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

Chan, A. W. H. and Kreisberg, N. M. and Hohaus, T. and Campuzano-Jost, P. and Zhao, Y. and Day, D. A. and Kaser, L. and Karl, T. and Hansel, A. and Teng, A. P. and Ruehl, C. R. and Sueper, D. T. and Jayne, J. T. and Worsnop, D. R. and Jimenez, J. L. and Hering, S. V. and Goldstein, A. H. (2016) Speciated measurements of semivolatile and intermediate volatility organic compounds (S/IVOCs) in a pine forest during BEACHON-RoMBAS 2011. Atmospheric Chemistry and Physics, 16 (2). pp. 1187-1205. ISSN 1680-7324.

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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, H_2O, 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 C_(15)H_(24) (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 C_(15)H_(22), 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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Chan, A. W. H.0000-0001-7392-4237
Campuzano-Jost, P.0000-0003-3930-010X
Day, D. A.0000-0003-3213-4233
Worsnop, D. R.0000-0002-8928-8017
Jimenez, J. L.0000-0001-6203-1847
Goldstein, A. H.0000-0003-4014-4896
Additional Information:© 2016 Author(s). CC Attribution 3.0 License. Published by Copernicus Publications on behalf of the European Geosciences Union. Received: 14 Jul 2015. Published in Atmos. Chem. Phys. Discuss.: 20 Aug 2015. Revised: 22 Dec 2015. Accepted: 13 Jan 2016. Published: 02 Feb 2016. The authors would like to acknowledge funding from the National Science Foundation (Rapid Award Number 1135745), Department of Energy (SBIR Award Number DE-FG02-08ER85160) and the Austrian Science Fund (FWF project number L518-N20). The authors would like to thank Andrew Turnipseed for use of trace gas and meteorological measurements and Brett Palm, Amber Ortega, and Patrick Hayes for use of AMS measurements. The authors would also like to thank Jim Smith, John Ortega, and NCAR for organizing the logistics of BEACHON-RoMBAS 2011. P. Campuzano-Jost, D. A. Day, and J. L. Jimenez were supported by NSF AGS-1243354, NOAA NA13OAR4310063, and DOE(BER/ASR) DE-SC0011105. L. Kaser is a recipient of a DOC-fFORTE Fellowship of the Austrian Academy of Science. Edited by: J. Rinne.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-08ER85160
FWF Der WissenschaftsfondsL518-N20
National Oceanic and Atmospheric Administration (NOAA)NA13OAR4310063
Department of Energy (DOE)DE-SC0011105
Österreichische Akademie der WissenschaftenUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20160325-144844698
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Official Citation:Chan, A. W. H., Kreisberg, N. M., Hohaus, T., Campuzano-Jost, P., Zhao, Y., Day, D. A., Kaser, L., Karl, T., Hansel, A., Teng, A. P., Ruehl, C. R., Sueper, D. T., Jayne, J. T., Worsnop, D. R., Jimenez, J. L., Hering, S. V., and Goldstein, A. H.: Speciated measurements of semivolatile and intermediate volatility organic compounds (S/IVOCs) in a pine forest during BEACHON-RoMBAS 2011, Atmos. Chem. Phys., 16, 1187-1205, doi:10.5194/acp-16-1187-2016, 2016.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65690
Deposited By: Ruth Sustaita
Deposited On:29 Mar 2016 22:35
Last Modified:09 Mar 2020 13:18

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