It also provides insights into the development of model Our understanding of this globally abundant aerosol. Provides new insights into the bulk and surface composition of SSA particles and represents a step forward in Some particles after the addition of bacteria, phytoplankton, and growth medium to the seawater. Changes in peak frequencies and relative intensities in the C–H stretching region are seen for SFG spectra indicated disordered alkyl chains, in contrast to what one might expect for a surfactant layer on a The presence of methylene contributions in the Supermicrometer particles primarily resides at the interface. This finding suggests that organic material present in The interfaces of mixed-phase particles, there was a strong SFG response in the aliphatic C–H stretching regionįor both sub- and supermicrometer particles. particles without a solid inclusion), and also However, for external surfaces of homogeneous SSA particles (i.e. Submicrometer particles exhibited a larger amount of organic matter compared to supermicrometer particles. The relative intensities of these features showed a strong dependence on particle size.
With carbon–hydrogen stretches, and from 3200–3700 cm! associated with the oxygen–hydrogen stretches
Region associated with the symmetric stretch of the sulfate anion, the 2800 to 3000 cm! region associated Raman spectra of single particles have bands in the 980 to 1030 cm! Raman microspectroscopy, while the interfacial composition of collections of size-resolved particles is probedīy sum frequency generation (SFG). The composition of individual SSA particles ranging in size from ca. Particles were produced using breaking waves, resulting in compositions and sizes representative of the open Proportions that change as a function of particle size and seawater composition. SSA is comprised of a mixture of inorganic and organic components in varying Major role in influencing climate however the overall impacts remain poorly understood due to the overallĬhemical complexity. Sea spray aerosol (SSA) represents one of the largest aerosol components in our atmosphere. Raman microspectroscopy and vibrational sumįrequency generation spectroscopy as probes of theīulk and surface compositions of size-resolved seaĪndrew P. Downloaded by University of Toronto on 03:07:18.Ĭite this: Phys. Spectroscopy to gain new insights into the bulk and interfacialĬompositions of sea spray aerosol particles. Researchers from three universities focused on using vibrational In an intensive campaign in November 2011 to measure sea sprayĪerosol composition and properties as a function of size. Researchers from around the world participated
Of Oceanography was retrofitted to produce sea spray aerosol fromīreaking waves. (CAICE) focuses on bringing real world complexity into the lab usingĪn ocean in a lab approach. The Center for Aerosol Impacts on Climate and the Environment Generation spectroscopy as probes of the bulk and surfaceĬompositions of size-resolved sea spray aerosol particles Title: Raman microspectroscopy and vibrational sum frequency Showcasing research from the University ofĬalifornia-San Diego, University of Iowa and
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