of OA chemistry and for elucidation of aerosol sources and lifecycle processes. Aerodyne aerosol mass spectrometers (AMS) are particularly widely used, because of their ability to quantitatively characterize the size-resolved composition of submicron particles (PM1). AMS report the bulk composition and temporal variations of OA in the form of ensemble mass spectra (MS) acquired over short time intervals. Because each MS represents the linear superposition of the spectra of individual components weighed by their concentrations, multivariate factor analysis of the MS matrix has proved effective at retrieving OA factors that offer a quantitative and simplified description of the thousands of individual organic species. The sum of the factors accounts for nearly 100% of the OA mass and each individual factor typically corresponds to a large group of OA constituents with similar chemical composition and temporal behavior that are characteristic of different sources and/or atmospheric processes. The application of this technique in aerosol mass spectrometry has grown rapidly in the last six years. Here we review multivariate factor analysis techniques applied to AMS and other aerosol mass spectrometers, and summarize key findings from field observations. Results that provide valuable information about aerosol sources and, in particular, secondary OA evolution on regional and global scales are highlighted. Advanced methods, for example a-priori constraints on factor mass spectra and the application of factor analysis to combined aerosol and gas phase data are discussed. Integrated analysis of worldwide OA factors is used to present a holistic regional and global description of OA. Finally, different ways in which OA factors can constrain global and regional models are discussed.

Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
Grant/Contract Number:
FG02-08ER64627; SC0007178; SC0002191; SC0006035; FG02-11ER65293; FGOZO5ER63982; ATM-0919189; ATM-0528170; NAo80AR4310565; NA05OAR3410102; AB133R04SE0480; RA1330-02-SE-0150
OSTI ID:
1816656
Journal Information:
Analytical and Bioanalytical Chemistry, Vol. 401, Issue 10; ISSN 1618-2642
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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Insights into atmospheric oxidation processes by performing factor analyses on subranges of mass spectra journal May 2020
Sources and atmospheric dynamics of organic aerosol in New Delhi, India: insights from receptor modeling journal January 2020
A 1-year characterization of organic aerosol composition and sources using an extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF) journal January 2020
Interactive comment on “Variations in the chemical composition of the submicron aerosol and in the sources of the organic fraction at a regional background site of the Po Valley (Italy)” by M. Bressi et al. posted_content July 2016
Open burning of rice, corn and wheat straws: primary emissions, photochemical aging, and secondary organic aerosol formation journal August 2017
Interactive comment on “Characterization of nighttime formation of particulate organic nitrates based on high-resolution aerosol mass spectrometry in an urban atmosphere in China” by Kuangyou Yu et al. posted_content January 2019
Source apportionment of the submicron organic aerosols over the Atlantic Ocean from 53°N to 53°S using HR-ToF-AMS posted_content March 2018
Free Tropospheric Aerosols at the Mt. Bachelor Observatory: More Oxidized and Higher Sulfate Content Compared to Boundary Layer Aerosols journal September 2018
Supporting Information for Significant source of secondary aerosol: formation from gasoline evaporation emissions in the presence of SO2 and NH3 preprint
Seasonal variations in the highly time-resolved aerosol composition, sources and chemical processes of background submicron particles in the North China Plain journal March 2021
Wintertime aerosol chemical composition and source apportionment of the organic fraction in the metropolitan area of Paris journal January 2012
Submicron particles influenced by mixed biogenic and anthropogenic emissions: high-resolution aerosol mass spectrometry results from the Carbonaceous Aerosols and Radiative Effects Study (CARES) posted_content February 2012
Diesel-related hydrocarbons can dominate gas phase reactive carbon in megacities posted_content March 2015
Characterization of anthropogenic organic aerosols by TOF-ACSM with the new capture vaporizer journal January 2020
Improved source apportionment of organic aerosolsin complex urban air pollution using the multilinear engine (ME-2) posted_content October 2017
Comparison of dimension reduction techniques in the analysis of mass spectrometry data posted_content November 2019
Application of mobile aerosol and trace gas measurements for the investigation of megacity air pollution emissions: the Paris metropolitan area posted_content August 2013
ACTRIS ACSM intercomparison – Part 2: Intercomparison of ME-2 organic source apportionment results from 15 individual, co-located aerosol mass spectrometers journal January 2015
Modeling regional air quality and climate: improving organic aerosol and aerosol activation processes in WRF/Chem version 3.7.1 journal January 2017
Composition and origin of PM$_{2.5}$ aerosol particles in the upper Rhine valley in summer text January 2019
Characterization and source apportionment of organic aerosol using offline aerosol mass spectrometry text January 2016
Wintertime organic and inorganic aerosols in Lanzhou, China: sources, processes, and comparison with the results during summer text January 2016