Drivers of Atmospheric Volatile Methylated Sulfur Variability Across the Southern Ocean and Antarctic Coast

Mynard, Caleb; Franklin, Emily B.; Alroe, Joel; Westwood, Karen; McNabb, Brandon J.; Strzepek, Robert; Tortell, Philippe D.; Siems, Steven T.; Patti, Antonio; Molloy, Suzie; Griffiths, Alan; Miljevic, Branka; Mallet, Marc D.; Humphries, Ruhi; Dunne, Erin

doi:10.5194/acp-26-11583-2026

Articles | Volume 26, issue 16

https://doi.org/10.5194/acp-26-11583-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-26-11583-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 16

Research article

|

17 Aug 2026

Research article |

| 17 Aug 2026

Drivers of Atmospheric Volatile Methylated Sulfur Variability Across the Southern Ocean and Antarctic Coast

Caleb Mynard, Emily B. Franklin, Joel Alroe, Karen Westwood, Brandon J. McNabb, Robert Strzepek, Philippe D. Tortell, Steven T. Siems, Antonio Patti, Suzie Molloy, Alan Griffiths, Branka Miljevic, Marc D. Mallet, Ruhi Humphries, and Erin Dunne

Supplement

https://doi.org/10.5194/acp-26-11583-2026-supplement

Data sets

MISO - Atmospheric dimethyl sulfide (DMS), dimethyl sulfoxide (DMSO) and methanethiol (MeSH) measurements from the RV Investigator voyage IN2024_V01 Caleb Mynard et al. https://doi.org/10.25919/p8bz-p724

MISO - Real-time aerosol chemistry measurements (ToF-ACSM) from the RV Investigator voyage IN2024_V01 Caleb Mynard et al. https://doi.org/10.25919/nk8s-0k87

Chlorophyll Concentration (1 month - Aqua/MODIS)|NASA NASA Earth Observations https://neo.gsfc.nasa.gov/view.php?datasetId=MY1DMM_CHLORA&date=2024-01-17

IN2024_V01 Southern Ocean Voyage Data CSIRO National Collections and Marine Infrastructure https://www.cmar.csiro.au/data/trawler/survey_details.cfm?survey=IN2024_V01

Multi Observation Global Ocean 3D Temperature Salinity Height Geostrophic Current and MLD EU Copernicus Marine Service Product https://doi.org/10.48670/moi-00052

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Short summary

Marine sulfur gases help form climate-cooling particles, but their controls over the Southern Ocean are unclear. During a summer research voyage we measured these gases and linked them to ocean and atmospheric conditions. Near Antarctica, coastal blooms drove sharp rises in dimethyl sulfide while methanethiol remained low. Over the open ocean, both gases varied together, mainly influenced by ocean mixing and temperature, suggesting models should treat coastal and open ocean regions separately.