Dimethyl Sulfide (DMS) Climatologies, Fluxes and Trends
In most atmospheric models, the impact of ocean-atmosphere emissions of dimethyl sulfide (DMS) on the Earth’s radiative budget depends on global distributions of seawater DMS concentrations and sea–air flux parameterisations. In two recent papers, a comparison of seawater DMS climatologies and the resultant sea-air fluxes was studied. Large differences, often more than 100 %, are observed between the currently available seawater DMS climatologies. The uncertainty in DMS fluxes is driven by the uncertainty in seawater DMS concentrations in most regions but by the choice of flux parameterisation in others. The results show increasing trends for seawater DMS concentrations and DMS fluxes, but there is significant uncertainty in both.
Reference:
Joge, S.D., Mahajan, A.S., Hulswar, S., et al. (2024). Dimethyl sulfide (DMS) climatologies, fluxes, and trends – Part 1: Differences between seawater DMS estimations. Biogeosci., 21, 4439–4452. https://doi.org/10.5194/bg-21-4439-2024
Joge, S.D., Mahajan, A.S., Hulswar, S., et al. (2024). Dimethyl sulfide (DMS) climatologies, fluxes, and trends – Part 2: Sea–air fluxes. Biogeosci., 21, 4453–4467. https://doi.org/10.5194/bg-21-4453-2024
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