High-resolution survey of marine dimethylsulfide (DMS) in contrasted marine environments of the Canadian Arctic during the 2016 oceanographic ArcticNet/NETCARE campaign

Conspicuous alterations in the Arctic Ocean are underway and include reductions in snow cover as well as sea ice extent and thickness, the occurrence of which is linked to profound modifications in light availability in surface waters below the ice and at its margin. How these physical changes will impact the dynamics of bloom-forming micro-organisms and their production of the biogenic climate-active gas dimethylsulfide (DMS) are still unknown. Within both ArcticNet and NETCARE research programs, questions such as : 'What are the relative contributions of marginal ice blooms, under ice blooms and melt ponds to the production and sea-air exchanges of DMS?' and What is the relationship between phytoplankton blooms and DMS production/emission in Arctic waters? are explored during this 2016 field season.