Microlayer source of oxygenated volatile organic compounds in the summertime marine Arctic boundary layer.

ABSTRACT: Summertime Arctic shipboard observations of oxygenated volatile organic compounds (OVOCs) such as organic acids, key precursors of climatically active secondary organic aerosol (SOA), are consistent with a novel source of OVOCs to the marine boundary layer via chemistry at the sea surface microlayer. Although this source has been studied in a laboratory setting, organic acid emissions from the sea surface microlayer have not previously been observed in ambient marine environments. Correlations between measurements of OVOCs, including high levels of formic acid, in the atmosphere (measured by an online high-resolution time-of-flight mass spectrometer) and dissolved organic matter in the ocean point to a marine source for the measured OVOCs. That this source is photomediated is indicated by

SUBMITTER: Mungall EL 

PROVIDER: S-EPMC5474767 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature