Marine biogenic emissions of benzene and toluene and their contribution to secondary organic aerosols over the polar oceans.

ABSTRACT: Reactive trace gas emissions from the polar oceans are poorly characterized, even though their effects on atmospheric chemistry and aerosol formation are crucial for assessing current and preindustrial aerosol forcing on climate. Here, we present seawater and atmospheric measurements of benzene and toluene, two gases typically associated with pollution, in the remote Southern Ocean and the Arctic marginal ice zone. Their distribution suggests a marine biogenic source. Calculated emission fluxes were 0.023 ± 0.030 (benzene) and 0.039 ± 0.036 (toluene) and 0.023 ± 0.028 (benzene) and 0.034 ± 0.041 (toluene) μmol m^-2 day^-1 for the Southern Ocean and the Arctic, respectively. Including these average emissions in a chemistry-climate model increased secondary organic aeroso

SUBMITTER: Wohl C 

PROVIDER: S-EPMC9882975 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature