Influence of the Sea Surface Microlayer on Oceanic Iodine Emissions.

ABSTRACT: The influence of organic compounds on iodine (I₂) emissions from the O₃ + I^- reaction at the sea surface was investigated in laboratory and modeling studies using artificial solutions, natural subsurface seawater (SSW), and, for the first time, samples of the surface microlayer (SML). Gas-phase I₂ was measured directly above the surface of liquid samples using broadband cavity enhanced absorption spectroscopy. I₂ emissions were consistently lower for artificial seawater (AS) than buffered potassium iodide (KI) solutions. Natural seawater samples showed the strongest reduction of I₂ emissions compared to artificial solutions with equivalent [I^-], and the reduction was more pronounced over SML than SSW. Emissions of

SUBMITTER: Tinel L 

PROVIDER: S-EPMC7586339 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature