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- W4387617450 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> The sulfur cycle plays a key role in atmospheric air quality, climate, and ecosystems. In this study, we compare the spatial and temporal distribution of four sulfur-containing species, dimethyl sulfide (DMS), sulfur dioxide (SO<sub>2</sub>), particulate methanesulfonate (MSA), and particulate sulfate (SO<sub>4</sub>), that were measured during the airborne NASA Atmospheric Tomography (ATom) mission and simulated by five AeroCom-III models to analyze the budget of sulfur cycle from the models. This study focuses on remote regions over the Pacific, Atlantic, and Southern Oceans from near the ocean surface to ~12-km altitude range, and covers all four seasons. These regions provide us with highly heterogeneous natural and anthropogenic source environments, which is not usually the case for traditional continental studies. We examine the vertical and seasonal variations of these sulfur species over tropical, mid-, and high-latitude regions in both hemispheres. We identify their origins from land versus ocean and from anthropogenic versus natural sources with sensitivity studies by applying tagged tracers linking to emission types and regions. In general, the differences among model results can be greater than one-order of magnitude. Comparing with observations, simulated SO<sub>2</sub> is generally low while SO<sub>4</sub> is high, and the model-observation agreement is much better in ATom-4 (April–May, 2018). There are much larger DMS concentrations simulated close to the sea surface than observed, indicating that the DMS emissions may be too high from all models. Anthropogenic emissions are the dominant source (40–60 % of the total amount) for atmospheric sulfate simulated at locations and times along the ATom flight tracks at almost every altitude, followed by volcanic emissions (18–32 %) and oceanic sources (16–32 %). Similar source contributions can also be derived at broad ocean basin and monthly scales, indicating that any reductions of anthropogenic sulfur emissions would have global impacts in modern times." @default.
- W4387617450 created "2023-10-14" @default.
- W4387617450 date "2023-10-13" @default.
- W4387617450 modified "2023-10-14" @default.
- W4387617450 title "Comment on egusphere-2023-1966 tagging method" @default.
- W4387617450 doi "https://doi.org/10.5194/egusphere-2023-1966-rc2" @default.
- W4387617450 hasPublicationYear "2023" @default.
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