Chemical transfer of dissolved organic matter from surface seawater to sea spray water-soluble organic aerosol in the marine atmosphere.

摘要: It is critical to understand how variations in chemical composition surface seawater (SSW) affect the chemistry of marine atmospheric aerosols. We investigated sea-to-air transfer dissolved organic carbon (DOC) via cruise measurements both ambient aerosols and SSW Oyashio its coastal regions, western subarctic Pacific during early spring. Sea spray (SSAs) were selected based on stable isotope ratio water-soluble (WSOC) (δ13CWSOC) concentrations glucose as a molecular tracer together with local wind speed data. For SSA samples, excitation-emission matrices obtained examine fluorescent material. found that ratios fluorescence intensity humic-like protein-like substances submicrometer SSAs significantly larger than those bulk (~63%). This was also for supermicrometer SSW. The results suggest significant decomposition DOC timescale <12–24 h and/or preferential production regardless particle size. study provides unique insights into complex from ocean atmosphere.