Shipborne Dissolved Organic Gas Measurements in Depth Profiles and Underway Seawater (Methanol, Acetone, Acetaldehyde, DMS, Isoprene) Amundsen 2017

Methanol, acetone, acetaldehyde, DMS and isoprene were measured in seawater in the Canadian Arctic. The aim was twofold; first we aimed to understand the impact of different sea ice concentrations on the dissolved concentrations of these gases, second, these measurements allow a better constraint of the global ocean source/sink strength of these gases. To our knowledge, these measurements represent the first measurements of methanol, acetone, acetaldehyde and isoprene in seawater in the Canadian Arctic and in the sea ice zone in general. These measurements allow an assessment of the impact of air-sea exchange on the local atmospheric concentrations of these gases and thus their impact on aerosol and oxidative capacity.