OCEANFILMS-2: Representing co-adsorption of saccharides in marine films improves agreement of modelled and observed marine aerosol chemistry

TitleOCEANFILMS-2: Representing co-adsorption of saccharides in marine films improves agreement of modelled and observed marine aerosol chemistry
Publication TypeJournal Article
Year of Publication2016
AuthorsBurrows, Susannah, Gobrogge Eric, Fu Li, Link Katie, Elliott Scott M., Wang Hongfei, and Walker Rob
JournalGeophysical Research Letters
Volume43
Number15
Pages8,306 - 8,313
Date Published06/2016
Abstract / Summary

Here we show that the addition of chemical interactions between soluble monosaccharides and an insoluble lipid surfactant monolayer improves agreement of modeled sea spray chemistry with observed marine aerosol chemistry. In particular, the alkane:hydroxyl mass ratio in modeled sea spray organic matter is reduced from a median of 2.73 to a range of 0.41 – 0.69, reducing the discrepancy with previous FTIR observations of clean marine aerosol (ratio: 0.24 - 0.38). The overall organic fraction of submicron sea spray also increases, allowing organic mass fractions in the range 0.5 – 0.7 for submicron sea spray particles over highly active phytoplankton blooms. Sum Frequency Generation (SFG) experiments support the modeling approach by demonstrating that soluble monosaccharides can strongly adsorb to a lipid monolayer likely via Coulomb interactions under appropriate conditions. These laboratory findings motivate further research to determine the relevance of co-adsorption mechanisms for real-world, sea spray aerosol production.

URLhttp://onlinelibrary.wiley.com/doi/10.1002/2016GL069070/full
DOI10.1002/2016GL069070
Journal: Geophysical Research Letters
Year of Publication: 2016
Volume: 43
Number: 15
Pages: 8,306 - 8,313
Date Published: 06/2016

Here we show that the addition of chemical interactions between soluble monosaccharides and an insoluble lipid surfactant monolayer improves agreement of modeled sea spray chemistry with observed marine aerosol chemistry. In particular, the alkane:hydroxyl mass ratio in modeled sea spray organic matter is reduced from a median of 2.73 to a range of 0.41 – 0.69, reducing the discrepancy with previous FTIR observations of clean marine aerosol (ratio: 0.24 - 0.38). The overall organic fraction of submicron sea spray also increases, allowing organic mass fractions in the range 0.5 – 0.7 for submicron sea spray particles over highly active phytoplankton blooms. Sum Frequency Generation (SFG) experiments support the modeling approach by demonstrating that soluble monosaccharides can strongly adsorb to a lipid monolayer likely via Coulomb interactions under appropriate conditions. These laboratory findings motivate further research to determine the relevance of co-adsorption mechanisms for real-world, sea spray aerosol production.

DOI: 10.1002/2016GL069070
Citation:
Burrows, S, E Gobrogge, L Fu, K Link, SM Elliott, H Wang, and R Walker.  2016.  "OCEANFILMS-2: Representing co-adsorption of saccharides in marine films improves agreement of modelled and observed marine aerosol chemistry."  Geophysical Research Letters 43(15): 8306 - 8313.  https://doi.org/10.1002/2016GL069070.