EGU2020-10968
https://doi.org/10.5194/egusphere-egu2020-10968
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Diversity and strength of ice-related dimethyl sulfide sources in the Arctic

Maurice Levasseur1, Martine Lizotte1, Virginie Galindo1, Margaux Gourdal1, and Michel Gosselin2
Maurice Levasseur et al.
  • 1Département de biologie, Québec-Océan and Unité Mixte Internationale 3376 TAKUVIK, CNRS-Université Laval, Ville de Québec, Québec, Canada (maurice.levasseur@bio.ulaval.ca)
  • 2Institut des sciences de la mer de Rimouski (ISMER), Université du Québec à Rimouski, Rimouski, Québec, Canada (michel_gosselin@uqar.ca)

Biogenic sources of sulfur are important precursors of aerosols in the Arctic during the summer months. Recent studies show that peaks in ultrafine particle formation events often coincide with hotspots of dimethyl sulfide (DMS) emissions from the marginal ice zone. During the last 10 years, we explored the diversity of DMS sources associated with the ice and at the marginal ice zone in the Canadian Arctic, and assessed how the projected changes in sea ice extent, thickness, and other properties could strengthen or weaken these emissions. Results from four Arctic expeditions presenting DMS concentrations and dynamics in snow, sea ice, melt ponds, under-ice water, and at the ice edge will be shown and discussed in the context of ongoing and future changes in the cryosphere. The analysis of the pooled dataset points toward an increase in DMS emissions in a warmer Arctic with a potential cooling feedback on climate.

How to cite: Levasseur, M., Lizotte, M., Galindo, V., Gourdal, M., and Gosselin, M.: Diversity and strength of ice-related dimethyl sulfide sources in the Arctic, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-10968, https://doi.org/10.5194/egusphere-egu2020-10968, 2020

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