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The biogenic sulfur cycle in the coupled ocean-sea ice-atmosphere system
Ishino, S.; Willis, M.D.; Angot, H.; Bartels-Rausch, T.; crabeck, O.; Delille, B.; Dunne, E.; Franklin, E.; Haddon, A.; Hayashida, H.; Joge, S.D.; Lapere, R.; Lim, H.; Mahajan, A.S.; Mallet, M.D.; Manville, G.; Marelle, L.; Nomura, D.; Pratt, K.A.; Peeken, I.; Price, R.; Simo, R.; Stefels, J.; Thomas, J.L.; Zang, C.L.; Steiner, N. (2026). The biogenic sulfur cycle in the coupled ocean-sea ice-atmosphere system. Elem. Sci. Anth. 14(1): 14. https://dx.doi.org/10.1525/elementa.2025.00067
In: Elementa Science of the Anthropocene. BioOne: Washington. ISSN 2325-1026; e-ISSN 2325-1026, meer
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| Author keywords |
Volatile methylated sulfur (VMS);Dimethyl sulfide (DMS);Methanethiol (MeSH);Biogeochemistry;Arctic Ocean;Southern Ocean;Sea ice;Aerosol and clouds;dimethyl sulfide dms;cloud condensation nuclei;oh-initiated oxidation;temperature-dependent kinetics;intramolecular hydrogen-shift;peroxy radical isomerization;coastal dumont durville;marine boundary-layer;aerosol growth events;salt sulfate aerosols |
| Auteurs | | Top |
- Ishino, S.
- Willis, M.D.
- Angot, H.
- Bartels-Rausch, T.
- crabeck, O., meer
- Delille, B., meer
- Dunne, E.
- Franklin, E.
- Haddon, A.
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- Hayashida, H.
- Joge, S.D.
- Lapere, R.
- Lim, H.
- Mahajan, A.S.
- Mallet, M.D.
- Manville, G.
- Marelle, L.
- Nomura, D.
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- Pratt, K.A.
- Peeken, I.
- Price, R.
- Simo, R.
- Stefels, J.
- Thomas, J.L.
- Zang, C.L.
- Steiner, N.
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| Abstract |
Polar oceans and sea-ice regions are global hot spots for the production of biogenic volatile methylated sulfur (VMS) compounds: dimethyl sulfide (DMS) and methanethiol (MeSH). VMS compounds make important contributions to atmospheric particle formation and cloud property modulation, especially when polar atmospheres are pristine. As a result, the polar biogenic sulfur cycle may induce significant climate feedback in response to ongoing sea ice decline. However, polar VMS production, emission, and atmospheric oxidation processes remain poorly represented in current numerical models, hampering assessments of their radiative impacts and, in turn, implementation of targeted observations necessary for providing predictive understanding of changes in the ocean-sea ice-atmosphere (OIA) system. We synthesize current knowledge of the polar biogenic sulfur cycle and its representation in models. To untangle the existing gaps and provide a roadmap toward predictive understanding, we identify key features of sea ice habitats for biological VMS production, sea ice physical features that enhance or suppress VMS emissions, and atmospheric VMS oxidation at low temperatures that controls the contribution of oxidation products to particle formation or growth. These features are tightly coupled, emphasizing the need for coordinated efforts across disciplines that span the OIA interface, and among observational, experimental, and modeling communities. We recommend 4 priority research areas: (1) model representation of biological VMS production at the sea ice bottom and surface; (2) improved quantification of cloud condensation nuclei (CCN) sensitivity to VMS emissions with updated gas phase and multiphase oxidation chemistry at low temperatures; (3) better spatial and seasonal quantification of MeSH abundance and its biological and chemical controls in sea-ice environments; and specialIntscript assessment of the contribution of episodic extreme VMS emissions during sea ice breakup for the polar CCN budget. |
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