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Title: Speciated measurements of semivolatile and intermediate volatility organic compounds (S/IVOCs) in a pine forest during BEACHON-RoMBAS 2011

Journal Article · · Atmospheric Chemistry and Physics (Online)
 [1];  [2];  [3]; ORCiD logo [4];  [5];  [4];  [6]; ORCiD logo [7];  [8];  [9];  [10];  [11];  [12];  [12];  [4];  [2];  [13]
  1. Univ. of California, Berkeley, CA (United States); Univ. of Toronto, Toronto, ON (Canada)
  2. Aerosol Dynamics Inc., Berkeley, CA (United States)
  3. Aerodyne Research Inc., Billerica, MA (United States); Forschungszentrum Julich, Julich (Germany)
  4. Univ. of Colorado, Boulder, CO (United States)
  5. Univ. of California, Berkeley, CA (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
  6. Univ. of Innsbruck, Innsbruck (Austria); National Center for Atmospheric Research, Boulder, CO (United States)
  7. National Center for Atmospheric Research, Boulder, CO (United States)
  8. Univ. of Innsbruck, Innsbruck (Austria)
  9. Aerosol Dynamics Inc., Berkeley, CA (United States); California Institute of Technology, Pasadena, CA (United States)
  10. Univ. of California, Berkeley, CA (United States); California Air Resources Board, Sacramento, CA (United States)
  11. Aerodyne Research Inc., Billerica, MA (United States); Univ. of Colorado, Boulder, CO (United States)
  12. Aerodyne Research Inc., Billerica, MA (United States)
  13. Univ. of California, Berkeley, CA (United States)

Understanding organic composition of gases and particles is essential to identifying sources and atmospheric processing leading to organic aerosols (OA), but atmospheric chemical complexity and the analytical techniques available often limit such analysis. Here we present speciated measurements of semivolatile and intermediate volatility organic compounds (S/IVOCs) using a novel dual-use instrument (SV-TAG-AMS) deployed at Manitou Forest, CO, during the Bio-hydro-atmosphere interactions of Energy, Aerosols, Carbon, H2O, Organics & Nitrogen – Rocky Mountain Biogenic Aerosol Study (BEACHON-RoMBAS) 2011 campaign. This instrument provides on-line speciation of ambient organic compounds with 2 h time resolution. The species in this volatility range are complex in composition, but their chemical identities reveal potential sources. Observed compounds of biogenic origin include sesquiterpenes with molecular formula C15H24 (e.g., β-caryophyllene and longifolene), which were most abundant at night. A variety of other biogenic compounds were observed, including sesquiterpenoids with molecular formula C15H22, abietatriene and other terpenoid compounds. Many of these compounds have been identified in essential oils and branch enclosure studies but were observed in ambient air for the first time in our study. Semivolatile polycyclic aromatic hydrocarbons (PAHs) and alkanes were observed with highest concentrations during the day and the dependence on temperature suggests the role of an evaporative source. Using statistical analysis by positive matrix factorization (PMF), we classify observed S/IVOCs by their likely sources and processes, and characterize them based on chemical composition. The total mass concentration of elutable S/IVOCs was estimated to be on the order of 0.7 µg m–3 and their volatility distributions are estimated for modeling aerosol formation chemistry.

Research Organization:
Aerodyne Research, Inc., Billerica, MA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-08ER85160
OSTI ID:
1253625
Journal Information:
Atmospheric Chemistry and Physics (Online), Vol. 16, Issue 2; ISSN 1680-7324
Publisher:
European Geosciences UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (8)

Comprehensive characterization of atmospheric organic carbon at a forested site journal September 2017
Chemical evolution of atmospheric organic carbon over multiple generations of oxidation journal February 2018
Terpene Composition Complexity Controls Secondary Organic Aerosol Yields from Scots Pine Volatile Emissions journal February 2018
Analysis of indoor particles and gases and their evolution with natural ventilation journal July 2019
In situ secondary organic aerosol formation from ambient pine forest air using an oxidation flow reactor journal January 2016
Observations of sesquiterpenes and their oxidation products in central Amazonia during the wet and dry seasons journal January 2018
Secondary organic aerosol formation from ambient air in an oxidation flow reactor in central Amazonia journal January 2018
In situ secondary organic aerosol formation from ambient pine forest air using an oxidation flow reactor journal January 2015

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