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Air-Sea Exchange of Biogenic Volatile Organic Compounds and the Impact on Aerosol Particle Size Distributions

Kim, Michelle J. and Novak, Gordon A. and Zoerb, Matthew C. and Yang, Mingxi and Blomquist, Byron W. and Huebert, Barry J. and Cappa, Christopher D. and Bertram, Timothy H. (2017) Air-Sea Exchange of Biogenic Volatile Organic Compounds and the Impact on Aerosol Particle Size Distributions. Geophysical Research Letters, 44 (8). pp. 3887-3896. ISSN 0094-8276. doi:10.1002/2017GL072975.

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We report simultaneous, underway eddy covariance measurements of the vertical flux of isoprene, total monoterpenes, and dimethyl sulfide (DMS) over the Northern Atlantic Ocean during fall. Mean isoprene and monoterpene sea-to-air vertical fluxes were significantly lower than mean DMS fluxes. While rare, intense monoterpene sea-to-air fluxes were observed, coincident with elevated monoterpene mixing ratios. A statistically significant correlation between isoprene vertical flux and short wave radiation was not observed, suggesting that photochemical processes in the surface microlayer did not enhance isoprene emissions in this study region. Calculations of secondary organic aerosol production rates (P_(SOA)) for mean isoprene and monoterpene emission rates sampled here indicate that P_(SOA) is on average <0.1 µg m^(-3)d^(-1). Despite modest P_(SOA), low particle number concentrations permit a sizable role for condensational growth of monoterpene oxidation products in altering particle size distributions and the concentration of cloud condensation nuclei during episodic monoterpene emission events from the ocean.

Item Type:Article
Related URLs:
URLURL TypeDescription
Kim, Michelle J.0000-0002-4922-4334
Yang, Mingxi0000-0002-8321-5984
Blomquist, Byron W.0000-0002-3366-6269
Huebert, Barry J.0000-0001-7711-0468
Cappa, Christopher D.0000-0002-3528-3368
Bertram, Timothy H.0000-0002-3026-7588
Additional Information:© 2017 American Geophysical Union. Received 6 FEB 2017; Accepted 10 APR 2017; Accepted article online 12 APR 2017; Published online 24 APR 2017. This work was supported by a National Science Foundation (NSF) CAREER Award (grant AGS-1151430). The authors thank the entire High Wind Gas Exchange Study science team. Special thanks go to the WHOI Marine Operations staff, Captain Kent Sheasley, and the capable crew of the R/V Knorr. The authors thank the NERC Earth Observation Data Acquisition and Analysis Service (NEODAAS) for supplying refined MODIS chlorophyll a data for this study. DMS, isoprene, and monoterpene mixing ratio and vertical flux measurements during HiWinGS are available at
Funding AgencyGrant Number
Subject Keywords:Air-sea exchange; Marine Trace Gases; Secondary Organic Aerosol
Issue or Number:8
Record Number:CaltechAUTHORS:20170417-125430385
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Official Citation:Kim, M. J., G. A. Novak, M. C. Zoerb, M. Yang, B. W. Blomquist, B. J. Huebert, C. D. Cappa, and T. H. Bertram (2017), Air-Sea exchange of biogenic volatile organic compounds and the impact on aerosol particle size distributions, Geophys. Res. Lett., 44, 3887–3896, doi:10.1002/2017GL072975
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76602
Deposited By: Tony Diaz
Deposited On:17 Apr 2017 21:56
Last Modified:15 Nov 2021 17:01

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