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Hygroscopic properties of smoke-generated organic aerosol particles emitted in the marine atmosphere

Wonaschütz, A. and Coggon, M. M. and Sorooshian, A. and Modini, R. and Frossard, A. A. and Ahlm, L. and Mülmenstädt, J. and Roberts, G. C. and Russell, L. M. and Dey, S. and Brechtel, F. J. and Seinfeld, J. H. (2013) Hygroscopic properties of smoke-generated organic aerosol particles emitted in the marine atmosphere. Atmospheric Chemistry and Physics, 13 (19). pp. 9819-9835. ISSN 1680-7316. https://resolver.caltech.edu/CaltechAUTHORS:20131118-100634113

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Abstract

During the Eastern Pacific Emitted Aerosol Cloud Experiment (E-PEACE), a plume of organic aerosol was produced by a smoke generator and emitted into the marine atmosphere from aboard the R/V Point Sur. In this study, the hygroscopic properties and the chemical composition of the plume were studied at plume ages between 0 and 4 h in different meteorological conditions. In sunny conditions, the plume particles had very low hygroscopic growth factors (GFs): between 1.05 and 1.09 for 30 nm and between 1.02 and 1.1 for 150 nm dry size at a relative humidity (RH) of 92%, contrasted by an average marine background GF of 1.6. New particles were produced in large quantities (several 10 000 cm^−3), which lead to substantially increased cloud condensation nuclei (CCN) concentrations at supersaturations between 0.07 and 0.88%. Ratios of oxygen to carbon (O : C) and water-soluble organic mass (WSOM) increased with plume age: from < 0.001 to 0.2, and from 2.42 to 4.96 μg m^−3, respectively, while organic mass fractions decreased slightly (~ 0.97 to ~ 0.94). High-resolution aerosol mass spectrometer (AMS) spectra show that the organic fragment m/z 43 was dominated by C_(2)H_(3)O^+ in the small, new particle mode and by C_(3)H_(7)^+ in the large particle mode. In the marine background aerosol, GFs for 150 nm particles at 40% RH were found to be enhanced at higher organic mass fractions: an average GF of 1.06 was observed for aerosols with an organic mass fraction of 0.53, and a GF of 1.04 for an organic mass fraction of 0.35.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.5194/acp-13-9819-2013DOIArticle
http://www.atmos-chem-phys.net/13/9819/2013/acp-13-9819-2013.htmlPublisherArticle
ORCID:
AuthorORCID
Coggon, M. M.0000-0002-5763-1925
Sorooshian, A.0000-0002-2243-2264
Modini, R.0000-0002-2982-1369
Frossard, A. A.0000-0002-5728-0854
Mülmenstädt, J.0000-0003-1105-6678
Roberts, G. C.0000-0002-3636-8590
Russell, L. M.0000-0002-6108-2375
Seinfeld, J. H.0000-0003-1344-4068
Additional Information:© Author(s) 2013. This work is distributed under the Creative Commons Attribution 3.0 License. Published by Copernicus Publications on behalf of the European Geosciences Union. Received: 15 April 2013; Published in Atmos. Chem. Phys. Discuss.: 6 May 2013; Revised: 12 August 2013; Accepted: 13 August 2013; Published: 7 October 2013. This work was funded by ONR grants N00014-11-1-0783, N00014-10-1-0200, and N00014-10-1-0811, and NSF grants AGS-1013381, AGS-10131423, and AGS-1008848. The measurements at sea were made possible by the support of the R/V Point Sur crew and staff. We acknowledge NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, for providing weather maps from their website at http://www.esrl.noaa.gov/psd/. The authors gratefully acknowledge the NOAA Air Resources Laboratory (ARL) for the provision of the HYSPLIT transport and dispersion model and READY website (http://ready.arl.noaa.gov) used in this publication. Regina Hitzenberger is acknowledged for helpful comments and suggestions. Edited by: M. C. Facchini
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-11-1-0783
Office of Naval Research (ONR)N00014-10-1-0200
Office of Naval Research (ONR)N00014-10-1-0811
NSFAGS-1013381
NSFAGS-10131423
NSFAGS-1008848
Issue or Number:19
Record Number:CaltechAUTHORS:20131118-100634113
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20131118-100634113
Official Citation:Wonaschütz, A., Coggon, M., Sorooshian, A., Modini, R., Frossard, A. A., Ahlm, L., Mülmenstädt, J., Roberts, G. C., Russell, L. M., Dey, S., Brechtel, F. J., and Seinfeld, J. H.: Hygroscopic properties of smoke-generated organic aerosol particles emitted in the marine atmosphere, Atmos. Chem. Phys., 13, 9819-9835, doi:10.5194/acp-13-9819-2013, 2013.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42520
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:18 Nov 2013 21:58
Last Modified:03 Oct 2019 05:59

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